玉米穗部性状的QTL分析

QTL Analysis for Ear Traits in Maize Using Molecular Markers

利用来自于农大108的一套重组近交系,通过1年3个试点的田间试验,借助分子标记遗传连锁图谱,对5个玉米穗部性状进行了遗传分析.结果表明,穗长与穗粒重均表现出极显著的正相关,同时穗行数和行粒数与穗粒重也表现显著的正相关关系.通过QTL分析,在3个试点中共定位了38个有关玉米穗部性状的QTL,其中控制穗长的QTL 8个,控制行粒数的QTL 7个,穗行数的QTL 9个,百粒重的QTL 4个,穗粒重的QTL 10个.但多数QTL只在1个环境中检测到.

A set of recombinant inbred line （RIL） populations derived form an elite hybrid, Nongda 108, were used to analyze the genetic bases of ear related traits in maize, which were evaluated in the field at three locations, and a genetic linkage map was constructed using molecular markers. The results indicated that ear length has significant postive correlation with kernels weight per ear, so as the kernel per row and row number with kernel weight per row. A total of 38 QTL were detected for 5 measured traits, including 8 QTL for ear length, 7 QTL for kernel per row, 9 QTL for row number, 4 QTL for 100-kernel weight, and 10 QTL for kernel weight per row. Out of the QTL, many QTL were detected only at one location.