夏播大豆生育期结构和农艺性状的遗传参数研究

试验从339个大豆品种中选取生育期小于100d的103个品种进行生育期结构特性与农艺性状之间的遗传参数分析。结果表明：1）单株荚数与单株粒数、生育前期呈极显著正相关，与R1呈显著正相关；单株粒数与R7呈显著正相关；百粒重与全生育期呈极显著正相关。2）遗传力＞60%的农艺性状分别为结荚高度、株高、主茎节数、R1、百粒重、生育前期、荚长、生育后期、全生育期。3）相对遗传进度的大小依次为主茎分枝数、有效分枝始节、结荚高度、株高、单株粒数。4）遗传变异系数＞25%的为主茎分枝数、有效分枝始节、结荚高度、单株粒数、株高、单株荚数。

Studying on Genetic Parameter of the Bearing Term Structure and Agronomic Characters of the Summer Seeding Soybean

The analyses on genetic parameter between the bearing term traits and agronomic character of 103 soybean varieties whose the bearing term was less than 100 days chosen from 339 soybean varieties. The results indicated:1)The amount of legumes per plant was significant positive with the number of seeds per plant and the bearing term prophase, was striking positive with R1;it was striking positive between the number of seeds per plant and R7;it was significant positive with 100-seed weight and whole bearing term.2)The agronomic characters whose h2>60% were the height of lowest legume, the height of plant, the number of caulisnodes,R1,100-seed weight, the early stage of bearing term, the length of legume, the later stage of bearing term, whole bearing term.3)The ordinal rate of relative heredity progress were the number of caulisdivarications, the first efficient divaricating, the height of lowest legume, the height of plant, the amount of seeds per plant.4)Whose genetic variation parameter>25% were the number of caulis divaricating, the first efficient divaricating, the height of lowest legume, the number of seeds per plant, the height of plant and the number of legumes per plant.