QTL mapping for ear length and ear diameter under different nitrogen regimes in maize

Zhang, Hongmei and Zheng, Zuping and Liu, Xiaohong and Li, Zhong and He, Chuan and Liu, Daihui and Luo, Yangchun and Zhang, Guoqin and Tan, Zhenbo and Li, Runzhi (2010) QTL mapping for ear length and ear diameter under different nitrogen regimes in maize. African Journal of Agricultural Research , 5 (8). pp. 626-630.

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Abstract

Ear 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 maize.

Item Type: Article
Author Affiliation: Shanxi Agricultural University, Taigu, 030800, P. R. China.
Subjects: Crop Improvement > Genetics
Divisions: Maize
Depositing User: Mr T L Gautham
Date Deposited: 09 Nov 2010 14:35
Last Modified: 29 Dec 2010 20:44
Official URL: http://www.academicjournals.org/ajar/PDF/pdf%20201...
URI: http://eprints.icrisat.ac.in/id/eprint/504

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