ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (2): 280-286.doi: 10.11843/j.issn.0366-6964.2019.02.006

Previous Articles     Next Articles

Estimation of Genetic Parameters of Reproductive Diseases within 0-35 Days after Calving in Chinese Holsteins

DONG Yixin1, LI Xiang1, QI Jiangang1, LUO Hanpeng1, DOU Jinhuan1, LIU Lin2, LI Xizhi3, WANG Yachun1*   

  1. 1. Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing 100193, China;
    2. Beijing Dairy Cattle Center, Beijing 100192, China;
    3. Beijing Sunlon Animal Husbandry Development Co. Ltd., Beijing 100029, China
  • Received:2018-07-23 Online:2019-02-23 Published:2019-02-23

Abstract:

The aim of this study was to estimate the genetic parameters of reproductive diseases within 0-35 days after calving in Chinese Holsteins. Twenty five thousand and twenty-six reproductive diseases records within 0-35 days after calving from 27 farms from 1993 to 2017 were collected, threshold model and linear model were adopted to estimate the genetic parameters. Farm-year, parity and calving season were considered as fixed effects, additive genetic effect and permanent environmental effect as random effect to explore the genetic regularity of reproductive diseases within 0-35 days after calving in Chinese Holsteins. The genetic parameters of uterine diseases were estimated using the same model. The results showed that 54% reproductive diseases records of dairy cows happened within 0-35 days after calving comparing to total reproductive diseases records in the whole lactation. The estimated heritabilities of reproductive diseases within 0-35 days after calving using linear model and threshold model were 0.015 2(0.001 9) and 0.094 4(0.01), respectively. The rank correlation of estimated breeding value (EBV) derived from the two models for reproductive diseases was 95% (P<0.01). Uterine diseases accounted for 48% of reproductive diseases and mainly occurred during 0-35 days after calving, and the estimated heritability of uterine diseases within 0-35 days after calving by linear model was 0.010 7(0.001 6). There was a decrease tendency of EBV both male and female since 2000 based on the results of linear model. The study may provide a reference for the genetic selection and breeding for reproductive diseases in Chinese Holsteins.

CLC Number: