Indian Society of Genetics & Plant Breeding

Identification of QTL associated with silicon and zinc content in rice (Oryza sativa L.) and their role in blast disease resistance

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aTL associated with zinc (Zn) and silicon (Si) content in
rice were identified and mapped on different rice
chromosomes. Based on interval mapping, a aTL was
detected for silicon content on chromosome three and
this aTL showed positive additive effect of 0.054 and
explained 12.9% phenotypic variation. Additionally, single
marker analysis results identified eighteen aTL for silicon
content on different chromosomes. Similarly, a total of
six aTL were identified for zinc content in rice seeds
using single marker analysis and mapped one each on
chromosome number 1, 4, 5, 8, 9 and 11. These aTL
individually explained 4.4% to 9.5% phenotypic variation.
The identified aTL were mapped on chromosome regions
having blast resistance aTL and candidate genes for blast
resistance. The overlapping of silicon and zinc aTL and
disease resistance loci on same chromosome regions
suggested their positive role in blast disease resistance.

Keywords: Silicon, zinc, mapping, micronutrients and quantitative trait loci.


Year: 2007
Volume: 67
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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