三种不同类型大豆及其杂种后代主要农艺性状的配合力分析

利用具有明显差异的3种不同进化类型的大豆，采用双列杂交方式配制类型内及类型间共15个杂交组合。结果表明，不同类型大豆主要农艺性状的一般配合力明显不同。秣食豆在株高、节间长、分枝数、单株荚数和单株粒数等性状上具有增效作用；在粒茎比和收获指数等性状上具有减效作用。亚有限类型大豆则有降低株高和节间长度，提高

The Combining Ability Analysis in Main Agronomic Characters for Three Different Types of Soybean and Their Generation

15 crosses were made among and within three obviously different types of soybeans by diallel crosses. The combining abilities for different types of soybean and their progenies were studied. The results suggested that different types of soybean had significantly different general combining abilities on the main agronomic characters. Semicuhivated soybean parents had promoting effect on plant height, length of inter-nodes, number of branches, number of pods per plant, seeds number per plant and had reducing effect on the seed-stem ratio and harvest index. Semidetermi-nate soybean had reducing effect on plant height, length of inter-nodes, and promoting effect on seed-stem ratio.It was observed that different types of crosses had significantly different breeding value and total combining abilities on the morphological characters. As the two parents of a cross evolving from semicuhivated to cultivated type, the mean value,breeding value, and total combining abilities of seed-stem ratio, harvest index and other characters of the progenies denoted increasing tendency simutaneously, but those of plant height, number of branches, length of inter-nodes and other characters had decreasing tendency. Different types of crosses had significantly different mean value, special combining abilities and total combining abilities on the yield characters.