the role genetics plays in achieving the perfect msa index...↑ carcass . wt . within carcass specs...
TRANSCRIPT
![Page 1: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/1.jpg)
![Page 2: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/2.jpg)
The role genetics plays in achieving the perfect MSA Index
Tim Emery - Technical Officer (TBTS)
![Page 3: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/3.jpg)
To produce profitable cattle
![Page 4: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/4.jpg)
Disease
Parasites
GENES Dam
Age Age
Feed
![Page 5: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/5.jpg)
High Heritability
Example: Frame Size or Yield
Environment
![Page 6: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/6.jpg)
Low Heritability
Example: Reproduction traits
Environment
![Page 7: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/7.jpg)
Breeding Values describe Genes
Performance = GENES + Environment
Estimated Breeding Values - EBVs
Phenotype = Genotype + Environment
![Page 8: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/8.jpg)
That depends on:
Your production system
Your crystal ball
![Page 9: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/9.jpg)
• Weaning % • Growth • Carcase
– lean meat yield – eating quality
• Maternal • Feed intake • Management - welfare
Identify which traits drive profit in your
business and select for those traits!
![Page 10: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/10.jpg)
What impacts on the MSA Index? The key factors impacting on eating quality influenced by the producer are:
Other factors include:
• Tropical breed content
• MSA marbling score
• Ossification score
• HGP status
• Milk-fed vealer category
• Saleyard status
• Rib fat
• HSCW
• Sex
![Page 11: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/11.jpg)
What impacts on the MSA Index? The key factors impacting on eating quality influenced by the producer are:
Other factors include:
• Tropical breed content
• MSA marbling score
• Ossification score
• HGP status
• Milk-fed vealer category
• Saleyard status
• Rib fat
• HSCW
• Sex
Can influence with breeding decisions
![Page 12: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/12.jpg)
Tropical Breed Content
Bos Indicus % impacts on EQ
outcomes
• In production systems where Bos Indicus content is required, select traits within breed that will improve EQ.
![Page 13: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/13.jpg)
MSA Marbling Score Intramuscular Fat EBV (%)
• Genetic difference in the percentage of intramuscular fat at the 12/13th rib site in a 400 kg carcase.
• Depending on market targets, larger more positive values are generally more favourable.
• Up to a 7.5% range for some breeds
Wagyu only
• Marble Score EBV & Marble Fineness EBV
↑ IMF (marbling)
![Page 14: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/14.jpg)
IMF EBV impact on MSA Index 1% increase in IMF EBV of sire =
27 ± 5 MSA marble point increase in progeny =
~0.43 point increase in MSA index
Marbling is a major driver of quality
![Page 15: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/15.jpg)
Ossification and HSCW
Optimise Growth (reduce Ossification)
↑ Carcass Wt
Within carcass specs
400 and 600-Day Weight EBV (kg)
• These EBVs are the best estimates of an animal's genetic merit for yearling weight and beyond
• Faster growth means less days on feed, earlier turnoff
‒ Younger turn-off ages
‒ Lower ossification
• Or heavier carcass weights
![Page 16: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/16.jpg)
400
450
500
550
600
650
700
450 480 510 540 570 600 630
Wei
ght (
kg)
Age (days)
Effect of sire EBV on steer growth
50 percentile
95 percentile
11 days difference in age at slaughter to reach same weight
Effect of growth on Ossification
![Page 17: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/17.jpg)
Effect of growth on Ossification • Saving of 11 days to get to same weight
• Ossification increases by approximately 10 units in 2 months = 0.17 per day
• 11 days saves 1.9 units of Ossification
• Increases MSA Index by ~0.1 averaged over a mob
![Page 18: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/18.jpg)
Rib Fat Rib Fat and Rump Fat EBVs (mm)
• Genetic differences in fat distribution on a standard 400 kg carcase.
• Sires with low, or negative, fat EBVs are expected to produce leaner progeny at any particular carcase weight than will sires with higher EBVs.
• Fat is a balancing act; ‒ Cow herd needs to be able to maintain condition ‒ Slaughter cattle, what do your kill sheets tell you? ‒ Higher fat is favourably related to EQ ‒ Not so good for lean meat yield
![Page 19: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/19.jpg)
Managing the relationship between RBY & IMF
Above breed average for both
traits
RBY
IMF
![Page 20: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/20.jpg)
EBV
Phenotype Genotype Pedigree
Single Step Analysis
In place for Brahman
Currently being tested for other major breeds
![Page 21: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/21.jpg)
Bottom 5 Sires
EBV = + 25
Top 5 Sires
EBV= +72
600 Day Weight
Expect 23.5 kg
27 kg difference
377 kg 404 kg
Breed Av 2012 born animals 34 kg Round 1 Bin Sires 49 kg
BIN project - Banana R1 Steers
![Page 22: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/22.jpg)
Bottom 5 Sires
EBV = - 1.3
Top 5 Sires
EBV= + 0.4
Rib Fat
BIN project - Barranga R2 Steers
Expect 0.85 mm
1.1 mm
difference 1.1 mm 2.2 mm
Breed Av 2012 born animals - 0.4mm Round 2 Bin Sires – 0.6 mm
![Page 23: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/23.jpg)
Finding animals – http://breedplan.une.edu.au or breed society website.
![Page 24: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/24.jpg)
![Page 25: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/25.jpg)
![Page 26: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/26.jpg)
Percentile Band Table
![Page 27: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/27.jpg)
![Page 28: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/28.jpg)
Take home messages
• Select bulls on the genes they carry (not how fed up they are)
• Identify the traits that drive profit in your business
• MSA index can be influenced by:
– IMF EBV
– 400 & 600 Day Weight EBV
– Rib Fat EBV
![Page 29: The role genetics plays in achieving the perfect MSA Index...↑ Carcass . Wt . Within carcass specs . 400 and 600-Day Weight EBV (kg) • These EBVs are the best estimates of an animal's](https://reader033.vdocument.in/reader033/viewer/2022061001/60b00dbc2c527463cb5a4526/html5/thumbnails/29.jpg)
For more information
• http://breedplan.une.edu.au
• http://tbts.une.edu.au OR http://sbts.une.edu.au
• Tim Emery (TBTS, Roma)
Mobile - 0408 707 155
Email - [email protected]