白毛黑眼兔黑眼性状的遗传模式

Genetic patterns of iris pigment mutation in WHBE rabbits

目的揭示白毛黑眼兔黑眼性状的遗传模式。方法选取具有黑眼突变性状的白毛黑眼兔与其背景品系日本大耳白兔进行杂交,构建6个两代杂交家系。对杂交产生的F1代和F2代个体虹膜颜色性状的观察和统计,并应用遗传数理统计方法中常用的分离分析进行遗传模式探讨。结果χ2检验显示,杂交实验所得虹膜颜色分布的观察值与常染色体单基因显性遗传模式的期望值差异无显著性(P>0.05),与常染色体隐性遗传及伴性遗传模式的期望值差异有显著性(P<0.05)。结论白毛黑眼兔的黑眼突变是由常染色体上单个基因的变异造成的显性性状。

Objective To investigate the genetic patterns of iris pigmentat mutation in the white hair black eye （WHBE） rabbits. Methods To construct six two-generation families between WHBE rabbit and Japanese white rabbit, and the quantity of individuals bad different eye colours in F1 and F2 generations were recorded and analyzed. Results X2 test showed there was no significant difference between observed values and expected values in the mode of autosomal domi- nate inheritance （P 〉 0. 05）, while there were significant differences between observed values and expected values in the autosomal recessive inheritance and sex-linked genetic pattern （P〈 0. 05）. Conclusions Iris pigmentat mutation in W tt BE rabbit has a monogenic character due to autosomal dominant mutation.