【摘要】 从301份大豆品种中按根系类型选取黄淮海和长江中下游地区代表性材料59份,在苗期干旱胁迫和非胁迫条件下对地上部和地下部性状进行2年重复鉴定,发现材料间性状隶属函数值具有丰富遗传变异,以株高、叶龄、根干重和茎叶干重隶属函数的算术平均数为抗旱综合指标,从中筛选出汉中八月黄、晋豆14、科丰1号、圆黑豆等强耐旱型(1级)材料和临河大粉青、宁海晚黄豆等干旱敏感型(5级)材料。比根干重、比总根长、比根体积与耐旱隶属函数平均值均呈极显著正相关,可作为耐旱性的根系性状指标。更多还原

【Abstract】 Fifty nine accessions of soybean [Glycine max (L.) Merr.] of 301 ones from Huanghuai-hai and Middle-lower Changjiang Valleys were tested at seedling stage in two years for their drought tolerance by using the mean membership index value averaged over those of plant height, leaf number, root dry weight, stem and leaf dry weight.4 tolerant accessions (Rank 1) and 2 sensitive ones (Rank 5) were identified. There existed very significant correlations between drought tolerance and relative values of root dry weight, total root length, and root volume (per plant dry weight basis), respectively, which could be used as root indicators of drought tolerance.更多还原