QTL mapping for ear
length and ear diameter under different nitrogen regimes in
Hongmei Zhang1,4*, Zuping Zheng2,
Xiaohong Liu3, Zhong Li2, Chuan He2,
Daihui Liu2, Yangchun Luo2, Guoqin
Zhang2, Zhenbo Tan3 and Runzhi Li1
Agricultural University, Taigu 030800, P. R. China.
Institute of Agricultural Sciences, Nanchong 637000, P. R.
of Life Sciences, China West Normal University, Nanchong
637009, P. R. China.
4Maize Research Institute, Shanxi Academy of Agricultural Sciences,
Xinzhou 034000, P. R. China.
email@example.com. Tel: + 86-03503880229.
15 February, 2010
length (EL) and ear diameter (ED) are two of the most
important traits in maize (Zea mays L.), related to
yield and plant morphology. In this study, an F9
recombinant inbred line (RIL) population was used to
identify the quantitative trait loci (QTLs) controlling EL
and ED under two nitrogen (N) regimes. As a result, 3 QTLs
were detected under N rich environment, 1 for EL on
chromosome 1 and 2 for ED on chromosome 9. Under N stress
environment, 4 QTLs were identified, 1 for EL on chromosome
1 and 3 for ED on chromosome 4 and 9. The phenotypic
variances explained by these QTLs ranged from 5.68% to
9.86%, their additive effects were from -0.74 to 0.16. These
results were beneficial for realizing the genetic basis of
EL and ED and carrying out marker-assisted selection in
mays L.), ear length, ear diameter, quantitative trait
locus, recombinant inbred line, nitrogen.