鸡蛋淀粉酶多态现象

本研究以聚丙烯酰胺凝胶水平电泳法测定了鸡蛋淀粉多态现象，发现蛋清淀粉酶呈单态，蛋黄淀粉酶呈现多态现象，其表现与血清淀粉酶相似，因而提出了相同的遗传机制假设：即蛋黄淀粉酶多态现象受Ａｍｙ－１和Ａｍｙ－２两个基因座位控制，本试验发现Ａｍｙ－１座位有Ａｍｙ－１＾Ａ和Ａｍｙ－１＾Ｂ两个等位基因，控制ＡＡ，ＡＢ和ＢＢ３种表型；Ａｍｙ－２座位由Ａｍｙ－２＾Ｉ和Ａｍｙ－２＾ｉ两个等位基因决定（＋）和（－）２种表

AMYLASE POLYMORPHISM IN CHlCKEN EGGS

Amylase polymorphism in chicken eggs was determinedwith Polyacrylamide gel elec-trophoresis in this study and monomorphic amylase in egg white and polymorphic amy-lase in egg yolk were found. Amylase Polymorphism in egg yolk was similar to that inserum,on which the same genetic control mechanisni hypothesis as that in serum wasProposed, i. e. ainylase Polymorphism in egg yolix was controlled by Amy-1 and Amy-2loci. In the experiment it was found that AA, AB and BB phenotypes were decided bythe two alleles Amy-1A and Amy-1B on Amy-1 locus and that (+) and (-) phenotypeswere decided by the two alleles Amy-2i and Amy-2i on Amy-2 locus. Based on theabove hypothesis, the phenotypic distribution and gene frequencies of amylase polymor-phism in some chicken breeds and lines were investigated, and significant differencesbetween breeds and few differences between lines were discovered. Significant differencebetween phenotypic distribution and gene frequencies in egg yolk Amy-1 and those inserum Amy-1 was also found when compared Amy-1 Polymorphism in egg yolk withthat in serum.