alexa Molecular mapping of early vigour related QTLs in rice
ISSN: 2322-0066

Research & Reviews: Research Journal of Biology
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Research Article

Molecular mapping of early vigour related QTLs in rice

Jayateertha Diwan1*, Makanhally Channbyregowda1, Vinay Shenoy2, Prakash Salimath1 and Ramesh Bhat3

1Department of Genetics and Plant Breeding, College of Agriculture, Dharwad, UAS, Dharwad, Karnataka, India

2Barwale Foundation, Himayat Nagar, Hyderabad, India

3Insitute of Agri-Biotechnology, UAS, Dharwad, India

*Corresponding Author:
Jayateertha Diwan
Department of Genetics and Plant Breeding,
College of Agriculture, Dharwad, UAS,
Dharwad, Karnataka, India,
E-mail: [email protected]

Received: 29 May 2013 Accepted: 11 June 2013 Published: 16 June 2013

 
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Abstract

Upland rice plays a major role in the sustainable food security of the country. Early vigour trait is important in the drill-sown rice for weed suppression as well as initial establishment. The IR64/Azucena was used as a reference population to identify Quantitative Trait Loci (QTLs) for early vigour related traits. The Simple Sequence Repeat (SSR) markers flanking QTLs in IR64/Azucena and other populations were used for validation in the new populations (BPT5204/A67 and BPT5204/Dodiga). Twenty-two QTLs distributed on chromosomes 1 to 6 were identified for different vigour related traits. The QTLs controlling germination were located on chromosome 1 in the region RM5-RM306 near to alpha-amylase genes which controls germination. The congruence of QTLs was observed on Chromosome 5 in the region RM87-RM334 for rate of germination, seedling dry weight and vigour index. RM253 (Chromosome 6) was associated with the shoot length at 10th and 14th day after sowing (DAS) with 9.6% and 10.1% contribution in BPT5204/A67. RM178 (Chromosome 5) was associated with shoot length (18%) and root length (11.2%) at 10th DAS in BPT5204/Dodiga.

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