Mapping of quantitative trait loci for salt tolerance at the seedling stage in rice.
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.
Lee
Seung Yeob
SY
Rice Functional Genomics Team, National Institute of Agricultural Biotechnology, Suwon 441-707, Korea.
Ahn
Jeong Ho
JH
Cha
Young Soon
YS
Yun
Doh Won
DW
Lee
Myung Chul
MC
Ko
Jong Cheol
JC
Lee
Kyu Seong
KS
Eun
Moo Young
MY