玉米主要穗性状GCA和SCA效应值的因子分析

Bulletin of Agricultural Science and Technology（2021）

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Abstract

为明确玉米DH系选择和杂交组合鉴定穗性状的权重,为玉米遗传育种工作提供参考,以79份改良15D969育成DH系(NSS)和3份骨干系(PH6WC、PH2VK、PH6JM,SS)进行NCⅡ遗传交配设计,对GCA和SCA相对效应值进行因子分析.结果表明,穗粒重为DH系选择和杂交组合鉴定的首要因素.实际育种操作中,DH系田间选择应侧重果穗要长、适宜穗行数(≥14)、高粒穗比,从而实现最大穗粒重目标;杂交种田间鉴定应侧重高粒穗比、百粒重要大、果穗要长,从而确保最大穗粒重.

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