家蚕突变型浓黑蛹(bp^2)的遗传分析

Genetic Analysis of the Mutation type(bp^2) with Thick Black Color in Silkworm Chrysalis

家蚕浓黑蛹(bp2)发现于家蚕基因库的桂灰卵(GrK)突变基因的保存系统,其蛹体色为黑色,在相同的保护温度下,明显比黑蛹(bp)突变基因的表型浓。经与正常型蛹进行杂交分析表明,浓黑蛹为隐性突变;用家蚕龙角基因(K)系统与其进行连锁分析表明,浓黑蛹与K连锁,仍然属于第11连锁群;用黑蛹(bp)与浓黑蛹进行杂交,后代仍然表现为黑蛹,表明浓黑蛹与黑蛹(bp)为相同基因座的遗传突变。据此将浓黑蛹基因符号命为bp2。

The silkworm chrysalis （bp^2） with thick black color was found, in the maintain system of Kei＇s grey egg （Gr^K） mutant gene of silkworm gene bank, Southwest University. Under the same temperature during the oviposition period, the chrysalis color of （bp^2） is darker than that of（bp）with black color obviously. The F2 segregation of （bp^2） × the chrysalis with normal color indicated that （bp^2） had a recessive mutation gene. The linkage results from the cross of （bp^2） × （k） show that （bp^2） with thick black color is linked with the Knobbed（K）and belongs to the 11 th linkage group; The filial generation of （bp）with black color × （bp^2 ） with thick black color expresses the black color, which indicates that （bp^2 ） is the mutant of （bp）.