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黄河三角洲野大豆(Glycine soja Sieb. et Zucc.)盐渍群体的耐盐性高于附近的正常群体。群体内个体间耐盐能力差别很大。盐渍群体有比最耐盐的栽培大豆(G.max (L.)Merr.)品种耐盐能力高得多的个体,也有对盐相当敏感的植株。同工酶分析表明群体内高水半多态性,但酶谱与抗性没有相关性。盐渍与正常群体间的遗传一致性高达0.96。用改良的随机扩增多态DNA(RAPD)方法,10个引物扩增得出群体内多态位点百分数为68/188=0.36。看来,绝大多数位点与耐盐能力无关。上述资料说明,盐渍条件下野大豆自然群体的高度遗传多样性和发育变通性,可能足对盐胁迫强度随时随地变化的环境的适应。
The salt tolerance of Saline Soja Sieb. Et Zucc. Was higher than that of the normal population nearby. Salt tolerance varies greatly among individuals in the group. Salinized populations have individuals with significantly higher salt tolerance than the most salt-tolerant cultivated soybean (G. max (L.) Merr.) Plants that are also quite salt sensitive. Isoenzyme analysis showed high water polymorphism within the population, but the zymogram was not associated with resistance. The genetic identity between salted and normal populations is as high as 0.96. Amplified by random amplified polymorphic DNA (RAPD) method, 10 primers amplified the percentage of polymorphic loci in the population was 68/188 = 0.36. It seems that the vast majority of sites have nothing to do with salt tolerance. The above data indicate that the high genetic diversity and developmental adaptability of natural populations of wild soybean under salinity conditions may be sufficient to adapt to the changing environment of salt stress at any time and place.