家畜生态学报2024，Vol.45Issue(5)：8-12,5.DOI:10.3969/j.issn.1673-1182.2024.05.002
宁夏固原地区秦川牛杂交改良效果研究及通径分析
Research on Crossbreeding Effect and Path Analysis of Qinchuan Cattle in Guyuan Ningxia
摘要
Abstract
In this study,the effects of crossbreeding of Angus cattle to improve Qinchuan cattle were investigated,taking the adult female Anqin cattle(Angus ♂× Qinchuan ♀)and female Qinchuan cattle as research object.Its body weight was evaluated by body size traits,and the effects of body size traits on body weight of Qinchuan cattle and Angus cattle were analyzed.Data of five body size of 47 female Anqin cattle and 152 adult female Qinchuan cattle were collected,including height at withers,body length,heart girth,hip width,pin bone width,and their weight were also measured.Multiple linear regression equations were established by stepwise multiple linear regression.Then the direct and indirect effects of each body size on weight were calculated by path analysis.The results suggested that Anqin female cattle outper-forms Qinchuan female cattle in three indicators of weight,heart girth and pin bone width(P＜0.01);compared with Qinchuan female cattle,Anqin female cattle's weight,pin bone width,heart girth and hip-width increased by 13.0％,9.9％,3.5％and 3.3％respectively.The multiple linear regression equations of Anqin and Qinchuan female cattle weight and body size are respectively Y=-912.849+4.899X1+3.866X3 and Y=-718.128+1.881X2+2.995X3+4.386X4+5.057X5(Y is body weight(kg),X1 is height at withers(cm),X2 is body length(cm),X3 is heart girth(cm),X4 is hip width(cm),X5 is pin bone width(cm));the direct effect of bust on body weight is greater than the direct effect of other body size traits.In conclu-sion,Angus cattle has a significant effect on Qinchuan cattle hybridization,and the multiple linear regres-sion equations can be used for selective breeding in Anqin and Qinchuan female cattle,and the dominant factor of impacting the weight of Anqin female cattle and Qinchuan female cattle is the heart girth.关键词
秦川牛/安秦牛/杂交改良/通径分析Key words
Qinchuan cattle/Anqin cattle/crossbreeding and improving/path analysis分类
农业科技引用本文复制引用
王思虎,梅楚刚,谢建亮,张国坪,李毓华,成功,赵春平,昝林森..宁夏固原地区秦川牛杂交改良效果研究及通径分析[J].家畜生态学报,2024,45(5):8-12,5.基金项目
国家重点研发计划(2018YFD0501700),国家肉牛耗牛产业技术体系(CARS-37),宁夏回族自治区重点研发计划重大(重点)项目(2019BEF02004) （2018YFD0501700）
