Mapping QTL for Grain Yield under Moisture Stress Environments in Rice (Oryza sativa L.)

  • Supriyo CHAKRABORTY North Carolina State University, Bioinformatics Research Centre, 1 Lampe Drive, Raleigh, NC 27695 (US)
  • Sheng-Chu WANG North Carolina State University, Bioinformatics Research Centre, 1 Lampe Drive, Raleigh, NC 27695
  • Zhao-Bang ZENG North Carolina State University, Bioinformatics Research Centre, 1 Lampe Drive, Raleigh, NC 27695

Abstract

Polygenes (QTLs) for grain yield were mapped on rice chromosomes under two moisture stress environments by multiple interval mapping (MIM) method in a double haploid (DH) population derived from a cross between a deep-rooted japonica and a shallow-rooted indica genotype. In environment 1 (E1), the MIM detected a total of six QTLs for grain yield on chromosomes-two QTLs on chromosome 1 and four QTLs on chromosome 5 along with one additive x additive epistasis. But in environment 2 (E2), the MIM detected five QTLs for grain yield on two chromosomes-three QTLs on chromosome 1 and two QTLs on chromosome 7. One common QTL on chromosome 1 flanked by the markers RG109-ME1014 was detected in both the environments, although the other detected QTLs differed between environments. The magnitude of QTL effect, percent genetic variance and percent phenotypic variance explained by each QTL was also estimated in both environments. The common QTL explained about 26.05 and 13.93% of genetic variance in E1 and E2, respectively. Estimated broad sense heritability for grain yield was 48.01 in E1 and 25.27% in E2.

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Author Biography

Supriyo CHAKRABORTY, North Carolina State University, Bioinformatics Research Centre, 1 Lampe Drive, Raleigh, NC 27695
Bioinformatics Research Centre Visiting Research Scholar
Published
2011-11-17
How to Cite
CHAKRABORTY, S., WANG, S.-C., & ZENG, Z.-B. (2011). Mapping QTL for Grain Yield under Moisture Stress Environments in Rice (Oryza sativa L.). Notulae Scientia Biologicae, 3(4), 129-133. https://doi.org/10.15835/nsb346344
Section
Research articles
CITATION
DOI: 10.15835/nsb346344