30份普通菜豆苗期抗旱性鉴定及抗旱指标的确定.docVIP

30份普通菜豆苗期抗旱性鉴定及抗旱指标的确定 曾 辉，， (1南阳师范学院，河南 南阳 473061 摘要：以 30份普通菜豆为试验材料，采用PEG6000溶液模拟干旱胁迫处理种子地下鲜重地上鲜重全株鲜重电导率Fv/Fm的关联度均大于0.8，与综合抗旱指数的关系较为紧密F1863、F2973、F3992和F3057抗旱性较强的普通菜豆地Evaluation of Drought Tolerance of 30 Common Bean in Seedling Stage and Screening of Drought-tolerance Assessment Index ZENG Hui1, CAO Yuan-nan1, WANG Shu-min2, WANG Lan-fen2, DONG Hai-hong1, CHEN Ji-bao1 (1Nanyang Normal University, Nanyang Henan 473061; 2Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081) Abstract：30 accessions of common bean were employed for evaluation of drought tolerance in seedling stage. Drought stress treatments for common bean seed germination modulated using PEG6000 solution and for common bean seedlings used the method of withholding water content of soil. Eleven traits were evaluated for assessment of drought resistance, including seed germination rate, relative shoot fresh weight, relative root fresh weigh, relative water content, relative electrical conductivity and three chlorophyll fluorescence parameters. Comprehensive assessment of drought tolerance based on membership function and grey-relation analysis indicate that the materials have different responses to drought stress, accessions of F1863、F2973、F3992 and F3057 showed the strongest drought tolerance among all tested materials. Relative seed germination rate, relative shoot fresh weight, relative root fresh weigh, relative plant fresh weight, relative electrical conductivity and chlorophyll fluorescence parameters Fv/Fm has closely association with comprehensive drought tolerance indices, and the association degree are more than 0.8, thus could be used as comprehensive index for identification of drought resistance at the seedling stage． Key words：common bean, drought stress, seedling stage, grey-relation analysis, membership function 普通菜豆(Phaseolus vulgaris L.)，又名为四季豆、芸豆等，属于豆科(Leguminosae)蝶形花亚科菜豆属，是世界上主要的食用豆类之一干旱是影响普通菜豆生产的重要因素Terán等[4]从国际热带农业研究中心（CIAT）保存的普通菜豆种质资源中筛选到 5 份抗