摘要
1987和1989年进行了盆栽试验,观察和测定了野生大豆根系的一些特征。结果表明,野生大豆根系的干重、形态特征、根系活力及结瘤固氮活性等均存在明显的基因型间差异;野生大豆茎/根比率随着生育进程不断增长;野生大豆材料根瘤发生及固氮动态有多种模式,其侧根在结瘤固氮方面占有明显的优势;其根系干重、根瘤个数、根瘤鲜重及根瘤固氮活性与茎叶干重及叶片含氮量呈正相关。野生大豆在结荚鼓粒后期根系干重增长率明显高于栽培豆,在选配大豆杂交亲本时,利用这种特性可望选育出后期根系发达、不早衰、籽粒饱满的大豆新品种。
The pot experiments were conducted for two years to determine some characters of root system of wild soybean (Glgcine Soja). The results showed that there were significant differences among the genotypes of wild soybean in dry weight, morphological characters, growth vigor, formation and N-fixing activity of root nodules. The shoot/root ratio for wild soybean was increased during the growing period. The increment of root dry weight of wild soybean was much higher than that of cultivated soybean during the pod-bearing stage. The intensity of biological oxidation of a-naphthylamine in root system, the nodule number and N-fixing activity of wild soybean was higher than that of cultivated one during seedling stage. The taproot of wild soybean played an important role on nitrogen fixation during the seedling stage, but the lateral roots gave more nodules and higher N-fixing activity after stem-branching stage. The dry weight of top part and N content in leaves of wild soybean increased with the increases of root dry weight, number and fresh weight of nodules, and N-fixing activity. Abundant resources of wild soybean with high N-fixing activity and growth vigor of root system could be selected as the parent materials for soybean breeding.
出处
《福建农业学报》
CAS
1992年第2期53-59,共7页
Fujian Journal of Agricultural Sciences
关键词
野生大豆
根系干重
根系活力
固氮活性
相关性
Wild soybean
Root dry weight
Growth vigor of root system
N-fixing activity
Relationship
