Identification of quantitative trait loci for leaf traits in rice

Abstract

A recombinant inbred lines (RILs) population of 90 lines were developed from a subspecies cross between an indica type cultivar, 'Cheongcheong', and a japonica rice cultivar, 'Nagdong' was evaluated for leaf traits in 2009. A genetic linkage map consisting of 154 simple sequence repeat (SSR) markers was constructed, covering 1973.6 cM of 12 chromosomes with an average map distance of 13.9 cM between markers. By composite interval mapping method a total of 19 QTLs were identified for the leaf traits on 5 chromosomes (Chr.1, Chr.3, Chr.6, Chr.8 and Chr.11). The percentage of phenotypic variance explained by each QTL varied from 8.1% to 29.4%. Five pleiotropic effects loci were identified on chromosomes 1,6.