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水稻幼苗期耐寒生理特性鉴定及利用
作者: 王威豪1  石瑜敏1  刘百龙1  韦善富2  毛昌祥1  
单位: (1 广西农业科学院水稻研究所/广西水稻遗传改良重点实验室  南宁 530007;2 广西农业科学院植物保护研究所  
关键词: 水稻  幼苗期  耐寒生理  鉴定  利用  
分类号:S511.01
出版年,卷(期):页码:2011 ,42 ( 3 ): 页码:253-256
摘要:

【Objective】The present study was conducted to evaluate the rice germplasm resources in order to identify physiological characteristics imparting chilling resistance at seedling stage. 【Method】Five rice varieties have been treated with low temperature (5±1)℃ and evaluated on the basis of MDA (Malondealdehyde), soluble sugars, chlorophyll content and the activity of catalase enzyme. 【Result】The rice variety Suodao 1 and Nanyangzhan showed maximum survival percentage compared to other varieties followed by the variety Gui 368 and R96-82. Variety Aiyelü was found least tolerant to chilling stress. The varieties Suodao 1 and Nanyangzhan were found superior to other rice varieties in having higher chlorophyll content, soluble sugar content and the activity of catalase enzyme, and lesser MDA content. 【Conclusion】The results clearly indicated that varieties Suodao 1 and Nanyangzhan were resistant to chilling stress and may be utilized in breeding programs developed to make cold tolerant varieties.

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