不同水氮环境条件下小麦氮素含量和氮素利用效率的遗传模型研究

Genetic Model of Nitrogen Concentrations and Nitrogen Utilization Efficiency of Wheat in Different Water and Nitrogen Environment

为了研究不同水氮环境条件下小麦氮素含量和氮素利用效率(NUE)的遗传模型,随机选用8个亲本组配成28个双列杂交组合,在正常和水氮亏缺胁迫两种环境下进行随机区组试验,采用Hayman的分析方法研究了各性状的遗传模型。结果表明,在正常环境下籽粒和茎秆的氮素含量为加性-显性-上位性模型遗传,叶片氮素含量和氮素利用效率为加性-上位性模型遗传。在水氮亏缺胁迫环境条件下,籽粒和叶片氮素含量为加性-显性模型遗传,茎秆氮素含量和氮素利用效率为加性-显性-上位性模型遗传。可见,小麦氮素含量和氮素利用效率的遗传模型在不同的水氮环境中不完全一样。

In order to study the genetic model of nitrogen concentrations and nitrogen utilization efficiency（NUE） of wheat in different water and nitrogen environments, the random blocks experiment in 2 environments for a set of diallel cross of 8 parents was conducfed. The results showed that the total nitrogen concentrations of grain and stem fit additive-dominance-epistasis model, the total nitrogen concentrations of leaf and nitrogen utilization efficiency fit additive-epistasis mode in normal environment; the total nitrogen concentrations of grain and leaf fit additive-dominance model, the total nitrogen concentrations of stem and nitrogen utilization efficiency fit additive-dominance-epistasis mode in intimidate environment. It is thus evident that the genetic models of nitrogen concentrations and nitrogen utilization efficiency of wheat in different water and nitrogen environments were different.