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分化变异导致等位基因结构和功能强弱的差异,杂合子功能大小可认为是等位基因功能大小的平均值。性状形成的生命反应链,需要分工协作的基因产物在不同环节参与生命反应,性状表现与各基因的功能大小有关,各环节的效率相乘决定性状的表现。数学原理x/x’+x’/x﹥2(x≠x’,x、x’﹥0)可能是形成杂种优势的基本动力。假设某一性状由2个步骤形成,分别由1个基因控制,当2个亲本表现相同、等位基因功能强弱存在差异时,依据以上数学原理,不考虑其它影响因素,杂种F1该性状的表现必然超过亲本。由n个基因控制的n个步骤完成的性状会有同样的表现。当2个亲本性状不同时,杂种可能超亲或负超亲,亲本性状表现都好时,超亲的几率较高。在形成性状的生命反应链中,如果有2个或以上基因存在超亲效应,其他相关基因即使没有差别,该性状也可能超亲。
Differentiation and variation lead to differences in the structure and function of alleles. The size of heterozygous functions can be considered as the average value of allele function size. Traits of life formed by the reaction chain, the need for collaboration in the division of gene products involved in different aspects of life reaction, the performance of genes and the size of the function of each gene, the efficiency of various links determine the performance of traits. The mathematical principle x / x ’+ x’ / x> 2 (x ≠ x ’, x, x’> 0) may be the basic motivation for the formation of heterosis. Suppose a trait formed by two steps, respectively, by a gene control, when the two parents showed the same, there are differences in the function of the allele, based on the above mathematical principles, regardless of other factors, F1 hybrid F1 traits The performance must exceed the parent. Traits performed by n steps controlled by n genes have the same behavior. When the two parents have different traits, the hybrids may be super-progeny or negative super-progenitors, and when the parental traits are good, the chance of super-progeny will be higher. If two or more genes have super-progeny in the life-reaction chain that forms the trait, the trait may also be super-relative even if there is no difference in other related genes.