This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.
Mapping quantitative trait loci for cold tolerance at the booting stage in rice using chromosome segment substitution lines
Low temperature at the booting stage can cause male sterility resulting in yield losses. A set of chromosome segment substitution lines (CSSLs) derived from Sasanishiki (cold tolerant japonica ssp.) and Habataki (cold susceptible indica spp.) were used for analysis across two natural low temperature environments to study the genetic basis for cold tolerance at the booting stage. Spikelet fertility was used as the evaluation index for cold tolerance identification. Eight quantitative trait loci (QTLs) for cold tolerance were detected, of which, 2 QTLs qCTSF3.1 and qCTSF3.2 were located on chromosomes 3, the others qCTSF4, qCTSF5, qCTSF6, qCTSF7, qCTSF8, and qCTSF9 were on chromosomes 4, 5, 6, 7, 8, and 9, respectively. The phenotypic variation explained by each QTL ranged from 5.4% to 25.3%. Of the 8 QTLs, 6 (qCTSF3.2, qCTSF5, qCTSF6, qCTSF7, qCTSF8, and qCTSF9) were repeatedly detected in two environments. qCTSF3.1, qCTSF7, and qCTSF9 were overlapped with previously reported QTLs. All tolerant alleles for all QTLs were contributed by Sasanishiki.
CP17329 Accepted 22 November 2017
© CSIRO 2017