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选用通过籼粳杂交、籼型育种目标选择以及育性恢复能力测定等手段选育的6个偏籼型早熟恢复系Gmh01、Gmh03、Gmh05、Gmh06、Gm4006、Gme24与2个籼型三系不育系,按照2×6不完全双例杂交试验设计配制遗传材料。采用等位基因的加性-显性遗传模型(AD模型)分析其产量相关性状的遗传效应与杂种优势。结果表明,每穗总粒数和每穗实粒数主要受到基因加性效应的影响;播始历期、主穗长、单株有效穗数和结实率主要受到基因显性效应的影响。杂种一代产量相关性状均具有一定的杂种优势,但因受到等位基因遗传效应的不同而存在程度和方向上的差异。其中,籼粳交偏籼型恢复系Gmh01、Gmh03和Gme24的遗传改良效果显著,综合性状优良,在今后籼粳亚种间杂种优势利用中具有较好的应用前景。
Six advanced indica rice restorer lines Gmh01, Gmh03, Gmh05, Gmh06, Gm4006, Gme24, which were bred by indica-japonica cross selection, indica breeding target selection and fertility restoration ability, Department, according to 2 × 6 incomplete double-crosses hybrid test design and preparation of genetic material. The allelic additive-dominance genetic model (AD model) was used to analyze the genetic effects and heterosis of yield-related traits. The results showed that the total number of grains per panicle and the number of grains per panicle were mainly affected by the additive effect of the gene. The duration of the initiation, the main ear length, the effective panicle per plant and the seed setting rate were mainly affected by the dominant gene effect. Hybrid generation related traits all have certain heterosis, but there are some differences in degree and direction due to the different allelic genetic effects. Among them, indica-japonica hybrid restorer lines Gmh01, Gmh03 and Gme24 have significant genetic improvement effects and good comprehensive characters, and have good application prospects in future heterosis utilization of indica and japonica subspecies.