宁夏滩羊与四种引进羊种血液蛋白遗传标记特征及聚类分析

Genetic character of Tan sheep's tagged blood protein in Ningxia and other four introduced sheep's and cluster analysis

采用聚丙烯酰胺不连续梯度凝胶电泳法，对宁夏滩羊及4种引进羊种的血清转铁蛋白(Tf)、后白蛋白(Po)、清 蛋白三个位点的蛋白质多态性进行了测定。研究表明：宁夏滩羊与引进羊种的血清转铁蛋白、后白蛋白2个位点的基因 型有所差别，清蛋白位点基因型相同。计算各羊种的基因型频率、基因频率以及宁夏滩羊与引进羊种之间的遗传距离， 对所研究的5个羊种进行了聚类分析。结果表明：宁夏滩羊与陶塞特最近，其次为萨福克、小尾寒羊，与特克萨尔最远。

Three loci （serum transferrin, serum postalbumin,serum albumin） of tan sheep in Ningxia and other four introced sheep were analysed by Poly ac- rylamide gradient gel electrophooresis. The study showes that serum Transferrin （Tf） locus and serum postalbumin（Po） locus have defferences in 5 sheep. Their serum albumin loci are the same. Caoulate every genotype frequency, gene frequency and the genetic distance between 5 sheep. The results showed that compared the genetic distance of Tan sheep in Ningxia to other four sheep,, Dorset was the closest one , Suffolk was the second one , Little tailed hen sheep was third one ,Tesel was the farthest one.