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一、优势与栽培条件的关系 Shull(1914)提出杂种优势一词,主要是用来表达杂合体特殊的促进作用,如生长发育与生理活性的优势表现。但在近来杂种优势的概念就更为广义了,一般杂种优势是指杂一代在植株的大小、长势、产量、适应性等性状的超亲现象。杂种优势是一个复杂的生物学现象,它在生理、生化、遗传方面均有特殊的表现。据研究,杂种优势是受多基因控制的数量性状,对于质量性状则很少或没有优势的表现。
First, the relationship between strengths and cultural conditions Shull (1914) proposed the term heterosis is mainly used to express the special role of heterozygotes, such as growth and development and physiological activity of the dominant performance. However, in recent times, the concept of heterosis has become more generalized. Generally, heterosis refers to the super-progeny phenomenon in the plant size, growth, yield and adaptability. Heterosis is a complex biological phenomenon, it has special physiological, biochemical and genetic aspects. According to the study, heterosis is a quantitative trait controlled by multiple genes, with little or no indication of quality traits.