Identification of QTLs for phenolic compounds in oilseed rape (<Emphasis Type="Italic">Brassica napus L.</Emphasis>) by association mapping using SSR markers |
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| Authors: | Abbas Rezaeizad Benjamin Wittkop Rod Snowdon Maen Hasan Valiollah Mohammadi Abbas Zali Wolfgang Friedt |
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| Institution: | (1) Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Tehran, Iran;(2) Department of Plant Breeding, Justus Liebig University, Giessen, Germany;(3) Technology, Al-Balqa, Applied University, 119117 Al-Salt, Jordan; |
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| Abstract: | Association mapping identifies quantitative trait loci (QTLs) by examining the marker-trait associations that can be attributed
to the strength of linkage disequilibrium between markers and functional polymorphisms across a set of diverse germplasm.
In this study, association mapping was performed to detect QTL-linked and genome wide SSR markers linked to phenolic compounds
of extraction meal in a population of 49 genetically diverse oilseed rape cultivars of dark-seeded, winter-type oilseed rape
accessions. Correction for population structure was performed using 559 genome wide SSR markers. Results showed that seed
colour is an important contributor to seed meal quality. Totally, 52 SSR markers linked to phenolic compounds were detected,
five of them being QTL linked markers. Some of these markers were already mapped on Brassica napus chromosomes that contain known QTL controlling oilseed rape meal quality traits. Our results demonstrate that association
mapping is a useful approach to complement and enhance previous QTL information for marker-assisted selection. |
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