Identification of the quantitative trait loci for grain rate in maize

Liu, Xiaohong and He, Sulan and Zheng, Zuping and Tan, Zhenbo and Liu, Daihui (2010) Identification of the quantitative trait loci for grain rate in maize. African Journal of Biotechnology , 9 (47). pp. 8007-8012.

[img] PDF


Grain rate (GR) is a very important trait in maize (Zea mays L.) breeding program related to yield. To realize its genetic basis, a recombinant inbred line (RIL) population and different nitrogen (N) regimes were used to map the quantitative trait loci (QTLs) for GR in maize. As a result, two QTLs were identified under high N regime and could explain a total of 14.84% of phenotypic variance. Due to additive effect, the QTL on chromosome 6 could decrease 0.029 of GR, while the QTL on chromosome 9 could increase 0.0203 of GR. Under low N regime, one QTL was mapped on chromosome 6 and could account for 9.52% of phenotypic variance, and owning to additive effect, the QTL could make GR decrease by 0.0234. The result in comparison with previous studies showed that the three QTLs in this present study were new quantitative loci associated with GR in maize. These results were beneficial for understanding the genetic basis of GR in maize.

Item Type: Article
Author Affiliation: College of Life Sciences, China West Normal University, Nanchong City 637009, People’s Republic of China; Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), People’s Republic of China
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Biotechnology
Divisions: Maize
Depositing User: Mr T L Gautham
Date Deposited: 29 Nov 2010 22:42
Last Modified: 29 Dec 2010 20:09
Official URL:

Actions (login required)

View Item View Item