Mapping of QTLs for Brown Rice Traits Based on Chromosome Segment Substitution Line in Rice (Oryza sativa L.)

Brown rice traits are critical to both grain yield and quality. In the present study, chromosome segment substitution lines (CSSLs) population derived from a cross between japonica Koshihikari indica Nona Bokra was used analyze brown length (BRL), width (BRW), length–width ratio of (BLWR), thickness (BRT), perimeter (BRP), area (BRA), thousand-grain weight (BRGW), (BRR), taste value (BTV), water content (BWC). Correlations analysis showed that most had significant correlations with each other, except for BRR, BTV, BWC. A total sixty-one QTLs these were identified under three environments, which mapped chromosomes 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, LOD ranging 2.52 16.68 accounting 2.60 25.38% phenotypic variations. Moreover, thirty pairs epistatic interactions BRL, BRW, BLWR, BRP, BRA estimated distributed on all 10. These findings will provide further understanding genetic basis facilitate improvement quality through breeding.