QTL Mapping for Controlling Days to Pollen Shed under Different Nitrogen Regimes in Maize
Nitrogen (N) deficiency affects severely many metabolic pathways and physiological progresses during maize (Zea mays L.) growing stage, and change of days to pollen shed (DPS) is one of the most serious consequences. To realize the genetic basis of DPS, a recombinant inbred line (RIL) population from the cross between Mo17 and Huangzao4 was used to identify the quantitative trait loci (QTLs) controlling DPS under two N regimes. As a result, 2 QTLs were detected, of which the QTL identified under both N regimes was quite near to the marker Nc134, with 0 centiMorgan (cM) of mapping distance between them, it could account for 15.36% and 10.39% of phenotypic variance under high and low N regimes respectively, and could make maize flower with ahead of time about 1 d duo to its additive effect. The other QTL, identified only under low N regime, was close to marker Bnlg1129 with 8.6 cM of maping distance between them, could explain 12.39% of phenotypic variance and increase DPS for 0.8 d owing to its additive effect. These results are beneficial for understanding the genetic basis of DPS in maize.
Xiaohong Liu Yongsi Zhang Zuping Zheng Zhong Li Chuan He Daihui Liu Guoqing Zhang Yangchun Luo Zhenbo Tan
College of Life Sciences China West Normal University Nanchong City, P.R.China Nanchong Agricultural Research Institute Nanchong City, P.R.China Beijing IPE Biotechnology Co., Ltd Beijing City, P.R.China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）