群体融合对平均适应力的影响  

Influence of Population Fusion on Fitness

作　　者：王身立[1] 戴君惕[2] 

机构地区：[1]湖南师范大学生命科学学院遗传及发育生物学系,中国长沙410081 [2]湖南农业大学杂交小麦研究所,中国长沙410128

出　　处：《湖南师范大学自然科学学报》2000年第1期53-56,共4页Journal of Natural Science of Hunan Normal University

基　　金：湖南省教委资助项目!(1489)

摘　　要：探讨了群体融合对平均适应力的影响 .显性完全且选择不利于纯合子aa时 ,无论常染色体遗传或伴性遗传 ,群体融合均导致平均适应力上升 .显性完全且选择不利于AA和Aa时 ,群体融合在常染色体遗传时导致平均适应力下降 ,而伴性遗传时导致平均适应力上升 .无显性且为常染色体遗传时 ,群体融合对平均适应力无影响 ,而伴性遗传时导致平均适应力下降 .超显性且为常染色体遗传时 ,群体融合导致平均适应力上升 ,伴性遗传时也导致平均适应力上升 .Effect of population fusion on fitness was explored. When dominance is complete and selection is not favourable to homozygote aa, the fitness is greater after fusion than that before fusion, whether in autosome or in sex linded inheritance. When dominance is complete and selection is not favourable to AA and Aa, the fitness is smaller after fusion than that before fusion in autosome inheritance and greater in sex linked inheritance. In non dominance, i. e. when selcetion is not favourable to Aa and aa, the fitness is smaller after fusion than that before fusion in sex linded inheritance and no change in autosome inheritance. In overdominance, i. e. when selection is not favourable to homozygote AA and aa but is farourable to heterozygote Aa, the fitness is greater after fusion than that before fusion in autosome inheritance and in sex linked inheritance.

关 键 词：群体遗传学 群体融合 适应力 

分 类 号：Q75[生物学—分子生物学]