两种供氮水平下水稻穗长QTLs的检测  

Detecting QTLs for Rice Panicle Length under Two Nitrogen Levels

作　　者：方萍[1] 季天委[1] 陶勤南[1] 吴平[2] 

机构地区：[1]浙江大学环境与资源学院,浙江杭州310029 [2]浙江大学生命科学学院,浙江杭州310029

出　　处：《中国水稻科学》2002年第2期176-178,共3页Chinese Journal of Rice Science

基　　金：浙江省自然科学基金资助项目 (3 962 91)

摘　　要：在水稻 (IR6 4× Azucena) DH群体中应用分子标记连锁图 ,对不同供氮水平下的穗长性状进行 QTL区间作图分析。在高氮水平下检测到控制穗长的 QTL s 2个 ,分别位于第 1和第 4染色体上 ;在低氮水平下检测到 5个穗长 QTL s,其中 3个分别位于第 1、4和 6染色体上 ,2个位于第 3染色体的不同部位 ,说明穗长 QTL与供氮水平之间可能存在交互效应。基于这种互作效应及研究中观察到的两供试亲本对低氮胁迫的耐性差异 ,推测仅在低氮水平下检测到的穗长 QTLs可能跟水稻对低氮胁迫耐性有一定的关联。Quantitative trait loci (QTLs) for rice panicle length under two nitrogen levels were mapped on to the molecular marker linkage map by using a rice doubled haploid population derived from a cross between IR64 and Azucena. Two QTLs for panicle length, one on chromosome 1 and the other on chromosome 4 were detected at high N level, while five QTLs for panicle length were identified at low N level. The interaction between N levels and QTL for rice panicle length was therefore suggested. Based on this interaction and different response to low N stress between two parents, it was supposed that some QTLs only detected at low N level might be related with the ability of rice to tolerate low N stress.

关 键 词：供氮水平 水稻 穗长 分子标记 数量性状位点 氮肥 氮胁迫 

分 类 号：S511[农业科学—作物学]