期刊
PLANT PRODUCTION SCIENCE
卷 20, 期 3, 页码 323-335出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/1343943X.2017.1334511
关键词
Soybean; core collection; hypoxia tolerance; waterlogging tolerance; root morphology
类别
资金
- Japan Society for the Promotion of Science [15K14640]
- Ministry of Agriculture, Forestry and Fisheries of Japan [Genomics-based Technology for Agricultural Improvement] [SFC-1005]
- Grants-in-Aid for Scientific Research [15K14640] Funding Source: KAKEN
Soybean is often damaged by hypoxia caused by waterlogging at the seedling stage. Hypoxia severely inhibits root development and retards plant growth. We aimed to clarify phenotypic variation in root development under hypoxia condition at the seedling stage using diverse soybean accessions. Root development in 162 accessions was evaluated in hydroponic culture. Substantial changes under hypoxia were investigated by means of WinRHIZO analysis before and after the treatment. We found significant phenotypic variation in hypoxia tolerance in root among the 162 accessions. A principal components analysis indicated an association between hypoxia tolerance and the country of origin. We found three new accessions which have a high ability to develop roots under hypoxia (Kokubu 7, Maetsue zairai 90B, and Yahagi). Root development in selected accessions was also evaluated in soil culture. Root development levels in hydroponic and soil culture were significantly correlated. These results will provide important information on waterlogging damage in regions where waterlogging occurs. The three accessions with hypoxia-tolerant roots might be useful for genetic improvement of waterlogging tolerance of modern soybean varieties.
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