Tong Han-Hua, Mei Han-Wei, Yu Xin-Qiao, Xu Xiao-Yan, Li Ming-Shou, Zhang Shan-Qing, Luo Li-Jun
Shanghai Agrobiological Gene Center, China.
Yi Chuan Xue Bao. 2006 May;33(5):458-67. doi: 10.1016/S0379-4172(06)60073-5.
QTL underlying related traits at the late developmental stage under two different nitrogen levels were investigated in rice using a population of chromosome segment substitution lines (CSSL) derived from a cross between Teqing and Lemont. A total of 31 QTLs referring 5 traits, that is, plant height (PH), panicle number per plant (PN), chlorophyll content (CC), shoot dry weight (SDW) and grain yield per plant (YD), were detected. Under normal N level, 3 QTLs were detected for each trait, while under low N level, 5, 4, 5 and 2 QTLs were detected for PH, PN, CC and SDW respectively. Most of the QTLs were located on chromosome 2, 3, 7, 11 and 12. QTLs controlling different traits or the same trait under different N levels were mapped on the same or adjacent intervals, forming several clusters in rice chromosomes. More than two traits were controlled by QTLs on one of four intervals (RM30-RM439, RM18-RM478, RM309-RM270, and RM235-RM17), suggesting that there were some pleiotropic effects. It was supposed that some QTLs only detected at low N level might be associated with the ability to tolerate the low N stress in rice.
利用特青和莱蒙特杂交衍生的染色体片段代换系群体，研究了水稻在两种不同氮水平下发育后期相关性状的QTL。共检测到31个QTL，涉及5个性状，即株高（PH）、单株穗数（PN）、叶绿素含量（CC）、地上部干重（SDW）和单株籽粒产量（YD）。在正常氮水平下，每个性状检测到3个QTL，而在低氮水平下，PH、PN、CC和SDW分别检测到5个、4个、5个和2个QTL。大多数QTL位于第2、3、7、11和12号染色体上。控制不同性状或同一性状在不同氮水平下的QTL定位在相同或相邻区间，在水稻染色体上形成几个簇。在四个区间（RM30-RM439、RM18-RM478、RM309-RM270和RM235-RM17）之一上，有超过两个性状受QTL控制，表明存在一些多效性效应。推测一些仅在低氮水平下检测到的QTL可能与水稻耐低氮胁迫的能力有关。
