论文部分内容阅读
杂交优势是杂交有益效应的遗传表现.在理论上,对阐明遗传、进化、繁殖、代谢的机理;在实践上,对提高动植物的生产率都有重大意义.遗传型不同的个体间交配称杂交,其后代比亲本生长健壮,生理机能高和繁殖能力强,以及其他对选择有利的性状都可称做杂种优势.关于植物性别,在国外,卡梅拉里斯(1694)用授粉试验微过证明.大量的植物杂交试验是凯尔路特(1766)进行的,他系统地记录了亲本和它们杂种之间的变异,描述了杂种超过它们亲本的优势,并认识到杂种优势在进化上的意义和生产实践利用的可能性.二十年后
The advantage of hybridization is the genetic expression of the beneficial effects of hybridization.In theory, it is of great significance to clarify the mechanism of genetics, evolution, reproduction and metabolism, and in practice, it is of great significance to improve the productivity of plants and animals. , Whose progeny are more robust than their parents, with high physiological and reproductive abilities, and other traits favorable to selection, can be termed heterotic. Regarding plant sex, in other countries, Carmelaris (1694) A large number of plant hybridization experiments were carried out by Kellert (1766), who systematically documented variability between parents and their hybrids, described the advantages of hybrids over their parents, and realized the evolutionary significance of heterosis And the possibility of using production practices. Twenty years later