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Molecular mapping of quantitative trait loci for grain moisture at harvest in maize
Author(s) -
Song Wei,
Shi Zi,
Xing Jinfeng,
Duan Minxiao,
Su Aiguo,
Li Chunhui,
Zhang Ruyang,
Zhao Yanxin,
Luo Meijie,
Wang Jidong,
Zhao Jiuran
Publication year - 2017
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12430
Subject(s) - quantitative trait locus , biology , heritability , doubled haploidy , population , sowing , agronomy , trait , genetics , gene , demography , sociology , computer science , programming language
In maize, high grain moisture ( GM ) at harvest causes problems in harvesting, threshing, artificial drying, storage, transportation and processing. Understanding the genetic basis of GM will be useful for breeding low‐ GM varieties. A quantitative genetics approach was used to identify quantitative trait loci ( QTL ) related to GM at harvest in field‐grown maize. The GM of a double haploid population consisting of 240 lines derived from Xianyu335 was evaluated in three planting seasons and a high‐density genetic linkage map covering 1546.4 cM was constructed. The broad‐sense heritability of GM at harvest was 71.0%. Using composite interval mapping, six QTL for GM at harvest were identified on five chromosomes (Chr). Two QTL located on Chr1, qgm1‐1 and qgm1‐2 , explained 5.0% and 10.8% of the phenotypic variation in GM at harvest, respectively. The QTL qgm2 , qgm3 , qgm4 and qgm5 accounted for 3.3%, 8.3%, 5.4% and 11.0% of the mean phenotypic variation, respectively. Because of their consistent detection over multiple planting seasons, the detected QTL appear to be robust and reliable for the breeding of low‐ GM varieties.

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