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为阐明水稻穗部性状的遗传,利用主基因+多基因混合遗传模型对水稻直立穗品种3012与弯曲穗品种万特大粒杂交组合的P1、P2、F1和F2的穗角和着粒密度及每穗颖花数的遗传进行了分析。结果表明,穗角和每穗颖花数性状的遗传均受1对加性-显性主基因+加性-显性-上位性多基因共同控制,着粒密度性状的遗传受2对加性-显性-上位性主基因+加性-显性-上位性多基因共同控制。穗型弯曲对直立、着粒密度密对疏和每穗颖花数多对少均为部分显性。穗角和着粒密度以主基因遗传为主,每穗颖花数以多基因遗传为主,穗角和每穗颖花数的加性效应和显性效应同等重要,而着粒密度以加性效应为主。
In order to elucidate the inheritance of panicle traits in rice, the major gene plus polygene mixed genetic model was used to study the relationship between the panicles and grain densities of P1, P2, F1 and F2 in a panicle hybrid rice combination 3012 with a curved panicle Spike spike number of genetic analysis. The results showed that the inheritance of spikelet and spikelet number per spike was controlled by one pair of additive - dominance major genes + additive - dominance - epistatic polygenes. The inheritance of grain - density traits was affected by two pairs of additive - Dominant - Epistatic Gene + Additive - Dominant - Epitope Multiple Genes Common Control. Spike bending to upright, grain density close to the sparse and spikelet per spike number of less are part of the dominant. Spikelet and grain density were dominated by major genes. The number of spikelets per spike was dominated by polygenes, and the additive effects and dominant effects of spikelet and spikelet number per spike were equally important. Sex-based.