论文部分内容阅读
从辽宁省主要推广品种中选出20份优异种质资源,依据株高、叶面积指数、茎、叶生物量为指标,采用平均隶属函数值方法鉴定了大豆苗期耐旱性。结果从供试材料中共筛选出大豆生长前期较强耐旱型(2级)品种2个,干旱较敏感型(4级)品种3个,中间型(3级)品种15个。大豆的平均耐旱隶属函数值与干旱胁迫下的相对根表面积、相对根生物量分别呈显著、极显著正相关。大豆的耐旱平均隶属函数值与根性状比未达显著相关程度。胁迫条件下大豆的根直径与根表面积、根体积,根表面积与根体积呈显著正相关,非胁迫条件下大豆的根直径与根体积、根生物量,根体积与根表面积、根生物量呈显著正相关。干旱胁迫及非胁迫条件下大豆的茎、叶生物量均呈显著正相关。
Twenty excellent germplasm resources were selected from the main popularized varieties in Liaoning Province. Based on the plant height, leaf area index, stem and leaf biomass, the average membership function was used to identify the drought tolerance of soybean at seedling stage. Results A total of 2 drought tolerant (2) cultivars, 3 drought sensitive (4) cultivars and 15 intermediate (3) cultivars were selected from the tested materials. The average drought tolerance membership value of soybean was significantly and positively correlated with relative root surface area and relative root biomass under drought stress. The average drought resistance of soybean was lower than that of root traits. The root diameter, root surface area, root volume, root surface area and root volume of soybean under stress were positively correlated. Under non-stress conditions, the root diameter and root volume, root biomass, root volume and root surface area, Significantly positive correlation. Under drought stress and non-stress conditions, the stem and leaf biomass of soybean had a significant positive correlation.