WANG Min,YANG Wan-ming,DU Wei-jun.Root and Aboveground Characteristics at Seedling and Their Relationship with Drought Tolerance in Soybean[J].Soybean Science,2012,31(03):399-405.[doi:10.3969/j.issn.1000-9841.2012.03.013]
苗期大豆根系及地上部性状与耐旱性的关系
- Title:
- Root and Aboveground Characteristics at Seedling and Their Relationship with Drought Tolerance in Soybean
- 文章编号:
- 1000-9841（2012）03-0399-07
- Keywords:
- Soybean; Seedling; Root characteristic; Drought tolerancere
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 选用耐旱性较强的野生大豆SNWS0048和综合性状优良但不耐旱的育成品种晋大73为亲本，构建回交自交系（BIL）群体。连续2 a在人工控制环境下，检测不同水分条件下该大豆群体的苗期根系及地上部性状，采用相关及通径分析研究了大豆根系及地上部性状与耐旱性的关系，同时探讨了这些性状的遗传特性。结果表明：在干旱胁迫下株高、茎重、根长和根重均有所下降，根冠比有所升高。干旱胁迫下的耐旱系数与所有性状呈正相关，其中与主根长、根重、根冠比极显著相关，与茎重显著相关，与株高相关不显著。通径分析进一步表明正常供水条件下根干重对大豆耐旱性有重要影响，而干旱胁迫条件下根冠比对大豆耐旱性的影响较大。
- Abstract:
- A BIL population is developed from a crossing between SNWS0048,a wild soybean with strong drought tolerance and Jinda73,a drought-sensitive variety with superior agronomic traits.The phenotypic characteristics of the BIL population were examined in seedling under drought and well-watered condition as well as the controlled environments for two years,including taproot length,root weight,root shoot ratio and so on.Root and aboveground traits and their relationship with drought-tolerance were studied using correlations and path analysis,and discussed the heredity characteristic of these traits.The result showed that plant height,shoot weight,root length and root weight were decreased and root shoot ratio was increased under drought condition.The correlative analysis showed that drought tolerant coefficient had significant positive correlation with taproot length,root weight and root shoot ratio.Path analysis showed that root dry weight in the well-watered condition and root/shoot ratio under drought stress were the main factors reflecting drought-tolerance of soybean.
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备注/Memo
基金项目：国家自然科学基金项目(31171580)；山西省科技基础条件平台建设计划(20110910040103)；山西农业大学育种基金项目（2011001）；山西农业大学引进人才科研启动项目（XB2010010）。