摘要
在玉米M(o17/黄早四R)IL群体中,应用SSR分子标记连锁图谱,运用WinQTLcartographerv2.0对两种供氮水平下的穗长性状进行QTL定位分析。结果表明,在高氮水平下检测到1个控制穗长的QTL,位于第1染色体上;在低氮水平下检测到4个穗长QTLs,第1和第5染色体上各2个,说明穗长QTLs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个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可能与玉米对低氮胁迫耐性有一定的关联。
With windows QTL cartographer v2.0, Quantitative trait loci for maize ear length under two nitrogen levels were mapped on to the SSR molecular marker linkage map by using maize RIL population derived from a＇cross between Mo17 and huangzaosi. One QTL for ear length on chromosome 1 were detected at high N level, four QTLs for ear length, two on chromosome 1 and the others on chromosome 5 were identified at low N level. The interaction between N levels and QTLs for maize ear length was therefore suggested. Based on this interaction and different re- spose 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 maize to tolerate low N stress.
出处
《玉米科学》
CAS
CSCD
北大核心
2005年第4期102-104,108,共4页
Journal of Maize Sciences
关键词
玉米
穗长
QTL分析
供氮水平
Maize
Ear length
Detecting QTL analysis
Nitrogen level
