新疆褐牛种公牛睾丸周径与体尺、体重指标的相关及回归分析

以新疆天山畜牧生物工程股份有限公司种公牛站出生于2007-2012年604头（次）新疆褐牛种公牛为研究对象,探索了不同月龄睾丸周径的变化规律,分析了睾丸周径与体尺、体重指标间的相关关系.结果表明,新疆褐牛种公牛1~30月龄睾丸周径随月龄的增加呈上升趋势；新疆褐牛种公牛睾丸周径与体高、硬长、软长、胸围、腹围、管围、估测体重的相关系数分别为0.909,0.908,0.902,0.910,0.910,0.896,0.860,经检验7个相关系＋均达到极显著水平（P ＜0.01）.并得到睾丸周径与体高、硬长、软长、胸围、腹围、管围、估测体9的回归方程,相关程度为0.936,相关性强.

Correlation and Regression Analysis on Scrotal Circumference and Body Weight,Body Size Measurements for Xinj iang Brown Herd Bull

In the research,Xinjiang brown herd bull （n=604）were studied,which were come from Xin-jiang Tianshan Animal Husbandry Bio-engineering Company from 2007 to 2012 years.The change law of testicles circumference in different month’s age was explored,and the correlation relationships between testicles circumference and body measurements,weight were analyzed.The result shows that the scrotal circumference of Xinjiang brown herd bull from 1 to 30 month’s age grew with the increase of month’s age;the correlation coefficient about the scrotal circumference of Xinjiang brown herd bull and body height,hard long,soft long,chest circumference,abdominal circumference,cannon circumference,estimated weight respectively are 0.909,0.908,0.902,0.910,0.910,0.896,0.860,all correlation coefficient were highly significant （P 〈0.01）,and the regression equations of multiple linear between scrotal circumference and body height,hard long,soft long,chest circumference,abdominal circumference,cannon circumference,esti-mated weight were obtained,the degree of correlations were 0.936,it is a strong correlation.