NDLI: QUANTITATIVE TRAIT LOCI INFLUENCING DROUGHT TOLERANCE IN RICE ( Oryza sativa

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QUANTITATIVE TRAIT LOCI INFLUENCING DROUGHT TOLERANCE IN RICE ( Oryza sativa

Content Provider	Semantic Scholar
Author	Lang, Nguyễn Thị
Copyright Year	2010
Abstract	SSR technique combined with selective genotyping was used to map quantitative trait loci (QTLs) associated with drought tolerance in rice. Two hundred twenty nine (BC2F2) derived from the cross between OM1490 / WAB880-1-38-18-20-P1-HB were evaluated for drought at flowering (DRF), root dry weigh (RDW), and root length (RL). Microsetellite map of this population was used with 232 markers to detect the linkage to the target traits. A linkage map was constructed from 12-linkage groups based on the population. The map covers 2,553.7 cM with an average interval of 10.97 cM between marker loci. Markers associated with drought tolerance were located mostly on chromosomes 2, 3, 4, 8, 9, 10 and 12. QTL mapping was used to determine effects of loci associated with drought tolerance traits. We also mapped QTLs for morphological attributes related to drought tolerance. Chi-square tests (χ 2 ), single maker analysis (SMA), interval mapping (IM) were combined in the QTL analysis procedure. All approaches used for QTL detection gave similar results. Five QTLs were identified for DT(Drought Tolerance), two QTLs for RL, two QTLs for RDW. The proportion of phenotypic variation explained by each QTL ranged from 20.73% to 30.77% for DR, and from 6.23 to 3.39% for morphological characters related to drought at flowering. This study has provided detailed information on the relative importance of marker assisted selection of drought tolerance.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.clrri.org/ver2/uploads/noidung/17-3.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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