Impact of Heat Stress on Milk Yield, Milk Fat-to-Protein Ratio, and Conception Rate in Thai–Holstein Dairy Cattle: A Phenotypic and Genetic Perspective DOI Creative Commons
Wuttigrai Boonkum,

Watcharapong Teawyoneyong,

Vibuntita Chankitisakul

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(20), P. 3026 - 3026

Published: Oct. 19, 2024

Heat stress severely affects dairy cattle production and reproduction performances in tropical regions. Genetic selection to maintain adequate yield reproductive performance while enhancing their ability withstand heat is essential for improving the genetics of cows. Therefore, this study, we aimed estimate genetic parameters affecting under conditions investigate threshold point milk (MY), fat-to-protein ratio (FPR), conception rate (CR) Thai–Holstein cattle. The data included 168,124 records related MY FPR 21,278 CR cattle, covering period from 1990 2007. A multiple-trait threshold-linear random regression model based on a Bayesian approach via Gibbs sampling was used variance components, (heritability values, correlations), decline rates each studied trait. identified as temperature humidity index (THI) 76. At THI76, observed MY, FPR, Thai heritability estimates were 0.347 ± 0.032, 0.293 0.021, 0.032 0.001, respectively. correlation between −0.24 −0.53, respectively, whereas those tolerance well −0.48 −0.49, In addition, found be associated with high percentage Holstein genetics. conclusion, results obtained study reveal that simultaneous consideration CR, traits possible. developing incorporates THI sustainably addressing problems.

Language: Английский

Impact of Heat Stress on Milk Yield, Milk Fat-to-Protein Ratio, and Conception Rate in Thai–Holstein Dairy Cattle: A Phenotypic and Genetic Perspective DOI Creative Commons
Wuttigrai Boonkum,

Watcharapong Teawyoneyong,

Vibuntita Chankitisakul

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(20), P. 3026 - 3026

Published: Oct. 19, 2024

Heat stress severely affects dairy cattle production and reproduction performances in tropical regions. Genetic selection to maintain adequate yield reproductive performance while enhancing their ability withstand heat is essential for improving the genetics of cows. Therefore, this study, we aimed estimate genetic parameters affecting under conditions investigate threshold point milk (MY), fat-to-protein ratio (FPR), conception rate (CR) Thai–Holstein cattle. The data included 168,124 records related MY FPR 21,278 CR cattle, covering period from 1990 2007. A multiple-trait threshold-linear random regression model based on a Bayesian approach via Gibbs sampling was used variance components, (heritability values, correlations), decline rates each studied trait. identified as temperature humidity index (THI) 76. At THI76, observed MY, FPR, Thai heritability estimates were 0.347 ± 0.032, 0.293 0.021, 0.032 0.001, respectively. correlation between −0.24 −0.53, respectively, whereas those tolerance well −0.48 −0.49, In addition, found be associated with high percentage Holstein genetics. conclusion, results obtained study reveal that simultaneous consideration CR, traits possible. developing incorporates THI sustainably addressing problems.

Language: Английский

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