水稻幼苗期耐寒生理特性鉴定及利用  

Identification and utilization of physiological characteristics imparting chilling-resistance in rice at seedling stage

作　　者：王威豪[1] 石瑜敏[1] 刘百龙[1] 韦善富[2] 毛昌祥[1] 

机构地区：[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,南宁530007

出　　处：《南方农业学报》2011年第3期253-256,共4页Journal of Southern Agriculture

基　　金：广西青年基金项目(桂科青0832064);广西自然科学基金项目(桂科自0991201);广西农业科学院基本科研业务专项项目[201008(基)];广西农业科学院基本科研业务专项项目[200921(基)]

摘　　要：【目的】利用水稻耐寒种质资源,培育耐寒性品种。【方法】以5份不同的水稻种质材料为供试品种,幼苗经(5±1)℃低温处理后,进行耐寒性鉴定及相关生理特性测定,筛选耐寒性品种。【结果】索稻1号和南阳占较耐寒,达1级耐寒,桂368和R96-82达2级耐寒,爱叶绿达3级耐寒;叶绿素含量、可溶性糖含量和过氧化氢酶(CAT)活性索稻1号和南阳占表现较高,丙二醛(MDA)含量则较低。【结论】索稻1号和南阳占表现出较强的耐寒性,可作为耐寒育种材料利用。【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 chlorophy ll 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.

关 键 词：水稻 幼苗期 耐寒生理 鉴定 利用 

分 类 号：S511.01[农业科学—作物学]