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用四个六棱大麦品种的三组杂交对出穗期、分蘖数、株高、籽粒产量、粒重和饱、秕粒进行了遗传分析。每个杂交的 P1、P2 、F1、F2 、BC1和 BC2 于 1982年被种植在美国 North Dakota的 Forgo和Prosper两个地方 ,并且给予了评价。除了分蘖数外 ,杂交内亲本平均值一般是不同的。各代之间比较表明 ,晚出穗相对早出穗显性 ;高粒重相对低粒重显性 ;籽粒的饱满度受加性基因作用。产量和出穗期之间的关系在杂交间不一致。正 r值很低 ,由此说明选择早熟、高产、粒饱的大麦系是应该可能的。出穗期超中亲的杂交优势在杂交间很接近 ,但没有超高亲优势。出穗期的自交衰退相当恒定 ,而产量不一致。自交衰退的程度不一致可能与环境变异和基因型不同有关。出穗期和产量的加性方差与显性方差的比例在杂交间不一致。这些资料表明 ,应该在 F2 代以后进行这些性状选择。出穗期广义遗传力在 4 2 %～ 86 %之间变化 ,籽粒产量的广义遗传力的一致性大于其狭义遗传力的一致性。因为缺少加性变异 ,遗传进展值很低。
The genetic analysis of heading date, tiller number, plant height, grain yield, grain weight, and grain weight of three grains of four hexagonal barley cultivars was carried out. P1, P2, F1, F2, BC1 and BC2 of each cross were planted in 1982 in Forgo and Prosper, North Dakota, USA, and evaluated. In addition to the number of tillers, the average of the parents within the cross is generally different. The comparison between generations showed that late ear spike was relatively early spike dominant, high grain weight was relatively low grain weight dominant, and grain fullness was affected by additive gene. The relationship between yield and heading stage is inconsistent among hybrids. Positive r values are very low, indicating that the choice of precocious, high yield, full barley lines should be possible. Heterophile at the heading of the hybrid advantage is very close to the hybridization, but no superior pro-parents. At the heading stage, the decline of self-fertility was fairly constant, while the yield was inconsistent. Inconsistent degree of self-fertility decline may be related to environmental variation and genotype differences. The ratio of additive variance to dominant variance at heading date and yield was inconsistent among hybrids. These data suggest that these traits should be selected after F2 generations. At the heading stage, the general heritability varied from 42% to 86%. The consistency of general heritability of grain yield was greater than the heritability of heritability. Because of the lack of additive variation, genetic progression is low.