Abstract
Grain moisture in maize at harvest depends on the grain drying rate (GDR) after physiological maturity. The maize plants with high GDR can reduce grain moisture rapidly, which will shorten the drying time after harvest and prevent the grain to be mildew and enhance maize quality. In this study, A total of 280 recombinant inbred lines that were derived from a cross between Ji846 (high drying rate, 1.18 % day−1) and Ye3189 (slow drying rate, 0.39 % day−1) were used to construct genetic linkage map and identify QTL underlying GDR in different environments. A genetic linkage map was constructed containing 97 SSR and 49 AFLP markers, which covered 2356.8 cM of the maize genome, with an average distance of 16.1 cM. Composite interval mapping identified 14 QTL for GDR after physiological maturity located on chromosomes 2, 3, 5, 6 and 8. The additive effects of QTL were all from Ji846. The range of phenotypic variation explained by the QTL was 5.05–16.28 %. But only two QTL (qKdr-2-1, qKdr-3-6) were identified across both locations. qKdr-2-1 positioned between the markers phi090-umc1560 on chromosome 2 explained 15.59 % of the phenotypic variance, and the other qKdr-3-6 positioned between the markers phi046-bnlg1754 on chromosome 3 explained 10.28 % of the phenotypic variance.
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Abbreviations
- QTL:
-
Quantitative trait locus
- GDR:
-
Grain drying rate
- CTAB:
-
Hexadecyl trimethyl ammonium bromide
- SSR:
-
Simple sequence repeats
- AFLP:
-
Amplified fragment length polymorphism
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Financial support for this work was provided in part by the Natural Science Foundation of China (30571166), Post-doctoral research start-up capital (Post Doc Research Found BH-Q06099) and the Program for the graduate training of Heilongjiang province.
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Wang, Z., Wang, X., Zhang, L. et al. QTL underlying field grain drying rate after physiological maturity in maize (Zea Mays L.). Euphytica 185, 521–528 (2012). https://doi.org/10.1007/s10681-012-0676-2
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DOI: https://doi.org/10.1007/s10681-012-0676-2