我国自50年代初期学习苏联的良种繁育技术,开始了对棉花品种退化的研究工作.当时,苏联学者认为,棉花的群体产量和品质逐年下降,即棉种退化的主要原因是棉株的生活力衰退.因而提倡采用异地父本和本地母本进行同品种人工杂交,借以扩大双亲性细胞的差异,增加合子的内在矛盾,从而恢复和增强生活力。这种观点是一种笼统的概念化的认识,它没有 At the time, Soviet scholars believed that the output and quality of cotton groups declined year by year, that is, the main reason for cotton degeneration was the viability of cotton plants Recession.Thus advocating the use of offspring of male and local female parent breeds artificial hybridization, in order to expand the differences in amphipathic cells, increase the intrinsic contradictions Zizi, so as to restore and enhance vitality. This view is a generalized conceptualization, it does not