1. Lean Meat Yield Where the $$$$ are! Graham Gardner

2. Outline Who won the bone-out comp! … and a few details about the carcases…

3. Greg boned-out 6 Carcases!

5. The leaner ones had less fat…

7. The leaner ones had more muscle!

9. Lean animals have more muscle

10. Lean meat yield % is higher ÷

11. 18kg Heavier = less lean meat yield%

12. So if they’ve got more muscle... Shouldn’t they be worth more???

14. The leaner ones are worth more!

15. $33!!

16. So is GR tissue depth the best indicator of lean meat yield %?

17. GR didn’t predict this! Remember this!

18. +150g GR didn’t predict this!

19. Lean animals have more muscle

20. Does palpated GR predict lean meat yield %?

21. R 2 =0.087; RMSE=2.67 Palpated GR and HSCW

22. Would more accurate measures help predict lean meat yield %?

23. Knife GR & HSCW R 2 =0.30; RMSE=2.34

24. C-site Fat, EMA & HSCW R 2 =0.40; RMSE=2.16

25. Already in Australia! VIAscan Lean Meat Yield Total Fat % GR based Fat Score Primal Size Primal Weight

26. VIAscan predicts lean meat yield R 2 =0.45; RMSE=2.30

27. Future measurement tech? Eye muscle Ultrasound 2D X-Ray Fat-o-meter Devices for yield measurement Developing yield measurement devices DEXA

28. CAT scanning For calibration

29. Knowledge of yield means precision management! $273

30. The leaner ones are worth more! $273

31. Conclusion Leanness = better retail value $$$$$$$$$$$$$$$$$$ … if you can predict it, you can fix it…

32. But what about the retail yield competition!

33. The leaner ones are worth more! Heather Dalla $210 Ewin Price $196 Ruth Corrigan $235 Greg Smeather $268 Michael Blake $303 Tony Hamilton $281

38. Fatter Animals have less lean meat yield %

40. Need the Information Nucleus Flock/CRC technology to develop: – Large amounts of data – Calibration – Boning decisions – Feedback Not a trivial job What’s next?

41. Can we improve it through the supply chain? Suppliers can select for yield

42. Key terminal sire traits - Sheep Let’s focus here! For carcase improvement… Growth (PWWT) Reduced fat depth (PFAT) Eye muscle depth (PEMD)

43. PWWT ASBV

44. PWWT

45. Carcase Weight PWWT – They’re heavier!

46. So which ASBV delivers yield? Lean Meat Yield Heritability = 0.39

47. ASBV effects: PWWT FatLean Bone Females +3.3% +3.0%+7% -2.5% +16.5% -7.3%

48. ASBV effects: PEMD FatLean Bone -7.4%+3.6% +4.9 - 4.8

49. 49 PEMD – increases loin wt Loin Weight Δ 7.3%

50. 50 PEMD – increases loin wt Loin Weight Δ 7.3% Round Wt +0% Topside Wt +0% Loin Wt +7.3% GR tissue depth +5.4% C-site Fat depth -14% Shortloin Fat Wt 0% 5 th Rib Fat depth 0%

51. ASBV effects: PFAT FatLean Bone -13.7%+4.6%+5.4%

52. 52 PFAT – increases muscle wt Loin Weight + 6% GR tissue depth -17% C-site Fat depth -25% Shortloin Fat Wt -9% 5 th Rib Fat depth -18% Round Wt +3.5% Topside Wt +0% Loin Wt +6%

53. Carcase Traits Summary! Growth (PWWT) - For heavier carcase Reduced fat depth (PFAT) - For leaner carcase Eye muscle depth (PEMD) - For more muscle where you need it!

54. Key terminal sire traits - Sheep Growth (PWWT) - For heavier carcase Reduced fat depth (PFAT) - For leaner carcase Eye muscle depth (PEMD) - For more muscle where you need it! But how do we combine them?

55. Meat Index Carcase Plus Index 60% focus on increasing growth 20% focus on reducing fatness 20% focus on increasing muscling

56. Carcase plus FatLean Bone Females +5.9% - 10.3% +8.3% +6.4% +7.3% - 4.9%- 5.3% +9.2%

57. 100 sires/dams, range of production systems – 5 years