By sarvika
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ANGUS
25th SPRING BULL SALE
THURSDAY 6 AUGUST 2026 AT 12PM Moondance Chapmans Lane, Chatsbury NSW www.myanga.com.au
Videos will be available with final weights at www.myanga.com.au
Elders
Daniel Tarlington: 0429 499 010
This catalogue aims to provide a comprehensive description of the bulls on offer this year.
Features sons of Poss Wincester, Hart Network
Free delivery within 200km and to major centres in NSW
We are keen to see you at our open day and are happy to discuss any aspect of the bulls catalogued.
Bulls available for inspection from 9 am till 3 pm or by appointment.
Welcome to the 25th Myanga Angus Spring Bull Sale.
Our foundation is built on three core principles: fertility, structural integrity and do cility. We are proud to present our 2026 bull draft for your consideration.
This year's growing season has provided ideal conditions for establishing a strong and consistent feed base for our bulls. As part of our commitment to sustainability, every bull in this sale has been 100% grass-fed by adopting this philosophy we are in building longevity & satiability into our customers bull battery. We believe this is essential to ensure our bulls develop naturally and are ready to perform from the day they arrive on your property.
Our breeding program operates with two tightly managed calving periods- mid-February and early August-calving approximately 200 cows in autumn and 300 cows in spring each year.
Our objective is to produce bulls that combine structural soundness, quiet temperament and strong early growth. We continue to expand our embryo transfer (ET) program to accelerate genetic progress by multiplying the influence of the outstanding Myanga donor females within our herd.
Both our bulls and females are run under commercial conditions, allowing them to demonstrate their natural performance, structural integrity and functionality. Fertility remains a key focus of the Myanga program, with six-week joining periods driving continual genetic improvement. We retain a large proportion of our replacement heifers, reflecting our confidence in producing fertile, females with excellent temperament and longevity. This year's bull lineup represents the continued progression of the Myanga breeding program, offering robust structure, outstanding temperament and exceptional growth. These breeding objectives guide both our sire selection and the bulls we proudly present in this year's sale.
Reference Sires
Winchester was the top-selling feature bull at the 2022 Poss Angus sale. Sired by the widely used and now deceased Connealy Clarity, Winchester is a big-footed, bold-ribbed and deep-bodied sire that combines elite genetics with outstanding phenotype and maternal strength. He ranks in the top 1% of the breed for growth and carcass weight while maintaining exceptional structural soundness.
The top-priced bull from the 2023 Ardrossan sale, Southern Cross combines outstanding phenotype with an equally impressive genomic profile. He offers
Hart Network (USA20488998)
Schiefelbein Top Gun 522
Kind Regards, The Dunne Family excellent calving ease, quiet temperament and positive fat figures. His EMA, Rib Fat, Rump Fat and IMF all rank within the top 20% of the breed, making him an exciting all-round sire.
Hart Network has delivered significant genetic improvement across the key traits we value most. He ranks in the top 1% of the breed for both 200-day and 400-day growth, while consistently improving structural soundness and foot quality throughout his progeny. His carcass performance is equally impressive, also placing him in the top 1% of the breed. We have been extremely pleased with his progeny and have retained all of his heifer calves as future breeding females.
A product of the highly respected Schiefelbein breeding program, Top Gun adds growth, frame, style and structural correctness. His progeny continue to display the combination of performance, soundness and quiet temperament that aligns perfectly with the Myanga breeding philosophy.
This year's lineup is one of our strongest to date, offering exciting outcross genetics combined with exceptional growth, structural integrity and outstanding temperament. We are confident these bulls will add value to commercial and seedstock operations alike, and we thank you for your continued interest and support of the Myanga Angus program.
The strength of the Myanga herd has always been built on the quality of our cow families. While growth and performance remain important, we place equal emphasis on maternal excellence, selecting females that consistently demonstrate fertility, longevity, structural soundness, good udders and quiet temperament. Our breeding decisions are made with the long-term commercial producer in mind, ensuring our bulls leave behind productive daughters that are easy doing, efficient and capable of raising a quality calf year after year. The continued expansion of our ET program allows us to multiply the influence of these proven cow families and accelerate maternal genetic progress throughout the herd.
We look forward to welcoming you to our 25th Annual Myanga Angus Spring Bull Sale.
AuctionsPlus
How to Register and Bid on AuctionsPlus
to register at least 48 hours before the sale.
Select "Sign Up" in the top right hand corner.
Go to your emails and confirm the account.
For more information please contact us on:
Phone: (02) 9262 4222
Email: [email protected]
Fill in buyer details and once completed go back to Dashboard.
Complete buyer induction module (approx. 30 minutes).
AuctionsPlus will email you to let you know that your account has been approved.
Log in on sale day and connect to auction.
Bid using the two-step process - unlock the bid button and bid at that price.
If you are successful, the selling agent will contact you post sale to organise delivery and payment.
INSPECTIONS
Welcome any time by appointment or from 9.00am on sale day.
There is no vendor insurance on sale bulls. It will be the responsibility of the purchaser to insure their bulls.
Rebate of 2% on sale bulls will be offered to outside agents introducing clients in writing prior to the sale or in attendance on day of sale.
Delivery will be arranged as cheaply as possible, with FREE delivery of bulls for the first 200km and to major NSW centres. Bulls remaining at Myanga pending delivery are at the purchaser's risk.
A buyer's number system will be in operation. Therefore, all prospective purchasers will be required to register on or prior to sale day at the agent's office prior to commencement of the sale.
All persons who attend the sale do so at their own risk, and vendors therefore assume no liability. All persons entering bull pen's do so at their own risk.
Please NO children allowed in bull pen's at the Myanga sale complex.
In order for Angus Australia to process the transfer of a registered animal in this catalogue, the vendor will need to provide certain information to Angus Australia and the buyer consents to the collection and disclosure of that information by Angus Australia in certain circumstances. If the buyer does not wish for his or her information to be stored and disclosed by Angus Australia, the buyer must complete the form included below and forward it to Angus Australia. If the form is not completed, the buyer will be taken to have consented to the disclosure of such information.
MYANGA QUALITY
All Myanga Bulls in this catalogue have been:
Birth, P8 Fat, Rib Fat, Eye muscle and IMF scan data submitted to Angus Australia.
SNP tested for production traits using Angus GS.
Sire verified through DNA testing.
Independently assessed for structure.
Vet inspected and have passed a thorough reproductive examination involving testicular palpation, penile inspection, crush side semen motility and sperm morphology assessment.
Tested to be PI (Bovine Pestivirus carrier state) free.
Vaccinated with 7 in 1, Vibriosis vaccinated, Pestigard vaccinated and drenched with Nitromec.
Animal details included in this catalogue, including but not limited to pedigree, DNA information, Estimated Breeding Values (EBVS) and Index values, are based on information provided by the breeder or owner of the animal. Whilst all reasonable care has been taken to ensure that the information provided in this catalogue was correct at the time of publication, Angus Australia will assume no responsibility for the accuracy or completeness of the information, nor for the outcome (including consequential loss) of any action taken based on this information.
The animals listed within this catalogue including its pedigree, are displaying a Parent Verification Suffix which indicates the DNA parent verification status that has been conducted on the animal. The Parent Verification Suffixes that will appear at the end of each animal's name.
The suffix displayed at the end of each animal's name indicates the DNA parentage verification that has been conducted by Angus Australia.
PV: both parents have been verified by DNA SV: the sire has been verified by DNA DV: the dam has been verified by DNA #: DNA verification has not been conducted E: DNA verification has identified that the sire and/or dam may possibly be incorrect, but this cannot be confirmed conclusively.
SUPPLEMENTARY SHEET
With updated weights available prior to the sale on www.myanga.com.au GUARANTEE
Myanga guarantee all bulls to be fertile and capable of natural service, however any claims must be accompanied by a veterinary certificate and made within 6 months of sale date.
Structural problems in cattle have a substantial effect on both the reproductive and growth performance of a beef herd. It is widely recognised that structural problems in sires have detrimental effects on conception rates, calving patterns and thus profitability. Similarly, females with inadequate structural characteristics are more prone to weaning lighter calves or conceiving later in the breeding season than their more functional counterparts. These structural problems are filtered through the supply chain resulting in reduced income for the producer, feedlot and thus reducing the overall productivity of the Australian Beef Industry. Over the two decades, use of the Beef Class Structural Assessment System in the seedstock industry has produced a marked improvement in herds which have shown commitment to using the information appropriately. Through these dedicated breeders, there has been a flow on affect of structural improvement through out all sectors of the beef cattle industry. This structural analysis has allowed the formation of structural EBV's which are gaining momentum within the industry. Liam Cardile of 'BEEFXCEL' structurally assesses many of the leading seedstock herds in Australia. 'BEEFXCEL' is not involved in any genetic marketing or specific breeding advice and therefore has no conflict of interests to influence their stock appraisal. The integrity of the structural data provided by 'BEEFXCEL' is recognised throughout the industry as Liam is a fully INDEPENDENT assessor.
'MYANGA' STRUCTURAL PROGRAM:
The 2026 'MYANGA' Sale Bulls have been independently structurally assessed to maximise the quality of stock on offer. Any animals deemed inadequate have been removed from the sale draft. All bulls were assessed by Liam Cardile of BEEFXCEL on 9th May 2026. Please contact Liam directly if you wish to discuss the assessment system.
HOW TO USE THE BEEF CLASS STRUCTURAL ASSESSMENT SYSTEM
The Beef Class Structural Assessment System uses a 1-9 scoring system;
A score of 5 is ideal. (Note: Temperament Score of 1 is preferable)
A score of 4 or 6 shows slight variation from ideal, but this includes most animals. An animal scoring 4 or 6 would be acceptable in any breeding program.
A score of 3 or 7 shows greater variation but would be acceptable in most commercial programs. However, seedstock producers should be vigilant and understand that this score indicates greater variation from ideal.
A score of 2 or 8 are low scoring animals and should be looked closely before purchasing.
A score of 1 or 9 should not be catalogued and are considered culls.
CLAW SET
Less Favourable
REAR LEG HIND VIEW
Less Favourable
FRONT & REAR FOOT ANGLE
Less Favourable
REAR LEG SIDE VIEW
TABLE
2026 BULL SALE - QUICK EBV
+0.66 +0.68 +0.76 $244 +0.90 +0.86 +0.72 $248 $407 -5.4 +0.8 +3.2 -0.13 +8 +0.66 +0.86 +0.94 $249 $451 +0.8 +0.9 +0.23 +23 +0.68 +0.96 +0.78 $214 $355 -0.5 +3.0 +0.10 +0.90 +0.90 +0.90 $197 $344 +0.7 +3.1 +0.55 +3 +0.76 +0.76 +0.80 $279 $429 -0.2 +2.3 -0.18 +32 +1.00 +0.98 +1.02 $203 $349 IMF NFI-F DOC Claw Angle Leg $A $A-L +2.6 +0.24 +21 +0.83 +0.97 +1.02 $211 $360
$A $A-L
Selection Indexes
NFI-F DOC Claw Angle Leg +0.76 +0.94
Structural
Other
IMF
+0.1 +0.1 +8.0 +1.8 -1.1 +0.1 +11.4 -3.7 +12.3 +1.5 +1.5 +1.8 +0.8 -0.1 +14.2 +0.0 -1.7 -5.5 +72 +4.5 +0.1 +1.6 DTC CWT EMA RIB -5.0 +69 +0.1
EBV Quick Reference for Myanga Angus Bull Sale
RIB
CWT EMA
+5.3 +62 +112 +143 +124 +0.45 +6.6 +13 +1.9 -3.9 +81 +4.6 +63 +110 +125 +100 +0.41 +5.0 +15 +2.1 -5.5 +76 +0.41 +7.5 +11 +2.8 -4.6 +101 +0.32 +5.4 +24 +0.40 +7.1 +16 +0.38 +2.9 +11 +0.38 +7.1 +11 MBC MBH Milk +0.30 +8.1
+2.0 +63 +117 +142 +136 +0.41 +9.7 +16 +3.2 -6.2 +80 MYA24V213 +1.1 +3.1 -5.1 +4.5 +50 +97 +120 +123 +0.53 +123 +155 +131 +0.21 +9.0
SS DTC +2.1 -7.0 +0.36 +10.3 +14 +2.1 -3.5 +5.5 -5.6 +5.2 +64 +113 +142 +144 +0.44 +7.3 +12 +3.7 -5.8
Fertility
CEDir CEDtrs GL 600 MCW MBC MBH Milk MYA24V163 +1.1 +3.1 -6.4 +4.5 +63 +118 +139 +138 +0.33 +8.0 +12 2 MYA24V139 -0.3 +4.4 -9.7 +4.9 +64 +114 +138 +139
13 MYA24V146 -0.9 +2.0 -7.9 +3.2 +48 +74 14 MYA24V175 +4.1 +9.2 -4.5 +3.1 +62 +107 +0.37 +9.5 +14 15 MYA24V164 -2.2 -1.3 -5.1 +6.7 +68 +136 +0.19 +7.4 +20 16 MYA24V168 +0.7 +2.8 -6.5 +6.3 +63 +127 +0.40 +8.3 17 MYA24V156 +2.5 +5.3 -5.4 +4.9 +49 +83 +112 +94 +0.14 +6.1 +19 18 MYA24V191 +7.0 +4.7 -8.2 +3.5 +54 +92 +116 +115 +0.23 +6.6 19 MYA25W19 +4.8 +9.0 20 MYA25W9 -0.5 +7.4 -3.4 21 MYA25W33 +3.3 +2.7 -3.6 22 MYA25W2 -2.3 -0.4 -6.1 23 MYA25W83 +0.9 -2.1 -0.2 24 MYA25W37 +3.3 +4.1 -4.4 25 MYA25W32 -0.2 +0.8 26 MYA25W74 +2.0 +6.7
MYA24V208 +1.9 -2.0 -5.2 +6.7 +63 +105 +135 +138 MYA24V260 -2.0 +1.9 -4.5 +6.3 +60 +104 +143 +127
29 MYA24V194 -4.2 -1.6 -7.0 +6.2 +59 +98 +127 +122 CEDir CEDtrs GL BWT 200 600 MCW +121
+52 +96 +91 +104 +90 28 MYA25W85 +4.2 +6.0 -1.1 +4.2 +65 +106 +123 +85
Growth
MYA24V274 -6.1 +2.4 -8.5 +6.0 10 MYA24V240 -12.9 +0.6 -2.8 +9.7 11 MYA24V227 +2.6 +7.8 -7.9 +5.5 +54 +101
BWT 200
6 MYA24V144 -1.1 +5.1 -8.2 +6.8 +71
-6.3 -3.2 +3.5 27 MYA25W66 +6.5 +7.7 -5.2 +1.3
EBV Quick Reference for Myanga Angus Bull Sale
MBC MBH Milk +26 +0.09 +2.0 +31 +3.3 -5.7
CEDir CEDtrs GL BWT 200 30 MYA24V145 +11.0 +10.3 -4.0 -3.1
BWT 200
33 MYA24V234 +1.4 34 MYA24V155 +3.6 35 MYA24V154 +9.1 36 MYA24V220 -12.3 38 MYA24V243
ཡུ ཙྩེ Š ཤ ༈ རྟེ ཀྟྭཱ
SPRING CREEK ACCLAIM 7049SV MYANGA WILCOOLA K7SV Selection Indexes
Traits Observed: BWT,Scan (EMA,Rib,Rump,IMF),Genomics TE MANIA KIRBY K138PV TE MANIA BEEAC M122SV
N BAR BANDO 5175 Y54PV ARDROSSAN JAPARA Y251* Selection Indexes
Traits Observed: BWT,Scan (EMA,Rib,Rump,IMF),Genomics TE MANIA KIRBY K138PV
AMFU,CAFU,DDFU,NHFU
SINCLAIR GRASS MASTER* HARDHAT GM GRASS RANGE Y21 J518PV KANSAS ANNIE Y21SV
SINCLAIR GRASS MASTER* HARDHAT GM GRASS RANGE Y21 J518PV KANSAS ANNIE Y21SV
PC BRAVEHEART J069SV MYANGA WILCOOLA G92* Selection Indexes
Sire: USA20491889 SCHIEFELBEIN TOP GUN 522PV SCHIEFELBEIN SHOWMAN 338PV FROST BISMARCK 3041*
Dam: MYA21S88 MYANGA S88PV
DSK T410 JUSTIFY J29SV MYANGA DESIGNER N108" Selection Indexes
Traits Observed: BWT,Scan (EMA,Rib,Rump,IMF),Genomics TE MANIA KIRBY K138PV
RAFF DAZZLER D353SV KENNY'S CREEK D95PV Selection Indexes
Traits Observed: BWT, Genomics VAR POWER PLAY 7018* VINTAGE RITA 5063"
KENNY'S CREEK REGENT G287PV MYANGA PRINCESS G37" Selection Indexes
MYANGA PRINCESS K208"
FROSTY ELBA 4220"
Mid July 2026 TransTasman Angus Cattle Evaluation
Mating: ET Traits Observed: BWT,Scan (EMA,Rib,Rump,IMF),Genomics TE MANIA KIRBY K138PV
ཡ ཙྩེ ྃ ཋ ཎྜ རྐེ ལྔ
TE MANIA KIRBY K138PV TE MANIA BEEAC M122SV
SITZ NEW DESIGN 458N* THE LAURELS CLARINET C40SV
DSK HLE BRUTE STRENGTH B24PV MYANGA CONCHITA Y22"
ARDROSSAN EQUATOR A276PV MYANGA WILCOOLA X22* Selection Indexes
JINDRA ACCLAIMSV SJH COMPLETE OF 353F 0100*
N BAR BANDO 5175 Y54PV MYANGA WILCOOLA X5*
MATAURI REALITY 839* GILMANDYKE EVA J0168* Selection Indexes
BRAVEHEART OF STERNSV PC MISS 338 RIGHT TIME D82PV
RAFF DAZZLER D353SV MYANGA WILCOOLA B78* Selection Indexes
$GS æ ཙྩེ རྞ ⇨ ཟླ རྦ ལྔ
ཡེ བྷྲ ྂ ཤ ༈ ཊྛོ ལྔ
CHERRY CREEK LAND GRANT* BRESHIE OF CONANGA 6988*
བྷྱཿ ཤྲཱ ྂ ⌘ ༅ ནྟུཾ གྷ
MILLAH MURRAH KLOONEY K42PV GILMANDYKE DORIS K0578PV
CHERRY CREEK LAND GRANT* BRESHIE OF CONANGA 6988*
EXAR STALLION 7986* EXAR HENRIETTA PRIDE 5702*
GILMANDYKE KLOONEY M405PV MYANGA VENUS D87* Selection Indexes
MILLAH MURRAH KLOONEY K42PV GILMANDYKE DORIS K0578PV
ཚ དྷྲྀ ཏྱཾ ཤ ༈ ཊྛོ ལྔ
Traits Observed: BWT,Scan (EMA,Rib,Rump,IMF),Genomics SS NIAGARA Z29SV
RAFF MIDLAND Z204PV MYANGA Z12" Selection Indexes
BASIN FRANCHISE P142* EF EVERELDA ENTENSE 6117*
Mating: Al MILL BRAE IDENTIFIED 4031" HP CA SUNRISE A246*
KM BROKEN BOW 002PV SPRING COVE LIZA 021"
JINDRA ACCLAIMSV SJH COMPLETE OF 353F 0100*
N BAR BANDO 5175 Y54PV ARDROSSAN JAPARA Y251* Selection Indexes
VAR POWER PLAY 7018* VINTAGE RITA 5063"
PC BRAVEHEART J069SV MYANGA LOUISE G65* Selection Indexes
Traits Observed: BWT,Scan (EMA,Rib,Rump,IMF),Genomics SS NIAGARA Z29SV
DSK HLE BRUTE STRENGTH B24PV MYANGA VENUS B37" Selection Indexes
MYANGA DESIGNER V243PV
Traits Observed: BWT, Scan (EMA, Rib,Rump,IMF), Genomics
DSK T410 JUSTIFY J29SV MYANGA DESIGNER N108* Selection Indexes
HARDHAT GM GRASS RANGE Y21 J518PV KANSAS JILLIE K147"
MYANGA DESIGNER Q85SV
MYANGA ANNIE N57*
Mid July 2026 TransTasman Angus Cattle Evaluation
Angus Cattle Evaluation (TACE)
What is the TransTasman Angus Cattle Evaluation?
The TransTasman Angus Cattle Evaluation is the genetic evaluation program adopted by Angus Australia for Angus and Angus influenced beef cattle. The TransTasman Angus Cattle Evaluation uses Best Linear Unbiased Prediction (BLUP) technology to produce Estimated Breeding Values (EBVS) of recorded cattle for a range of important production traits (e.g. weight, carcase, fertility). The TransTasman Angus Cattle Evaluation is an international genetic evaluation and includes pedigree, performance and genomic information from the Angus Australia and Angus New Zealand databases, along with selected information from the American and Canadian Angus Associations. The TransTasman Angus Cattle Evaluation utilises a range of genetic evaluation software, including the internationally recognised BLUPF90 family of programs, and BREEDPLAN® beef genetic evaluation analytical software, as developed by the Animal Genetics and Breeding Unit (AGBU), a joint institute of NSW Agriculture and the University of New England, and Meat and Livestock Australia Limited (MLA). What is an EBV?
An animal's breeding value can be defined as its genetic merit for each trait. While it is not possible to determine an animal's true breeding value, it is possible to estimate it. These estimates of an animal's true breeding value are called EBVS (Estimated Breeding Values). EBVs are expressed as the difference between an individual animal's genetics and a historical genetic level (i.e. group of animals) within the TACE genetic evaluation, and are reported in the units in which the measurements are taken.
Using EBVs to Compare the Genetics of Two Animals
TACE EBVS can be used to estimate the expected difference in the genetics of two animals, with the expected difference equating to half the difference in the EBVS of the animals, all other things being equal (e.g. they are joined to the same animal/s). For example, a bull with a 200 Day Growth EBV of +60 would be expected to produce progeny that are, on average, 10 kg heavier at 200 days of age than a bull with a 200 Day Growth EBV of +40 kg (i.e. 20
TransTasman Angus Cattle Evaluation kg difference between the sire's EBVs, then halved as the sire only contributes half the genetics). Or similarly, a bull with an IMF EBV of +3.0 would be expected to produce progeny with on average, 1% more intramuscular fat in a 400 kg carcase than a bull with a IMF EBV of +1.0 (i.e. 2% difference between the sire's EBVs, then halved as the sire only contributes half the genetics). Using EBVs to Benchmark an Animal's Genetics with the Breed
EBVs can also be used to benchmark an animal's genetics relative to the genetics of other Angus or Angus infused animals recorded with Angus Australia. To benchmark an animal's genetics relative to other Angus animals, an animal's EBV can be compared to the EBV reference tables, which provide:
the breed average EBV the percentile bands table
The current breed average EBV is listed on the bottom of each page in this publication, while the current EBV reference tables are included at the end of these introductory notes.
For easy reference, the percentile band in which an animal's EBV ranks is also published in association with the EBV.
An accuracy value is published with each EBV, and is usually displayed as a percentage value immediately below the EBV.
The accuracy value provides an indication of the reliability of the EBV in estimating the animal's genetics (or true breeding value), and is an indication of the amount of information that has been used in the calculation of the EBV. EBVs with accuracy values below 50% should be considered as preliminary or of low accuracy, 50-74% as of medium accuracy, 75-90% of medium to high accuracy, and 90% or greater as high accuracy.
EBVs are calculated for a range of traits within TACE, covering calving ease, growth, fertility, maternal performance, carcase merit, feed efficiency and structural soundness. A description of each EBV included in this publication is provided on the following page.
CEDir
UNDERSTANDING ESTIMATED BREEDING VALUES (EBVS)
Genetic differences in the ability of a sire's calves to be born unassisted from 2 year old heifers. calving difficulties in 2 year old heifers.
Calving Ease/Birth
CEDtrs days
Genetic differences in the ability of a sire's daughters to calve unassisted at 2 years of age.
Higher EBVs indicate fewer calving difficulties in 2 year old heifers. Genetic differences between animals in the length of time from the date of conception to the Lower EBVs indicate shorter birth of the calf. gestation length. Lower EBVS indicate lighter birth weight.
Genetic differences between animals in live weight at 200 days of age due to genetics for Higher EBVS indicate heavier growth.
Genetic differences between animals in calf weight at birth.
Genetic differences between animals in live weight at 400 days of age.
Genetic differences between animals in live weight at 600 days of age.
Genetic differences between animals in the height of mature females.
Genetic differences between animals in the body condition of mature females.
Genetic differences between animals in live weight of cows at 5 years of age.
Higher EBVS indicate more body condition of mature females.
Higher EBVS indicate heavier mature weight.
Genetic differences between animals in live weight at 200 days of age due to the maternal Higher EBVS indicate heavier contribution of its dam. live weight.
Genetic differences between animals in the time from the start of the joining period (i.e. when the Lower EBVs indicate shorter female is introduced to a bull) until subsequent calving. time to calving.
Genetic differences between animals in scrotal circumference at 400 days of age.
Higher EBVs indicate larger scrotal circumference. Higher EBVS indicate heavier carcase weight.
Genetic differences between animals in hot standard carcase weight at 750 days of age. Genetic differences between animals in eye muscle area at the 12/13th rib site in a 400 kg Higher EBVs indicate larger cm²
Genetic differences between animals in fat depth at the 12/13th rib site in a 400 kg carcase.
Genetic differences between animals in fat depth at the P8 rump site in a 400 kg carcase.
Genetic differences between animals in boned out saleable meat from a 400 kg carcase. Genetic differences between animals in intramuscular fat (marbling) at the 12/13th rib site in Higher EBVs indicate more a 400 kg carcase. intramuscular fat.
Genetic differences between animals in feed intake at a standard weight and rate of weight Lower EBVS indicate more gain when animals are in a feedlot finishing phase.
Genetic differences in claw set structure (shape and evenness of claws).
Genetic differences in foot angle (strength of pastern, depth of heel).
Genetic differences in rear leg structure when viewed from the side (angle at front of the hock).
Genetic differences between animals in net profitability per cow joined in a typical commercial self replacing herd using Angus bulls. This selection index is not specific to a particular market end-point, but identifies animals that will improve overall net profitability in the majority of commercial, self replacing, grass and grain finishing beef production systems.
The $A-L index is similar to the $A index but is modelled on a production system where feed is surplus to requirements for the majority of the year, or the cost of supplying additional feed when animal feed requirements increase is low.
While the $A aims to maintain mature cow weight, the $A-L does not aim to limit the increase in mature cow weight as there is minimal cost incurred if the feed maintenance requirements of the female breeding herd increase as a result of selection decisions.
feed efficiency.
Higher EBVS indicate better temperament.
Lower EBVs indicate less curl of the claw set.
Lower EBVS indicate more heel depth.
Lower EBVs indicate a less angular leg angle.
Higher selection indexes indicate greater profitability.
Higher selection indexes indicate greater profitability.
Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd targeting the domestic supermarket trade. Steers are either finished using pasture, pasture supplemented by grain, or grain (e.g. 50-70 days) with steers assumed to be slaughtered at 510kg live weight (280kg carcase weight with 12mm P8 fat depth) at 16 months of age.
The $D-L index is similar to the $D index but is modelled on a production system where feed is surplus to requirements for the majority of the year, or the cost of supplying additional feed when animal feed requirements increase is low.
While the $D aims to maintain mature cow weight, the $D-L does not aim to limit the increase in mature cow weight as there is minimal cost incurred if the feed maintenance requirements of the female breeding herd increase as a result of selection decisions.
Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd targeting pasture grown steers with a 250 day feedlot finishing period for the grain fed high quality, highly marbled markets. Steers are assumed to be slaughtered at 800 kg live weight (455 kg carcase weight with 30 mm P8 fat depth) at 24 months of age, with a significant premium for steers that exhibit superior marbling.
The $GN-L index is similar to the $GN index but is modelled on a production system where feed is surplus to requirements for the majority of the year, or the cost of supplying additional feed when animal feed requirements increase is low.
While the $GN aims to maintain mature cow weight, the $GN-L does not aim to limit the increase in mature cow weight as there is minimal cost incurred if the feed maintenance requirements of the female breeding herd increase as a result of selection decisions.
Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd targeting pasture finished steers. Steers are assumed to be slaughtered at 650 kg live weight (350 kg carcase weight with 12 mm P8 fat depth) at 22 months of age. Emphasis has been placed on eating quality and tenderness to favour animals that are suited to MSA requirements.
The $GS-L index is similar to the $GS index but is modelled on a production system where feed is surplus to requirements for the majority of the year, or the cost of supplying additional feed when animal feed requirements increase is low.
While the $GS aims to maintain mature cow weight, the $GS-L does not aim to limit the increase in mature cow weight as there is minimal cost incurred if the feed maintenance requirements of the female breeding herd increase as a result of selection decisions.
Genetic differences between animals in net profitability per cow joined in a commercial self replacing herd based in New Zealand that targets the production of grass finished steers for the AngusPure programme. Steers are assumed marketed at approximately 530 kg live weight (290 kg carcase weight with 10 mm P8 fat depth) at 20 months of age, with a significant premium for steers that exhibit superior marbling.
Genetic difference between animals in net profitability per cow joined in a situation where Angus bulls are being used as a terminal sire over mature breeding females and all progeny, both male and female, are slaughtered. The Angus Terminal Sire Index focusses on increasing growth, carcase yield and eating quality. Daughters are not retained for breeding and therefore no emphasis is given to female fertility or maternal traits.
Recommendations for the introduction and management of your new bull:
1. UPON ARRIVAL:
HVC production & breeding a) Ensure your new bulls socialises with a group of animals, (anything except other bulls) in the yards, when they arrive.
b) Run the new bulls with a small group of empty females, (he has come from a different herd and may not have had exposure to some of the normal pathogens present in your herd - see further information below).
This MUST be done with the empty females, for a period of 2 to 4 weeks. Ideally the bull can then be rested for 6-8 weeks prior to joining.
Ideally give the cows prostaglandin every 2 weeks so they continue to cycle. c) Ideally bulls should be insured for their first year as standard.
2. PRE-JOINING:
a) We recommend a breeding soundness examination (BSE), including structural assessment, testicular palpation, service ability testing and semen testing (essential in single sire matings). This is mandatory for second joining and older bulls each year. It will improve the fertility performance of the herd, by removing infertile bulls from the joining group. If bulls are not service tested it is essential that you observe the bulls serve in the first week on joining.
These bulls will be given a risk rating and mating potential which will influence joining bull teams.
b) Keep vaccinations up to date; Vibrovax, Leptospirosis 7-in-1, Pestigard and an annual drench, 4-6 weeks prior to joining.
3. JOINING new bulls have the highest risk of breakdown in the herd, this risk can be reduced by:
a) PROTECT a new bull by not over-joining, 30 females per virgin bull maximum. b) Recommended to multi-sire join.
i. Ideally mixing bulls of different age groups, experience levels and risk ratings. c) It is recommended, IF single sire joining with a new bull, to rotate him with a proven bull for at least one cycle. Also, it is good practice to rotate proven bulls for the last cycle with all new bulls.
"Most new bull fertility issues develop or are acquired during the joining period, rather than being pre-existing problems, this means that bull observation during the joining period is essential!
ONCE THE JOINING PROGRAM IS SET UP, MONITORING IS ESSENTIAL
TO IDENTIFY ISSUES AS THEY DEVELOP.
Your new bulls need to be run in mobs that are easily monitored, keep them close to promote observation, check them 2 to 3 times a week for the first three weeks and then weekly thereafter. This involves looking for, 1. The bull serving, (this has not been successful until the bull thrusts). If bulls are continually mounting without serving it is often a sign the bull has developed a penile infection and needs to be rested and replaced immediately. Sound bulls should serve every 1 to 2 mounts.
2. Lameness.
3. Evidence of penile or preputial swelling or inflammation.
4. Signs of ill health, lethargy, etc.
5. Estimate the number of females cycling, (for every 20 females, one cycles each day at the commencement of joining). After three weeks of joining, there should only be one cow cycling every three days in 20 females.
HVC production & breeding www.holbrookvetcentre.com.au
4. POST-JOINING:
a. Annual breeding soundness evaluation is a non-negotiable procedure. b. Good management of bulls is a year-round procedure.
i. Keep bulls in working body condition - they should be in body condition score 3/5 at the start of mating, which will involve removing weight following the joining period.
ii. Manage bulls in groups of joining teams to establish stable social hierarchies and minimise bull fighting.
Bulls need to be removed from the cows at the same time, to help create their bull mobs. This will limit the number of potential injuries by reducing the number of bull interactions.
Bull paddock management is very important to minimise injury between joinings. The bulls need enough room to reduce fighting, restricted feed and water will increase interaction. Paddocks will require co-grazing with sheep, or crash-grazing by other mobs to manage feed quality and quantity on offer for the bulls.
✓ The target between joining is to restrict weight gain in older bulls to prevent breakdowns. Ideally young bulls have access to a higher level of nutrition as they continue to grow.
✓ Early pregnancy testing is essential for good female management and detection of surprises. The earlier the pregnancy testing is undertaken, the more likely the cause of the problem will be identified. This will not only give you early notice of the problem but also help in formulating a plan to help reduce the chance of the problem occurring again in the future.
PENILE INFECTIONS IN BULLS - "Balanoposthitis":
Penile infections are a common disease in young bulls during their first joining season in any new herd. Mitigating the risk of this disease as outlined above is essential to reduce the number of breakdowns and optimise bull cost per calf.
These infections are caused by a range of bacterial, viral, and other organisms ("pathogens"). The genital form of infectious bovine rhinotracheitis (IBR; herpes virus) is commonly implicated. The issue is that any given property has its own population of reproductive tract pathogens and if the new bulls make their first contact with these pathogens at the time of high workload (such as joining) they are at a high risk of developing a penile injury.
These injuries typically involve a reddened inflamed penis, developing to ulceration and pustules. Some bulls will stop serving due to pain (will continue to mount, but not serve), but other high libido bulls will continue to serve and create significant inflammation commonly leading to preputial tears, abscesses and prolapses. These are often perceived to be a “broken penis", which they are not and IF treated promptly may regain normal function!
Treatment involves prompt removal of the affected bull from the joining mob, sexual rest (typically for the remainder of the joining) and treatment with antibiotics and anti-inflammatories. Preputial prolapses require surgical replacement.
If undetected these injuries commonly cause a significant decrease in pregnancy rate and commonly result in permanent infertility in the bull. Observation and intervention are essential!
Prevention of this condition is best achieved as outlined above, by deliberate pre-exposure of new bulls to a small number of females (low workload) well before the joining so that they are exposed and can develop immunity to the herds' pathogens prior to the high workload of the joining period.
Positive fertility outcomes are a significant driver of profitability in beef breeding enterprises, but this requires informed and active management!
Dr. Shane Thomson BVetBio. BVSc. MAnSc. for HOLBROOK VETERINARY CENTRE.
HVC production & breeding www.holbrookvetcentre.com.au
NOTES
From Goulburn travel north along the Goulburn Taralga road for approx 20km, crossing the Tarlo river.
Turn right into Chapmans Lane.
Follow the lane around (approx 2kms) to Moondance on your left.
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