myoglobin and iron in lamb meatmyoglobin and iron in lamb meat …the influence of lamb growth khama...
TRANSCRIPT
![Page 1: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/1.jpg)
Myoglobin and Iron in Lamb Meat
…the influence of lamb growth
Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences, Murdoch University, Western Australia
![Page 2: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/2.jpg)
Why is lamb growth important?
![Page 3: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/3.jpg)
Why is lamb growth important?
$ € zt
![Page 4: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/4.jpg)
Meat Quality Traits
Myoglobin Ξ Meat colour
Myoglobin increases with age (Pethick et al, 2005)
Iron Ξ Nutrition
Source = 10%
Good Source = 25%
![Page 5: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/5.jpg)
Meat Quality Traits
Myoglobin Ξ Meat colour
Myoglobin increases with age (Pethick et al, 2005)
Iron Ξ Nutrition
Source = 10%
Good Source = 25%
![Page 6: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/6.jpg)
Does growth affect meat quality?
Hot carcass weight
Myoglobin 1.56 mg/g tissue (20kg) (Kelman et al, 2014)
Iron 0.23 mg/100g (27kg)
(Pannier et al, 2014)
Lamb growth is linear
Varies with age
![Page 7: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/7.jpg)
Hypothesis
Myoglobin with lamb growth
Iron with lamb growth
The association between lamb growth and myoglobin and iron will vary during different periods of growth (Gardner et al, 2007)
![Page 8: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/8.jpg)
Investigation
Information Nucleus Flock
• Eight sites
• 2007 – 2011
• Maternal, Merino
and Terminal sires
![Page 9: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/9.jpg)
Investigation
Lamb weights
• Birth
• 100 days (weaning)
• 150 days (post weaning)
![Page 10: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/10.jpg)
Investigation
Myoglobin and Iron
• Myoglobin (n=8,987)
• Iron (n=8,434)
![Page 11: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/11.jpg)
Investigation
Statistical Analysis: Linear Mixed Effects Model
Fixed: Site, Year, Birth type-rear type, Dam age,
Sire type, Sex, Dam breed (Sire type),
Kill group (Site*Year)
Random: Sire, Dam*Year
Covariates: Birth weight or Weight at 100 or Weight at 150
![Page 12: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/12.jpg)
Results
Myoglobin
4
5
6
7
8
0 20 40 60 80
Myo
glo
bin
(m
g/g
tis
sue)
Weight 150 days (kg)
1.81
![Page 13: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/13.jpg)
Results
Myoglobin
4
5
6
7
8
0 20 40 60 80
4
5
6
7
8
0 20 40 60 80
Myo
glo
bin
(m
g/g
tis
sue)
Weight 100 days (kg) Weight 150 days (kg)
2.30 1.81
![Page 14: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/14.jpg)
Results
Myoglobin
4
5
6
7
8
0 5 10 15
4
5
6
7
8
0 20 40 60 80
4
5
6
7
8
0 20 40 60 80
Myo
glo
bin
(m
g/g
tis
sue)
Birth weight (kg) Weight 100 days (kg) Weight 150 days (kg)
- 1.22 2.30 1.81
![Page 15: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/15.jpg)
Results
Myoglobin
*Hot carcass weight association 1.56 mg/g tissue
4
5
6
7
8
0 5 10 15
4
5
6
7
8
0 20 40 60 80
4
5
6
7
8
0 20 40 60 80
Myo
glo
bin
(m
g/g
tis
sue)
Birth weight (kg) Weight 100 days (kg) Weight 150 days (kg)
- 1.22 2.30 1.81
![Page 16: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/16.jpg)
Results
Iron
Iro
n (
mg
/10
0g)
Weight 150 days (kg)
0.23
1.5
2
2.5
0 20 40 60 80
![Page 17: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/17.jpg)
Results
Iron
Ir
on
(m
g/1
00
g)
Weight 100 days (kg) Weight 150 days (kg)
0.26 0.23
1.5
2
2.5
0 20 40 60 80
1.5
2
2.5
0 20 40 60 80
![Page 18: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/18.jpg)
Results
Iron
Iro
n (
mg
/10
0g)
Birth weight (kg) Weight 100 days (kg) Weight 150 days (kg)
- 0.25 0.26 0.23
1.5
2
2.5
0 5 10 151.5
2
2.5
0 20 40 60 80
1.5
2
2.5
0 20 40 60 80
![Page 19: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/19.jpg)
Results
Iron
Hot carcass weight association 0.23 mg/100g
Iro
n (
mg
/10
0g)
Birth weight (kg) Weight 100 days (kg) Weight 150 days (kg)
- 0.25 0.26 0.23
1.5
2
2.5
0 5 10 151.5
2
2.5
0 20 40 60 80
1.5
2
2.5
0 20 40 60 80
![Page 20: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/20.jpg)
Hypothesis
Myoglobin with lamb growth
*only after 100 days
Iron with lamb growth
*only after 100 days
The association between lamb growth and myoglobin and iron will vary during different periods of growth
![Page 21: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/21.jpg)
Birth to weaning
Possible mechanisms: Time from slaughter and growth impetus Myoglobin and Iron can be influenced EARLY
4
5
6
7
8
0 5 10 15
4
5
6
7
8
0 20 40 60 80
4
5
6
7
8
0 20 40 60 80
Myo
glo
bin
(m
g/g
tis
sue)
Ir
on
(m
g/1
00
g)
Birth weight (kg) Weight 100 days (kg) Weight 150 days (kg)
1.5
2
2.5
0 5 10 151.5
2
2.5
0 20 40 60 80
1.5
2
2.5
0 20 40 60 80
![Page 22: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/22.jpg)
Future Investigations
Investigation of a greater range of meat traits
Characterise the change in association between birth and weaning and investigate mechanisms
Association after 150 days (e.g. 240)
![Page 23: Myoglobin and Iron in Lamb MeatMyoglobin and Iron in Lamb Meat …the influence of lamb growth Khama Kelman, L. Pannier, D.W. Pethick, G.E. Gardner School of Veterinary and Life Sciences,](https://reader033.vdocuments.net/reader033/viewer/2022042606/5f6d8e35e9b717081038ea1f/html5/thumbnails/23.jpg)
Acknowledgements
EAAP
Sheep Cooperative Research Centre
Murdoch University
Thank you