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作者	单位
王军，李洪涛，迟铭，张灿宏，吕超，黄祖六，许如根	(1.江苏省连云港市农业科学院，江苏连云港 222006 2.扬州大学江苏省作物遗传生理重点实验室／扬州大学大麦研究所，江苏扬州 225009)

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中文摘要:

为给啤酒大麦高产育种提供参考依据，选用7个株高构成指数存在一定差异的啤酒大麦品种（系），连续两年按照Griffing双列杂交方法II配制21个杂交组合，对大麦株高构成指数的遗传特性及其与产量性状的相关性进行分析。结果表明,株高构成指数I_L、I₁、I₂、I₃、I₄在基因型间差异达到极显著水平，在年份间和年份×基因型互作间只有I₄存在显著的差异；7个大麦亲本和21个杂种F₁的株高构成指数的平均值均接近黄金分割值0.618；株高构成指数I_L、I₁、I₄的遗传符合加性显性模型，以加性效应为主，显性程度I_L和I₁为部分显性，I₄为完全显性至部分显性，具有较高的狭义遗传力；I₂和I₃遗传符合加性显性上位性模型；控制I_L和I₄的减效等位基因为显性，控制I₁的增效等位基因为显性；株高构成指数可能受1对或2对主基因控制。相关分析表明株高构成指数与株高和千粒重均无显著相关，I₂与穗长呈显著正相关， I_L、I₁与穗粒数呈显著正相关，I₁与籽粒产量呈显著正相关。

英文摘要:

To provide the basis for improvement of yield potential in malty barley, the inheritance of plant height component indexes and their correlation with yield component related traits were investigated. The 21 hybrids with 7 barley parents with different plant height component index made with Griffing diallel cross design II were utilized during 2012-2013 growing seasons. The results showed that there were significant differences in the plant height component index among genotypes at 0.01 level, while only I₄ showed significant differences among years, and interactions between genotypes and years at 0.05 level. The plant height component index was closed to “golden section” value of 0.618. Genetic models for I_L, I₁, I₄ were found to be additive and dominance, and the additive effect was responsible for the heredity of each index. The I_L and I₁ was partly dominance, and the genetic model for I₄ was between partial dominance and complete dominance, with higher narrow sense heritability. The genetic models for I_L, I₁ and I₄ were found to be additive dominance epistasis. The alleles with decreasing effect controlling I_L and I₄ were dominant, while the alleles with increasing effect controlling I₁ were dominant. There was no significant correlation existed between plant height component index with plant height or 1000 grain weight, and I₂ was positively correlated with panicle length,I_L and I₁ were positively correlated with kernelsper spike, and I₁ was positively correlated with grain yield.

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