Detection of Whole-Genome Resequencing-Based QTLs Associated Pre-Harvest Sprouting in Rice (Oryza sativa L.)

다국어 초록 (Multilingual Abstract)

Pre-harvest sprouting (PHS) is one of the important traits that not only cause serious economic issues but also lead toreduction in grain quality and yield in rice (Oryza sativa L.). To analyze the quantitative trait loci (QTLs) for PHS tolerance, weevaluated PHS, seed dormancy (SD), and low-temperature germination (LTG) of 88 F2:3 populations and their parental lines. Genotypicanalysis was performed by using 441 single nucleotide polymorphisms (SNPs) detected from re-sequencing data. Seed dormancy (SD)and low-temperature germination (LTG) were identified to exhibit a positive correlation with PHS. Under the field condition, two majorQTLs for PHS, qPHS1-1FCand qPHS1-2FCwere identified on chromosome 1. Under the growth chamber condition, qPHS1-1GCandqPHS1-2GChad the same regions on chromosome 1. QTLs of SD and LTG (qSD1-1, qSD1-2, qLTG1-1, and qLTG1-2) had the sameregions; these results suggested that candidate QTLs demonstrate pleiotropy about PHS, SD, and LTG. The major QTLs detected in thisstudy are hypothesized to provide an important resource for molecular breeding and gain a better understanding of the genetics of traitsin rice.

참고문헌 (Reference)

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