China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (11): 4105-4114.doi: 10.16431/j.cnki.1671-7236.2021.11.020

• Genetics and Breeding • Previous Articles     Next Articles

Estimation of Genetic Parameters of Body Size and Body Weight in Xinjiang Brown Cattle at Different Growth Stages

XU Lei1, ZHANG Menghua1, WANG Dan1, ZHANG Xiaoxue1, FAN Shoumin3, LIU Jianming3, LIU Jiangwei4, YAN Chengxu5, HUANG Xixia1, WANG Yachun2   

  1. 1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China;
    2. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    3. Yili Animal Science Research Institute, Yining 835000, China;
    4. Urumqi Cattle Farm Xinjiang Brown Cattle Breeding Center, Urumqi 830049, China;
    5. Animal Health Supervision Institute of Xinjiang Uygur Autonomous Region, Urumqi 830000, China
  • Received:2021-05-06 Online:2021-11-20 Published:2021-11-01

Abstract: This study was aimed to construct the genetic parameter estimation model of body size and body weight traits in Xinjiang Brown cattle at different growth stages and estimate the genetic parameters of growth and development traits in Xinjiang Brown cattle, in order to provide a theoretical basis for the determination of breeding target traits and the formulation of comprehensive selection index in Xinjiang Brown cattle. DMU software was used to build multi-trait animal models by taking the body size and body weight data of 2 504 Xinjiang Brown cattle of the progenies of 81 bulls from four Xinjiang Brown Cattle core breeding farms collected from 1983 to 2017 as research materials, taking the body weight, body height, body oblique length and chest circumference at birth, and 6, 12 and 18 months of age as the research objects, and estimate the heritability and genetic correlation of traits by taking field, birth time, birth season and sex as fixed effects, and additive effect and maternal effect as random effects. The results showed that the value of estimated body weight heritability of Xinjiang Brown cattle from birth to 18 months of age was from 0.22 to 0.61, the value of estimated body height heritability was from 0.43 to 0.46, the value of estimated body oblique length heritability was from 0.29 to 0.52, and the value of estimated chest circumference heritability was from 0.35 to 0.61. There were positive genetic correlation and phenotypic correlation among body size and weight traits at the same and different growth stages, the genetic correlation coefficient between different body size and body weight traits at the same growth stage was from 0.11 to 0.92, and the phenotypic correlation coefficient was from 0.05 to 0.92. The genetic correlation coefficient between different body size and body weight traits at different growth stages was from 0.08 to 0.92, and the phenotypic correlation coefficient was from 0.01 to 0.72. The genetic correlation coefficient of body size and body weight traits between 18 months of age and other growth stages were high, both of which belong to middle and high heritability traits. Therefore, in order to further improve the genetic progress of the growth and development traits of Xinjiang Brown cattle, we should pay more attention to body size and body weight at 18 months of age when formulating the comprehensive selection index of Xinjiang Brown cattle.

Key words: Xinjiang Brown cattle; body size; body weight; heritability; genetic correlation

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