ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (4): 712-720.doi: 10.11843/j.issn.0366-6964.2019.04.004

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Genetic Analysis for Temperament of Chinese Holstein in Beijing Area

CHANG Yao1, LI Xiang1, ZHANG Hailiang1, QI Jiangang1, GUO Gang2, LIU Lin3, WANG Yachun1*   

  1. 1. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    2. Beijing Sunlon Livestock Development Company Limited, Beijing 100029, China;
    3. Beijing Dairy Cattle Center, Beijing 100192, China
  • Received:2018-11-19 Online:2019-04-23 Published:2019-04-23

Abstract:

The aim of this study was to explore the factors affecting temperament of Chinese Holstein, estimate the variance component and genetic parameters, and reveal its genetic trend. The temperament score (TS) of 9 016 healthy lactating cows from 13 herds were collected from 2015 to 2017 in Beijing. Logistic model was used to analyze the factors affecting temperament, the animal model and DMU software were employed to estimate heritability of TS, rectal temperature(RT), daily milk yield(DMY) and reproductive traits(interval from calving to first service(ICF) and number of services(NS)) and genetic correlation between these traits. Genetic trends were analyzed according to the estimated breeding value. The results showed that the proportion of TS as 1, 2 and 3 in Chinese Holstein herds in Beijing area were 75.00%, 19.25% and 5.75%, respectively; The parity and farm-scorer had significant impact on TS (P<0.05); Estimated heritability of TS was 0.03, which defining TS as a low inheritable trait. The genetic correlation of TS with NS was moderate(r=0.56), with ICF and RT were negative and moderate (r=-0.30, r=-0.17, respectively), however, there was a low genetic correlation between TS and DMY (r=0.07); In general, no obvious change was evidenced for the genetic trend of temperament from 2001 to 2017. It is the first report to evaluate genetic parameters of temperament in Chinese Holstein. The results could provide theoretical basis for understanding the behavior characteristics of Chinese Holstein and facilitate future balanced breeding.

Key words: Chinese Holstein, temperament score, heritability, genetic correlation, breeding value

CLC Number: