双羔滩羊血红蛋白多态性的研究

采用聚丙烯酰胺凝胶电泳技术分析滩羊双羔系和单羔系血红蛋白（Ｈｂ）多态性的差异．结果表明，Ｈｂ位点鉴别出的两个等位基因ＨｂＡ和ＨｂＢ控制着三种表现型（基因型），其中实验组２８只产双羔家系滩羊的基因型频率比对照组的６２只产单羔家系滩羊的基因型频率ＨｂＡＡ低１．２７％，ＨｂＡＢ低９．５６％，ＨｂＢＢ高１０．８３％，而基因频率实验组比对照组的ＨｂＡ低６％，ＨｂＢ高６％，因而两组的基因型频率和基因频率均有差异．

Studies on hemoglobin polymorphism of twins of tan sheep

Using polyacrylamide gel electrophoresis technique, the difference on hemoglobin(Hb) of tan sheep between twins strain and single lamb strain is analysed. The result shows that two alleles, such as Hb A and Hb B, are identified from Hb locus and the alleles control three phenotype (genotype). The experiment shows that 28 twins tan sheep strain control group's genotype frequency is 1.27% lower in HbAA, 9.56% lower in HbAB and 10.83% higher in HbBB than that 62 single lamb tan sheep strain group's perspectively. Also, the former's gene frequency is 6% lower in Hb A and 6% higher in Hb B than the later's. So, there is some difference between two group's genotype and gene frequency.