title: Mapping of quantitative trait loci for salt tolerance at the seedling stage in rice.
abstract: Salt tolerance was evaluated at the young seedling stage of rice (Oryza sativa L.) using recombinant inbred lines (MG RILs) from a cross between Milyang 23 (japonica/indica) and Gihobyeo (japonica). 22 of 164 MG RILs were classified as tolerant with visual scores of 3.5-5.0 in 0.7% NaCl. Interval mapping of QTLs related to salt tolerance was conducted on the basis of the visual scores at the young seedling stage. Two QTLs, qST1 and qST3, conferring salt tolerance, were detected on chromosome 1 and 3, respectively, and the total phenotypic variance explained by the two QTLs was 36.9% in the MG RIL population. qST1 was the major QTL explaining 27.8% of the total phenotypic variation. qST1 was flanked by Est12-RZ569A, and qST3 was flanked by RG179-RZ596. The detection of new QTLs associated with salt tolerance will provide important information for the functional analysis of rice salt tolerance.
authors: Rice Functional Genomics Team, National Institute of Agricultural Biotechnology, Suwon 441-707, Korea.
authors: Seung Yeob
authors: SY
authors: Lee
authors: Jeong Ho
authors: JH
authors: Ahn
authors: Young Soon
authors: YS
authors: Cha
authors: Doh Won
authors: DW
authors: Yun
authors: Myung Chul
authors: MC
authors: Lee
authors: Jong Cheol
authors: JC
authors: Ko
authors: Kyu Seong
authors: KS
authors: Lee
authors: Moo Young
authors: MY
authors: Eun