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依照相对遗传力理论的分析,在杂交亲本的相对遗传力相等,遗传传递关系为和差式时,F1所具遗传性状的平均值等于两亲本同一性状值的算术平均数(AM),在乘积式时则等于两亲本的几何平均数(GM)。回交后所得子代(B1及B2)的性状。在和差式等于轮回亲本性状值的3/4及另一亲本性状值的1/
According to the analysis of relative heritability theory, when the relative heritability of hybrid parents is equal and the relation of heredity transmission is sum-difference, the average value of inheritance trait in F1 is equal to the arithmetic mean (AM) of the same trait value of parents. The formula is then equal to the geometric mean of the parents (GM). The traits of offspring (B1 and B2) obtained after backcrossing. In the sum and difference is equal to the reincarnation trait of 3/4 and the value of the other parent trait 1 /