南方中国荷斯坦牛耐热性的数量遗传学研究

Study on Quantitative Genetics Of Heat-Tolerance in Chinese Holstein in Southern China

本研究采用公畜内半同胞相关法,分别从产奶量(350头)、耐热产奶量(116头)、直肠温度(200头)和红细胞钾(144头)四个方面估算奶牛群体遗传力,结果分别是0.334、0.196、0.20、0.318.利用SAS8.1版本对数据进行二元回归分析,得到回归方程:y=-0.23853- 0.0096x_1+0.000827x_2(x_1为直肠温度,x_2为红细胞钾含量).运用BLUP法估算公牛育种值,以色列公牛育种值最高,为85.12.

The heritability ill milk yield（350 caput）, heat tolerance milk yield （350 caput）,recta temperature（350 caput） and potassium concentrate of erythrocytes（350 caput）were estimated using half-fellowmen correlation in bull. The results were 0.334, 0.196, 0.20 and 0.318 respectively. Using SASS.1 to analysis the data,got the dualitye linear regression equation mezu： y=-0.23853-0.0096xl＋0.000827x2 （xl as rectal temperature,x2 as potassium concentrate of erythrocytes）.The breeding value of Israel bulls estimated by BLUP method was 85.12 and it is the highest among the bulls.