首页|期刊导航|中国农业科学（英文版）|Unconditional and Conditional QTL Mapping for Tiller Numbers at Various Stages with Single Segment Substitution Lines in Rice (Oryza sativa L.)
中国农业科学（英文版）2008，Vol.7Issue(3)：257-265,9.
Unconditional and Conditional QTL Mapping for Tiller Numbers at Various Stages with Single Segment Substitution Lines in Rice (Oryza sativa L.)
Unconditional and Conditional QTL Mapping for Tiller Numbers at Various Stages with Single Segment Substitution Lines in Rice (Oryza sativa L.)
摘要
Abstract
Tiller is one of the most important agronomic traits which influences quantity and quality of effective panicles and finally influences yield in rice.It is important to understand "static" and "dynamic" information of the QTLs for tillers in rice.This work was the first time to simultaneously map unconditional and conditional QTLs for tiller numbers at various stages by using single segment substitution lines in rice.Fourteen QTLs for tiller number,distributing on the corresponding substitution segments of chromosomes 1,2,3,4,6,7 and 8 were detected.Both the number and the effect of the QTLs for tiller number were various at different stages,from 6 to 9 in the number and from 1.49 to 3.49 in the effect,respectively. Tiller number QTLs expressed in a time order,mainly detected at three stages of 0-7d,14-21d and 35-42d after transplanting with 6 positive,9 random and 6 negative expressing QTLs,respectively.Each of the QTLs expressed one time at least during the whole duration of rice.The tiller number at a specific stage was determined by sum of QTL effects estimated by the unconditional method,while the increasing or decreasing number in a given time interval was controlled by the total of QTL effects estimated by the conditional method.These results demonstrated that it is highly effective and accurate for mapping of the QTLs by using single segment substitution lines and the conditional analysis methodology.关键词
single segment substitution line,unconditional QTL mapping,conditional QTL mapping,tiller number,riceKey words
single segment substitution line,unconditional QTL mapping,conditional QTL mapping,tiller number,rice分类
农业科学引用本文复制引用
ZHAO Fang-ming,LIU Gui-fu,ZHU Hai-tao,DING Xiao-hua,ZENG Rui-zhen,ZHANG Ze-min,LI Wen-tao,ZHANG Gui-quan..Unconditional and Conditional QTL Mapping for Tiller Numbers at Various Stages with Single Segment Substitution Lines in Rice (Oryza sativa L.)[J].中国农业科学（英文版）,2008,7(3):257-265,9.基金项目
This work was supported by the grants from the National .Basic Research Program of China (2006CB101700)and the National Natural Science Foundation of China (30330370). （2006CB101700）
