Indian Society of Genetics & Plant Breeding

Identification of QTLs for cold tolerance at seedling stage in rice (Oryza sativa L.)

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Rice is a cold sensitive plant. During off-season cultivation
this crop experiences cold at seedling stage. The present
study was based on 122 RILs in F13 generation developed
by single-seed descent method from a cross between two
indica cultivars Danteshwari and Dagad deshi. Screening
was conducted during December 2012-January 2013 with
seven replications at seedling stage. The genotypes
exhibited marked variation for cold tolerance, with an
average of 3.52 score on 1-9 scale and 0.62 broad sense
heritability. Genotypic data of this population was
developed using 161 SSR markers. A total of 5 QTLs were
identified on chromosome 1, 3, 6, 9 and 12. QTL present on
chromosome 9 had major effect with LOD value of 9.53 and
located between HvSSR 9-7 to HvSSR 9-19. These QTLs will
be helpful to facilitate the development of novel cold
tolerant cultivars using molecular breeding.

Keywords: Rice (Oryza sativa L.), seedling stage, cold tolerance, QTLs


Year: 2014
Volume: 74
Issue: 1
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906


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