| Drought resistance evaluation of DH lines from interspecific hybrid of B. napus and B. juncea in flowering stage |
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| DOI：10.7606/j.issn.1000-7601.2017.02.14 |
| Key Words: interspecific hybrid of B.napus and B.juncea doubled haploid lines drought stress drought resistance index correlation coefficient |
| Author Name | Affiliation | | YUAN Xiao-yan | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China | | TIE Chao-liang | Xundian Agricultural Technology Extension Station ,Xundian, Yunnan 655200, China | | FU Ming-lian | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China | | LI Gen-ze | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China | | ZI De-hua | Linxiang Agricultural Technology Extension Station, Linxiang, Yunnan 677099, China | | ZHANG Yun-yun | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China | | WANG Jing-qiao | Industrial Crop Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan 650205, China |
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| Abstract: |
| In this study, 22 doubled haploid (DH) lines from interspecific hybrid of B.napus and B.juncea were planted under both conditions of drought stress and normal irrigation at flowering stage in 2013 and 2015, during which the rainfall was 5.7 mm and 6.7 mm. The yield and yield-related agronomic traits were observed, and the drought-resistance of different lines was evaluated by adopting drought resistance index method, gray relevancy method and cluster analysis. The results showed that the drought resistance of most interspecific hybrids was stronger than that of conventional B. napus cultivars, and 7 strong drought-resistant materials were screened. No matter the direct evaluation method or the comprehensive method of correlation coefficient was adopted, the classification consistent rate of drought-resistance level was about 42.55% under two different conditions of drought stress. The drought resistance of same materials was inconsistent under different conditions of drought stress. Therefore, it is more reliable to evaluate the drought resistance of crops with comprehensive evaluation method under various extents of drought stress. |
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