lean meat yield where the $$$$ are! graham gardner

Lean Meat Yield

Where the $$$$ are! Graham Gardner

Outline

• Who won the bone-out comp!

• … and a few details about the carcases…

Greg boned-out 6 Carcases!

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Fat s

core

Hot Carcase Weight (kg)

Leaner CarcasesFatter Carcases

Greg boned-out 6 Carcases!

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GR

Tiss

ue D

epth

(m

m)



The leaner ones had less fat…

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Fat T

rim

Wei

ght

(kg)



The leaner ones had more muscle!

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Mus

cle

Wei

ght

(kg)



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Mus

cle

Wei

ght

(kg)

Carcase Weight (kg)

GR >15mm

GR <10mm

Lean animals have more muscle

Lean meat yield % is higher

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Lean

Mea

t Yie

ld %



÷

10 15 20 25 30 35 4050

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54

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62

64

66

68

70


%C

T L

ean

28kg

Lose 2.5% lean18kg

Heavier = less lean meat yield%

So if they’ve got more muscle...

Shouldn’t they be worth more???

The leaner ones are worth more!

$185

$205

$225

$245

$265

$285

$305

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Carc

ase

Reta

il Va

lue

($)




$185

$205

$225

$245

$265

$285

$305

17 19 21 23 25 27 29

Carc

ase

Reta

il Va

lue

($)



$33!!

So is GR tissue depth the best indicator of

lean meat yield %?

GR didn’t predict this!

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Mus

cle

Wei

ght

(kg)



Remember this!

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Mus

cle

Wei

ght

(kg)



+150g

GR didn’t predict this!

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19 20 21 22 23 24 25 26

Mus

cle

Wei

ght

(kg)

Carcase Weight (kg)

GR >15mm

GR <10mm

Lean animals have more muscle

Does palpated GR predictlean meat yield %?

R2=0.087; RMSE=2.67

Palpated GR and HSCW

Would more accurate measures help predict

lean meat yield %?

Knife GR & HSCWR2=0.30; RMSE=2.34

C-site Fat, EMA & HSCWR2=0.40; RMSE=2.16

Already in Australia!

VIAscan• Lean Meat Yield• Total Fat %• GR based Fat Score• Primal Size• Primal Weight

VIAscan predicts lean meat yield

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VIAScan Lean Meat Yield (%)

Bo

ne

rs L

ea

n M

ea

t Y

ield

(%

)

R2=0.45; RMSE=2.30

Future measurement tech?Eye

muscle

Ultrasound

2D X-Ray

Fat-o-meter

Devices for yield measurement

Devices for yield measurement

Developing yield measurement devices

DEXA

CAT scanning For calibration

Knowledge of yield means precision management!

$273


$185

$205

$225

$245

$265

$285

$305

17 19 21 23 25 27 29

Carc

ase

Reta

il Va

lue

($)



$273

Conclusion

• Leanness = better retail value

$$$$$$$$$$$$$$$$$$

• … if you can predict it, you can fix it…

But what about the retail yield competition!


$185

$205

$225

$245

$265

$285

$305

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Carc

ase

Reta

il Va

lue

($)



Heather Dalla $210

Ewin Price $196

Ruth Corrigan $235

Greg Smeather $268

Michael Blake $303

Tony Hamilton $281

y = -0.4217x + 63.14745

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Perc

ent M

uscl

e (%

)

GR Tissue Depth (mm)

Fatter Animals have less lean meat yield %

Need the Information Nucleus Flock/CRC technology to develop:

– Large amounts of data– Calibration– Boning decisions– Feedback

Not a trivial job

What’s next?

Can we improve it through the supply

chain?Suppliers can select for yield

Key terminal sire traits - Sheep

Let’s focus here!

For carcase improvement…

• Growth (PWWT)• Reduced fat depth (PFAT)• Eye muscle depth (PEMD)

PWWT ASBV

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-5 0 5 10 15 20

Ho

t C

arc

as

e W

t (k

g)

-S

ire E

sti

mate

Sire PWWT-ASBV

Merino Maternal Terminal

Carcase Weight

PWWT – They’re heavier!

So which ASBV delivers yield?

Lean Meat Yield Heritability = 0.39

ASBV effects: PWWTFat Lean Bone

Females +3.3%

+3.0% +7%

-2.5%

+16.5%

-7.3%

ASBV effects: PEMD Fat Lean Bone

-7.4% +3.6%

+4.9

- 4.8

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390

-2.5 -1.5 -0.5 0.5 1.5 2.5 3.5 4.5

Ey

e o

f S

ho

rtlo

in W

eig

ht

(g)

-S

ire E

sti

mate

Sire PEMD-ASBV


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PEMD – increases loin wtLoin

Weight

Δ 7.3%

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390

-2.5 -1.5 -0.5 0.5 1.5 2.5 3.5 4.5

Ey

e o

f S

ho

rtlo

in W

eig

ht

(g)

-S

ire E

sti

mate

Sire PEMD-ASBV


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PEMD – increases loin wtLoin

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%

5th Rib Fat depth 0%

ASBV effects: PFATFat Lean Bone

-13.7% +4.6% +5.4%

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-3 -2 -1 0 1 2

Ey

e o

f S

ho

rtlo

in W

eig

ht

(g)

-Sir

e E

sti

mate

Sire PFAT-ASBV


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PFAT – increases muscle wtLoin

Weight

+ 6%GR tissue depth -17%

C-site Fat depth -25%

Shortloin Fat Wt -9%

5th Rib Fat depth -18%

Round Wt +3.5%

Topside Wt +0%

Loin Wt +6%

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!

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?

Meat Index

Carcase Plus Index

60% focus on increasing growth

20% focus on reducing fatness

20% focus on increasing muscling

Carcase plusFat Lean Bone

Females +5.9%- 10.3%

+8.3%

+6.4%

+7.3%

- 4.9% - 5.3%

+9.2%

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

lean meat yield where the $$$$ are! graham gardner

Documents

yield slide

fat slide

muscle slide

pwwt slide

hscw slide

calibration slide

higher slide

pwwt asbv slide