Estimation of genetic and non‐genetic effects on productive life of Iranian Holstein dairy cows

Understanding the factors that influence the lifespan of dairy cows is crucial for enhancing their productive life (PL). This study aimed to investigate the impact of genetic and environmental effects on the PL of Holstein cows. Data included 82,505 cows from 1952 sires that calved for the first tim...

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Veröffentlicht in:	Animal science journal 2024-01, Vol.95 (1), p.e70010-n/a
Hauptverfasser:	Reisi‐Vanani, Reza, Ansari‐Mahyari, Saeid, Pakdel, Abbas, Cue, Roger I.
Format:	Artikel
Sprache:	eng
Schlagworte:	Age Factors Animals Breeding Brittleness Cattle Cattle - genetics Cattle - physiology Cold season Culling Dairy cattle dairy cows Dairying Economics Environmental effects Female Genetic effects Heritability Holstein Iran Lactation - genetics Life span Longevity - genetics Male Milk Milk - metabolism piecewise productive life Proportional Hazards Models Reproduction - genetics Seasons Statistical models survival analysis Time dependence Weibull baseline Weibull distribution
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