Sire Effects on Post-Weaning Growth of Beef-Cross-Dairy Cattle: A Case Study in New Zealand
Abstract
:Simple Summary
Abstract
1. Introduction
2. Materials and Methods
2.1. Animals
2.1.1. Beef Sire Selection
2.1.2. Calving and Rearing at the Dairy Farm, before Current Experiment
2.2. Feed Management at the Beef Farm
2.3. Live Weight Measurements
2.4. Statistical Analysis
2.4.1. Data Cleaning
2.4.2. Predicting Live Weights at Specific Age
2.4.3. Contemporary Groups
2.4.4. Statistical Models
3. Results
3.1. Growth Curves of Beef-Cross-Dairy Progeny
3.2. Live Weights by Sire
3.3. Comparison of Progeny Means for Live Weight at Different Ages
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Trait | Angus | Hereford | ||||
---|---|---|---|---|---|---|
n | EBV | EBV Range | n | EBV | EBV Range | |
200d weight (kg) | 37 | 39 ± 10 | (18 to 59) | 40 | 30 ± 7 | (18 to 48) |
400d weight (kg) | 37 | 75 ± 14 | (41 to 110) | 40 | 54 ± 13 | (31 to 79) |
600d weight (kg) | 37 | 96 ± 21 | (49 to 135) | 40 | 73 ± 19 | (35 to 114) |
Age (Days) | n | Progeny Mean LWT (kg) | Sire Effect p-Value |
---|---|---|---|
131 | 1101 | 118.6 ± 3.9 | 0.002 |
200 | 1086 | 159.1 ± 5.5 | <0.001 |
400 | 1069 | 284.2 ± 9.6 | <0.001 |
600 | 1035 | 427.0 ± 13.5 | <0.001 |
800 | 913 | 503.6 ± 15.9 | <0.001 |
Progeny Mean | LWT 131 Days | LWT 200 Days | ||||||
---|---|---|---|---|---|---|---|---|
Intercept | Slope | p-Value | R2 | Intercept | Slope | p-Value | R2 | |
LWT 400d (kg) | 236 ± 33 | 0.4 ± 0.3 | 0.149 | 0.03 | 82 ± 23 | 1.3 ± 0.2 | <0.001 | 0.51 |
LWT 600d (kg) | 333 ± 44 | 0.8 ± 0.4 | 0.035 | 0.06 | 144 ± 30 | 1.8 ± 0.2 | <0.001 | 0.55 |
LWT 800d (kg) | 461 ± 57 | 0.4 ± 0.5 | 0.466 | 0.01 | 296 ± 53 | 1.3 ± 0.3 | <0.001 | 0.18 |
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Martín, N.; Schreurs, N.; Morris, S.; López-Villalobos, N.; McDade, J.; Hickson, R. Sire Effects on Post-Weaning Growth of Beef-Cross-Dairy Cattle: A Case Study in New Zealand. Animals 2020, 10, 2313. https://doi.org/10.3390/ani10122313
Martín N, Schreurs N, Morris S, López-Villalobos N, McDade J, Hickson R. Sire Effects on Post-Weaning Growth of Beef-Cross-Dairy Cattle: A Case Study in New Zealand. Animals. 2020; 10(12):2313. https://doi.org/10.3390/ani10122313
Chicago/Turabian StyleMartín, Natalia, Nicola Schreurs, Stephen Morris, Nicolás López-Villalobos, Julie McDade, and Rebecca Hickson. 2020. "Sire Effects on Post-Weaning Growth of Beef-Cross-Dairy Cattle: A Case Study in New Zealand" Animals 10, no. 12: 2313. https://doi.org/10.3390/ani10122313
APA StyleMartín, N., Schreurs, N., Morris, S., López-Villalobos, N., McDade, J., & Hickson, R. (2020). Sire Effects on Post-Weaning Growth of Beef-Cross-Dairy Cattle: A Case Study in New Zealand. Animals, 10(12), 2313. https://doi.org/10.3390/ani10122313