栽培稻旱胁迫叶片相关性状的遗传解析(英文)  

Genetic Dissection for Leaf Correlative Traits of Rice (Oryza sativa L.) Under Drought Stress

作　　者：郭龙彪[1] 钱前[1] 曾大力[1] 董国军[1] 滕胜[1] 朱立煌[2] 

机构地区：[1]中国水稻研究所国家水稻生物学重点实验室 [2]中国科学院遗传与发育生物学研究所,北京100101

出　　处：《Acta Genetica Sinica》2004年第3期275-280,共6页

基　　金：国家自然科学基金(编号 :30 2 70 80 8);浙江省自然科学基金(编号:30 2 376)资助项目~~

摘　　要：利用籼稻窄叶青 8号 (ZYQ8)和粳稻京系 17(JX17)衍生的加倍单倍体 (DH)群体 12 7个株系 ,2 0 0 2年在杭州采用田间断水法栽培 ,在水分胁迫下 ,对叶片的卷叶、相对含水量和电导率 3个性状进行了评价和QTL分析。结果表明 ,3个性状在DH群体中均存在双向超亲分离 ,接近正态分布 ,受数量性状基因的控制 ;检测到影响这些性状的6个QTL ,其中卷叶 3个 (qLR 1,qLR 5和qLR 11)、相对含水量 2个 (qRWC 1和qRWC 6)和电导率 1个 (qREC 6)。旱胁迫时 ,目测卷叶方便易行 ,适于对大批品种或资源筛选 。Water is becoming a restricted factor of agricultural development owing to the global shortage of water resources.Screening and improving drought tolerant rice cultivars would be helpful for increasing and stabilizing yield,economizing water and reducing environmental pollution.In this study,127 rice lines of DH population derived from an indica variety Zhaiyeqing 8 (ZYQ8) and a japonica variety Jingxi 17 (JX17) were used to locate QTLs for leaf rolling,relative water content and rate of electric conductivity under drought stress.The results showed that significant differences between the parents were detected for all measured traits.The tremendous transgressive segregations for these traits were observed in the population.The frequency of all traits in the population was approximately normally distributed with slight skew.A total of six QTLs for the three traits were detected with molecular linkage map of 234 markers,including three QTLs (qLR-1,qLR-5 and qLR-11) for leaf rolling,two QTLs (qRWC-1 and qRWC-6) for relative water content and one QTL (qREC-6) for rate of electric conductivity.Visual measurement for leaf rolling can be used to screen a large number of rice germplasm resources or varieties,which is of importance to screening and utilization of drought tolerant rice varieties.

关 键 词：栽培稻 旱胁迫 加倍单倍体(DH)群体 叶片相关性状 数量性状基因(QTL) 

分 类 号：S511[农业科学—作物学]