家蚕母种继代繁育交配设计对长期稳定化选择效应的研究  

EVALUATION OF THE EFFECTS OF DIFFERENT MATING DESIGNS ON STABILIZING SELECTION IN SILKWORM ORIGINAL STRAIN MULTIPLICATION

作　　者：张泽[1,2] 鲁成[1,2] 赵邦美 潘荣 曾华明 向仲怀[1,2] 

机构地区：[1]西南农业大学蚕桑学农业部部级重点实验室 [2]四川省蚕种管理总站

出　　处：《西南农业大学学报（自然科学版）》1997年第4期343-348,共6页Journal of Southwest Agricultural University

摘　　要：对家蚕母种继代繁育中的两种交配设计群体近交系数的估测结果表明，每个小系选留３个蛾区并进行循环配对交配，比只选留２个蛾区的同胞交配可以有效地控制小系内近交系数的极度上升。对两种交配设计群体７个世代谱系资料的分析表明，在相同的稳定化选择下，群体近交系数的极度提高对蚕品种的主要经济性状影响不大，但对健康性影响较为明显。如选留３或４个蛾区，并进行循环配对交配，可以有效地控制小系内近交系数的极度上升，从而在不影响主要经济性状的情况下有利于保持品种的健康性。The effects of two mating desings on stabilizing selection were evaluated by a set of pedigree data in silkworm ( Bombyx mori L.) original strain multiplication. Estimation of inbreeding coefficients indicated that new inbreeding for circular pair mating of three batches was much less than full sib mating of two batches. An analysis of a set of pedigree data of 7 geneations showed that under stabilizing selection the two mating designs mentioned above had little effect on the yield traits of the silkworm; however, circular pair mating of three batches was preferable for the maintenance of the health of silkworm varieties because of lower inbreeding rate.

关 键 词：蚕 交配 设计 母种继代 选择 

分 类 号：S882.3[农业科学—特种经济动物饲养]