| Identification of drought resistance of landrace rice mini core germplasm in Guangxi |
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| DOI：10.7606/j.issn.1000-7601.2014.02.021 |
| Key Words: Guangxi core germplasm whole growth period drought Stress identification and evaluation |
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| Abstract: |
| A total of 105 mini core collection of rice germplasm in Guangxi were indentified through treatment of whole growth period drought stress. D value was employed as the standard of evaluation, which was calculated according to panicle neck thick, effective panicles per plant, 1000-grain weight, filled grained per panicle, panicle density, seed setting rate, and grain weight per plant. The results showed that, under drought stress, grain weight per plant showed a significant positive correlation with panicle neck thick, and highly significant positive correlation with the other five morphological traits. By the evaluation of the comprehensive drought index D value, we obtained seven
local-cultivated rice varieties with high drought resistance type (6.67%). Guangxi upland rice contains high percentage of high drought resistance resources, which can be used for germplasm screening. The identified germplasm is of significance for improvement of rice drought resistance. |
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