J Integr Plant Biol. ›› 2010, Vol. 52 ›› Issue (6): 578-584.DOI: 10.1111/j.1744-7909.2010.00955.x

Special Issue: Rice Genomics and Agriculture

• Molecular Physiology • Previous Articles     Next Articles

Quantitative Trait Loci Mapping for Leaf Length and Leaf Width in Rice cv. IR64 Derived Lines

Muhammad Farooq1,2*, Analiza G. Tagle1, Rizza E. Santos1, Leodegario A. Ebron1, Daisuke Fujita1 and Nobuya Kobayashi1   

  1. 1International Rice Research Institute (IRRI), DAPO Box. 7777, Metro Manila, Philippines
    2Department of Agronomy, University of Agriculture, Faisalabad-38040, Pakistan
  • Received:2009-11-22 Accepted:2010-03-20 Published:2010-05-21
  • About author:*Author for correspondence
    Tel: +92 41 920 1098; Fax: +92 41 920 0605; E-mail: farooqcp@gmail.com


The present study was conducted to identify quantitative trait loci (QTLs) for leaf size traits in IR64 introgression lines (INLs). For this purpose, selected F2 populations derived from crosses between recurrent parent IR64 and its derived INLs, unique for leaf length and leaf width, were used to confirm QTLs. A total of eight QTLs, mapped on three chromosomes, were identified for the four leaf size traits in six F2 populations. A QTL for leaf length, qLLnpt-1, in HKL69 was identified around simple sequence repeat (SSR) marker RM3709 on chromosome 1. Two QTLs for flag leaf length, qFLLnpt-2 and qFLLnpt-4, in HFG39 were indentified on chromosomes 2 and 4, respectively. For flag leaf width, a QTL, qFLWnpt-4, in HFG39 was identified around RM17483 on chromosome 4. While another QTL for flag leaf width, qFLWnpt-1, in HFG27 was identified around RM3252 on chromosome 1. A QTL for leaf width, qLWnpt-2, in HKL75 was identified around RM7451 on chromosome 2. For leaf width, two QTLs, qLWnpt-4a, qLWnpt-4b, in HKL48 and HKL99 were identified around RM7208 and RM6909, respectively on chromosome 4. Results from this study suggest the possibilities to use marker-assisted selection and pyramiding these QTLs to improve rice water productivity.

Farooq M, Tagle AG, Santos RE, Ebron LA, Fujita D, Kobayashi N (2010) Quantitative Trait Loci mapping for leaf length and leaf width in rice cv. IR64 derived lines. J. Integr. Plant Biol. 52(6), 578–584.

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