摘要： 从83份黄淮海地区代表性大豆地方品种和育成品种(系)中按根系类型选取32份,用以研究苗期根系性状的遗传特点、与地上部性状的相关以及与逆境胁迫的关系。大豆苗期一级侧根数、主根长、根干质量、总根长和根体积等性状,在品种间、各苗龄间均存在显著遗传变异;根系性状与整株干质量呈高度相关;根干质量、根总长和根体积的相对值与耐旱平均隶属函数值,一级侧根数、主根长、总根长、根体积、根干质量的相对值与耐铝毒平均隶属函数值呈极显著相关,且根系性状的相对值在品种间存在显著变异,可用做耐逆性选择的根系指标。

关键词: 大豆, 耐逆相关根系性状, 遗传变异

Abstract: Thirty two accessions of soybean(Glycine max(L.)Merr.)selected from 83 representative entries fromHuang-huai-hai Region according to their root performance were used to study their genetic variation of root traits atseedling stage and their relationship with above-ground traits and tolerance to abiotic stresses. Dry root weight, total rootlength and root volume of accessions from Middle-Lower Chang-jiang Valleyswith later maturity developed more quicklythan those from Huang-huai-hai Valleys with earlier maturity. The correlations between these root traits and whole plantdry weight were pretty high,those between the meanmembership index of drought tolerance and the relative values of totalroot length,root volume and dry root weight per plant were all significant at 0. 01 level and so did for the correlations be-tween mean membership index of aluminum toxin tolerance and the stressed to unstressed relative valuesof number of lat-eral roots,tap root length,total root length,root volume and dry root weight. These relative root traits hadwide variation a-mong accessions and could be used for identification of drought and aluminum tolerance.

Key words: Soybean(Glycine max(L) Merr.), Root trait related to stress tolerances, Genetic variation

中图分类号: 

• S565.1