Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (7): 1177-1183.DOI: 10.3969/j.issn.1004-1524.2021.07.03

• Animal Science • Previous Articles     Next Articles

Correlation and regression analysis on body mass and body size index of Xinjiang brown cattle

LI Tao1(), ZHANG Mei2, LIU Jianming1,*(), CHU Hongzhong1, CHEN Chunhua1, YANG Guangwei1, TUAN Yong1, QIU Meiyu3   

  1. 1. Yili Animal Husbandry Science Research Institute, Yining 835000, China
    2. Yili Vocational and Technical College, Yining 835000, China
    3. Institute of Biotechnology, Xinjiang Academy of Animal Husbandry, Urumqi 830001, China
  • Received:2020-07-08 Online:2021-07-25 Published:2021-08-06
  • Contact: LIU Jianming

Abstract:

The experiment was conducted to explore correlation between body mass and body size and constructed regression equation for different growth stages in Xinjiang brown cattle, so as to provide an effective and direct method for Xinjiang brown cattle breeding. Four individual size indexes and body weight in 4 growth stages(6 months, 12 months, 18 months and 24 months) of Xinjiang brown cattle were measured and the correlation analysis and stepwise linearity regression analysis were performed in Yili area. There was a significant correlation between body weight and body size for different growth stages of Xinjiang brown cattle (P<0.01), the correlation between body size indexes and body weight was higher than others growth stage at 12 months old, and other body size indexes also showed a significant correlation(P <0.01).By the regression models estimating body mass for different growth stages of Xinjiang brown cattle, the optimal regression equations and the coefficients were 0.60, 0.63, 0.55 and 0.44, which indicated that there was a significant linear relationship between body weight and body size index in each stage. The correlation and regression analysis had constructed 4 linear regression equations for different growth stages of body mass and body weight, which was of great significance to Xinjiang brown cattle breeding in practice.

Key words: Xinjiang brown cattle, body mass, body size, correlation, stepwise linear regression

CLC Number: