家鸡血浆淀粉酶的多态现象

本研究采用水平平板聚丙烯酞胺凝胶电泳法,测定了杏花鸡、石歧杂鸡、粤黄鸡、郑州红鸡、长沙黄 鸡和白来航鸡的血浆淀粉酶。发现各鸡种的AMY-1位点均存在多态现象,还发现在杏花鸡中存在着 控制血浆淀粉酶的另一位点（Amy-2), Amy-2位点上有一对显隐性基因（Amy-2t, Amy-2')。经交 配试验,发现Amy-2位点与Amy-1位点是紧密连锁的,重组率为二。3030     

中国地方鸡种血液淀粉酶Amy-1多态性

本文用聚丙烯酰胺水平凝胶电泳法测定了我国 10个地方鸡种的血液淀粉酶Amy-1多态性,发现我国地方鸡种Amy-1的AA、BB型纯合子基因型频率很低, AB型基因型频率很高,杂合子显著过量,且普遍存在Amy-1分布不平衡。还发现Amy-1A和Amy-1B两个等位基因频率在所有10个鸡种中几乎均为0.5。 Abstract:Blood amylase-1 polymorphism in 10 Chinese native chicken breeds was determined with polyacrylamide horizontal gel electrophoresis.It was found that both AA and BB genotype frequencies were very low,but AB genotype frequency was very high in Chinese native chicken breeds and that amylase-1 distribution in these breeds was widely deviated from Hardy-Weinberg equilibrum proportion.Both Amy-1A and Amy-1B gene frequencies were nearly 0.5 in all 10 breeds.