自交衰退新解  

New Theory of Inbreeding Depression

作　　者：王浩 

机构地区：[1]毕节市农业科学研究所,毕节551700

出　　处：《分子植物育种》2013年第5期630-637,共8页Molecular Plant Breeding

基　　金：贵州省科学技术基金(黔科合J字(2013)2003号)资助

摘　　要：本文在综合基因组学、系统生物学、现代分子生物学最新发展的基础上,提出了遗传物质缺失致使自交衰退新假说。遗传物质缺失致使自交衰退假说认为:由于同源染色体遗传物质存在差异,存在差异的遗传物质在自交后有不存在于自交子代的可能,从而造成自交子代相对于亲本的遗传物质缺失,致使自交子代衰退。本文通过一个实例论证这一假说,并运用这一假说解释三个遗传学现象。最后,比较隐性有害基因纯合致使自交衰退和多基因平衡破坏致使自交衰退学说的错误,并从遗传物质缺失致使自交衰退的角度解析了杂种优势。The hypothesis on deletion of the genetic material causing the inbreeding depression is put forward in the article on the basis of the new progress of the genomics, the system biology, the molecular biology. It is considered that： because the different the genetic material between the homologous chromosomes will not to be in selfed progeny after selfing, making the kinds of genetic material in selfed progeny less than parent, which lead to selfed progeny＇s Inbreeding depression. The hypothesis is confirm by an example, and three genetic phenomena are explained by this hypothesis. Finally, it compare the theories of the homozygous recessive deleterious gene＇s mistakes with destroying the balance of gene＇s mistakes, and the heterosis is analysised by the hypothesis on the deletion of the genetic material.

关 键 词：假说 自交衰退 遗传物质缺失 隐性有害基因纯合 多基因平衡破坏 

分 类 号：S33[农业科学—作物遗传育种]