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Articles | Volume 59, issue 3
Articles | Volume 59, issue 3
https://doi.org/10.5194/aab-59-387-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/aab-59-387-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 59, issue 3
Original study
 | 
13 Sep 2016
Original study |  | 13 Sep 2016

Genetic analysis of productive life length in Holstein dairy cows using Weibull proportional risk model

Hamed Amirpour Najafabadi, Saeid Ansari Mahyari, Mohammad Ali Edriss, and Eva Strapakova

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Latest update: 14 Dec 2024
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Short summary
This study aimed to use survival analysis and examine the factors affecting functional herd life (FHL) of cows in Isfahan using the Weibull proportional risk model in Isfahan to estimate of breeding values for functional herd life. The SC, milk production, age at first calving and milk period showed significant effects on LPL (P < 0.001) according to the likelihood ratio test. Although there were some fluctuations in genetic trends, an overall increase was observed which leads to a longer FHL
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