摘要
本试验以22份不同基因型大豆品种（品系）为研究材料,使用快速简便的高渗溶剂聚乙二醇（PEG6000）进行室内模拟干旱胁迫试验,探讨干旱胁迫对不同大豆品种（品系）萌发性状的影响,并采用隶属函数值法对不同品种进行抗旱适应性评价。结果表明干旱胁迫条件下不同生态型大豆品种的吸水率、相对发芽率、相对发芽势、根长指数均比清水对照低。品种间萌发性状存在差异,其中变异系数最大的为相对发芽率,为73%,变异幅度为4.25%-44.56%,变异系数最小的为12h吸水率,为11%,变异幅度为28.54%-48.75%,12h吸水率、相对发芽势、相对发芽率、根长指数与萌发抗旱系数呈极显著正相关,可作为大豆芽期抗旱性鉴定的重要指标。初步鉴选出4个强抗型大豆品种,分别为：晋大74、晋大70、晋大83和晋大73,鉴选出3份敏感型品种,分别为晋大75、黑珍珠、扁茎豆,其他15份品种为中抗型品种。研究结果可为大豆萌发期抗旱性评价提供理论参考。
22 soybean cultivars from different eco-types were collected as test materials, and through indoor simulating drought stress with polyethylene glycol（PEG6000） to study the effect of drought on germinal traits of different soybean cuhivars （strains） , and evaluate the drought-resistant adaptability of different cultivars by subordinate function. Results showed that under water stress, water absorption rate, relative germination rate, relative germination potential and root length index of different eco-types were lower than those of pure water. There was difference between germinal traits of cuhivars; the variation coefficient of relative germination rate was the highest one （73%）, the variation range was 4. 25% -44.56%. The variation coefficient of 12h water absorption rate was the lowest one （11%） , the variation range was 28.54% -48.75%. 12h water absorption rate, relative germination potential, relative germination rate, root length index, were significantly positively correlated with germinal drought-resistant index, which could be the important indexes for evaluation of drought resistance of soybeans in seedling stage. 4 cultivars with strong drought resistance were initiatively selected, they were‘ Jinda74 ＇ ,‘ Jinda70 ＇ , ‘ Jinda80 ＇ , and ‘ Jinda73 ＇ 3 sensitive cultivars were selected, they were ‘Jinda75＇ , ‘Black Pearl＇ and Bianjing： Other 15 varieties （lines） were cultivars with medium drought resistance. The results can provide evaluation of drought resistance of soybeans in germination stage with theoretical reference.
出处
《核农学报》
CAS
CSCD
北大核心
2014年第6期1133-1141,共9页
Journal of Nuclear Agricultural Sciences
基金
黑龙江省自然科学基金重点项目(ZD2010003)
国家自然科学基金项目(31371651)
中国科学院大豆分子设计育种重点实验开放基金
关键词
室内模拟
大豆
萌发性状
抗旱评价
Laboratory simulation
Soybean
Germination traits
Drought-resistant evaluation
