双羔滩羊血红蛋白多态性的研究

Studies on hemoglobin polymorphism of twins of tan sheep

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．

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.