【摘要】 采用东北春大豆品种与三个山东夏大豆、三个山西春大豆品种进行不完全双列杂交。三个夏大豆及三个山西春大豆品种在吉林省公主岭条件下的生育期相近。评价了这12个杂交组合的F₁、F₂及F₃代的产量及其对亲本平均值的优势。 试验结果表明,春×春与春×夏大豆杂交组合的亲本产量差异小于后代产量的差异,夏大豆组合较春大豆组合的籽粒产量及其配合力大。不同地理来源的品种配合力有更大的差异,而且这种差异给后代表现以较大的影响。不同夏大豆品种虽然也有较大的配合力差异,但这种差异对后代群体产量影响较小。 根据上述结果,以不同地理来源的品种与本地品种杂交时,首先确定具有高产后代群体的某一地理来源的材料作为方向,再从中选择最高产的品种作杂交进行选育高产品种,可能是有效的。更多还原

【Abstract】 Six plant introductions, three summer planting cultivars from province Shandong and three spring planting cultivars from province Sha-nxi were crossed with three northeast spring planting cultivars in a incomplate-diallel design. These crosses were called spring × spring or spring × summer crosses respectively. The six plant introductions were similar on growth period. Yield components of F1 and seed yield of F2 and F3 population were evaluated from 1932 to 1984.The experiment results indicated that parent mean yield difference between spring × spring crosses and summer × spring crosses were less than those between their progenies. Crosses including summer planting cultivars had higher yield level and combining ability of seed yield in F1, F2 and F3. These results showed that combining ability difference among the crosses between cultivars from different geographic area was signifac-ant and influenced largely on progeny performance. Crosses including different summer planting cultivars as parents had clear difference on combining ability, but the difference did not influence clearly on progeny performance.In soybean breeding practice, determination of geographic origination of introduced germplasm with higher yield progeny can be made, by evaluating crosses between cultivars from different geographic area. Using highest yield varieties in the introduced germplasm to make crossese would be available for development of high-yield cultivars.更多还原