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杂种优势是一种十分普遍的生物学现象,很久以来即被厂泛用于农业、畜牧业、园艺及水产等众多的生产领域.尽管杂种优势利用在生产实践中取得了突出的成就,但人们对杂种优势机理的认识却始终停留在一知半解的水平.早在1910年Bruce即已提出显性互补学说用以解释杂种优势形成的原因,其后Shull等又提出超亲优势与显性上位作用理论进一步说明杂种优势产生的遗传机制,但是迄今为止,这些假设与学说大多仍停留在理论模型阶段,未能从实验上加以证实.近年来由于分子生物学的发展,特别是对基因产物比较分析技术——差异展示法(differential display)的问世,为人们从分子水平探明杂种优势形成的机制提供了
Heterosis is a very common biological phenomenon that has long been used extensively in a wide range of fields of production, such as agriculture, livestock husbandry, horticulture and aquaculture. Although the use of heterosis has made outstanding achievements in production practices, The understanding of the mechanism of heterosis has remained at a barely understood level.As early as 1910, Bruce put forward the theory of explicit complementarity to explain the formation of heterosis reasons, then Shull et al proposed super-dominance and dominant epistasis theory Further description of the genetic mechanism of heterosis, but so far these assumptions and theories are still mostly stuck in the theoretical model stage, failed to be verified experimentally.In recent years due to the development of molecular biology, especially the comparative analysis of gene products - The advent of differential display has provided people with a mechanism for exploring the formation of heterosis at the molecular level