玉米磷效率的主基因+多基因混合遗传分析

The Mixed Inheritance Analysis of Phosphorus Efficiency in Maize

运用主基因+多基因模型分离分析法,对玉米082×掖107组合的磷效率P1、P2、F1、F2和F2:3五世代联合遗传分析.结果表明:玉米磷效率遗传符合一对加性-显性主基因+加性-显性多基因混合模型.F2和F2:3估计的主基因的遗传力分别为61.41%和62.59%,估计的微效多基因遗传力分别为38.60%和37.42%.主基因的遗传力都高于微效多基因,玉米082×掖107组合磷效率的遗传主要由一对加性-显性主基因控制,同时微效基因对玉米磷效率的影响较大.表明可以利用磷效率高的玉米亲本配制杂交组合,并且在育种的早期阶段选育磷效率高的单株或家系,以获得磷效率高的栽培玉米品种.

Inheritance of phosphorus efficiency in F2： 3 families from the cross of 082 ×Ye107 was investigated by the mixed major gene plus poly-gene inheritance model of quantitative traits. The results showed that phosphorus efficiency in the cross was both controlled by a major genes and minor gene （the D-I model）. Heritability value of the major genes for F2 and F2：3 was estimated as 61.41% and 62.59%, while the effects of multi genes was 38.60% and 37.42% in total action, respectively. The value of effects of the major gene were higher than the minor gene. Thus, it is possible to breed high phosphorus efficiency maize cultivars by choosing high phosphorus efficiency parents and handling segregating generation.