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Markers Associated with Culm Length and Elongated Internode Length in Japonica Rice
Author(s) -
Wang Jingguo,
Gang Shuang,
Yang Liang,
Zheng Hongliang,
Sun Jian,
Liu Hualong,
Zhao Hongwei,
Zou Detang
Publication year - 2017
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2016.06.0533
Subject(s) - biology , japonica , oryza sativa , quantitative trait locus , panicle , allele , japonica rice , horticulture , genetics , genotype , botany , gene
Culm length (CL) is composed of different elongated internode lengths (EILs) and is closely correlated to the lodging resistance in rice ( Oryza sativa L.). The objective of this study was to identify quantitative trait loci (QTLs) stably associated with CL and the first to fourth EIL from panicle base, which were abbreviated as FIL (first), SIL (second), TIL (third), and FOIL (fourth) in japonica rice, respectively. Association mapping was conducted using the genotypes determined by 154 simple sequence repeat markers and the phenotypes in 2010, 2011, and 2015 of 331 japonica rice accessions. The study mapped 6, 5, 15, 2, and 2 QTLs tagged by 22 markers on eight chromosomes and stably associated with CL, FIL, SIL, TIL, and FOIL, respectively. Five QTLs, qCL‐6‐2 , qFIL‐6‐5 , qSIL‐6‐2 , qTIL‐6‐3 , and qFOIL‐7‐5 , explained the largest phenotypic variance of CL, FIL, SIL, TIL, and FOIL, respectively. RM1340, RM1374, RM281, RM233, and RM225 were stably and specifically associated with CL, FIL, SIL, TIL, and FOIL, respectively. Forty‐three effective alleles were identified. Four and three donors with negative and positive alleles were recommended. There was a highly significant phenotypic difference between accessions with or without effective alleles. These QTLs, associated markers, effective alleles, and their donors could be used to improve CL and specific EIL in japonica rice.