摘要
以中心产区典型群简单随机抽样的方法,抽样检测65只同羊、63只湖羊的5项体尺、5项形态特征、6项生态特征及10个血液蛋白质结构基因座基因频率,引用国内外相关研究资料。(1)对国内的6个绵羊群体的17项指标进行主成分分析,并根据各群体主成分值进行聚类,结果表明,国内6个绵羊群体被明显分为牧区、农牧交错区的蒙古羊、滩羊和农区的大尾寒羊、小尾寒羊、湖羊、同羊两大类。(2)在10个结构基因座基因频率基础上,计算中亚以东南12个绵羊群体平均座位纯合度和杂合度,比较其遗传多样性,依杂合度的高低分为3类。结果表明:绵羊的4项生态指标、2项形态特征及4项体尺对绵羊品种间差异起决定作用;湖羊、同羊及蒙古羊系统的另两个群体Kh和Ub具丰富的遗传多样性。
Applying method of simple random sampling to typical colony,65 Tong sheep and 63 Hu sheep in their central area of habitat were respectively examined in 5 body measurements,5 morphological and 6 ecological characters and 10 structural gene loci.Related data were quoted.(1)The principal component analyzing of 17 quantity indexes of 6 sheep populations in China were carried out,Hierarchical clustering based on principal component of 6 sheep populations indicated that 6 sheep populations can be classifed in two type,the first included Mongolia sheep(Moy) and Tan sheep(Tay) distributed in husbandry area and juncture of agriculture and husbandry area,the second included Daiweihan sheep(Dwh),Xiaoweihan sheep(Xwh),Tong sheep and Hu sheep distributed in agriculture area.(2)The mean heterozygosity and homozygosity and homozygosity of 12 sheep populations in China and the east and south of central Asia were calculated based on gene frequencies of 10 structural loci.The genetic diversity of 12 sheep populations were compared and 12 sheep populations can be divided into three types based on the level of heterozygosity.The study indicated that 4 ecological and 2 morphological characters and 4 body measurements have dominant effects on differentiation among sheep populations;Hu sheep,Tong sheep and Kh,Ub populations in Mongolia sheep system have abundant genetic diversity.
出处
《西北农业学报》
CAS
CSCD
2004年第2期1-6,共6页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家自然科学基金项目(30070550)
国际合作项目(30213009)资助。
