合理的选配亲本是玉米杂交种具有最大优势的首要条件,而选配亲本经常使用的原则之一是双亲遗传差异大,如何确定其差异,多年来,一些人认为地理远缘是遗传差异的主要标志。因此主张用地理远缘作为选配亲本的条件之一。但据Moll.R.W.et al(1962)及Bhatt,G.M.(1970)等人的研究,发现地理分布和遗传差异并无直接的联系。毛盛贤等 Reasonable matching parent is the most important prerequisite for maize hybrids, and one of the most frequently used principle of matching parents is that parents have great genetic differences and how to determine their differences. Over the years, some people think that geographic distantness is a genetic difference The main symbol. Therefore, advocating the use of geographical distance as one of the conditions of matching parents. However, according to studies by Moll.R.W. et al (1962) and Bhatt, G.M. (1970), etc., there is no direct correlation between geographical distribution and genetic differences. Mao Shengxian and so on