Analysis of growth and development patterns of Tibetan yellow cattle,Jersey cattle,and their hybrids in plateau regions

SRANG Wangm; TSERING Luob; NIMA Cangju; ZAXI Donzhu; GESANG Zhuga; BASANG Puchi; KAMA Yangchong; KONG Xiaoyan

doi:10.13557/j.cnki.issn1002-2813.2025.08.016

Abstract：This study aimed to investigate the growth and development patterns of Tibetan yellow cattle,Jersey cattle,and hybrid cattle(Jersey cattle♂×Tibetan yellow cattle♀,F2 generation)under the hypoxic plateau environment.Data on body weight and body measurements(1～8 months of age)of Tibetan yellow cattle,plateau-born Jersey cattle,and hybrid cattle were collected and analyzed using four growth curve models:Logistic,Gompertz,Brody,and Von Bertalanffy.The results showed that hybrid cattle exhibited superior body weight and body measurements compared to Tibetan yellow cattle and Jersey cattle at four months of age.As age increased,the growth rate of Jersey cattle surpassed that of Tibetan yellow cattle and hybrid cattle.The optimal fitting models for the growth curves of body weight,body straight length,body height and chest circumference of Tibetan yellow cattle and hybrid cattle were the Brody model and the Logistic model,respectively.The optimal fitting model for the body weight growth of Jersey cattle is the Gompertz model,and all indicators of body size were the Brody model.The estimated body weights of Tibetan yellow cattle,hybrid cattle and Jersey cattle were 202.219,294.232 and 482.779 kg respectively,the estimated body straight lengths were 99.756,131.693 and 146.461 cm respectively,and the estimated body heights were 105.382,127.983 and 116.048 cm respectively.The estimated chest circumference values were 133.779,187.019 and 161.923 cm respectively.The study indicates that the frozen semen of Jersey cattle is introduced to improve Tibetan yellow cattle,which improves the weight and body size indicators of the hybrid offspring,and the effect is good.