【摘要】 为选育适应贵州生态条件的重穗型冬小麦新品种,对12个穗粒大小不同的亲本组成的8个组合进行了遗传和相关分析。揭示了7个数量性状广义遗传力的大小依次为;千粒重>株高>穗长>穗粒数>穗粒重>每穗总小穗数>株穗数,组合间有差异。遗传变异系数,以穗粒重、千粒重、穗粒数及株穗数为高,每穗总小穗数最小。F₁7个性状都是倾大亲组合最多;F₂,凡双亲差异小、亲本个体环境变幅小,超亲个体即多;亲本差异大、个体分散度小,超亲本个体就少。对F₁、F₂和亲本各性状之间的关系进行分析,发现穗长、穗粒数、每穗总小穗数与穗粒重之间存在着显著的正相关,表明这3个性状可作为选育重穗型品种的主要参数。更多还原

【Abstract】 In order to select the heavy-spike varieties of winter wheat adapting the ecological environment in Guizhou, the genetics and correlation analysis was made among eight combinations derived from twelve parents with different spike and grain characters. The broad heritabilities of seven quantitative characters were in the order: 1000-grain weight>plant height>spike length> grains per spike > grain weight per spike > spikelets per spike spikes per plant, there were differences among combinations. The genetic variation coefficient was higher in grain weight per spike, 1000-grain weight, grains per spike and spikes per plant, but lowest in spikelets per spike. The seven characters in F1 tended to the parents of greater value. If the differences between the parents or between the environments of parents’ living were smaller, the transgressive individuals would appear more in F2, conversely, would appear fewer. There were significant and positive correlations between grain weight per spike and three characters (spike length, grains per spike and spikelets per spike) in F1, F2 and parents. This suggested that three characters above could be considered as the major parameters for selecting the heavy-spike varieties of winter wheat.更多还原