Journal
DNA RESEARCH
Volume 19, Issue 1, Pages 51-65Publisher
OXFORD UNIV PRESS
DOI: 10.1093/dnares/dsr041
Keywords
Diversity Array Technology; genetic diversity; genetic linkage mapping; Brassica species; rapeseed
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Funding
- NSW Agricultural Genomic Centre under BioFirst Initiative of NSW Government
- DArT International Rapeseed Consortium
- Australian Research Council [LP0210571]
- Council of Grain Grower Organizations Ltd (Australia)
- Norddeutsche Pflanzenzucht Hans-Georg Lembke KG (Germany)
- Australian Research Council [LP0210571] Funding Source: Australian Research Council
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We developed Diversity Array Technology (DArT) markers for application in genetic studies of Brassica napus and other Brassica species with A or C genomes. Genomic representation from 107 diverse genotypes of B. napus L. var. oleifera (rapeseed, AACC genomes) and B. rapa (AA genome) was used to develop a DArT array comprising 11 520 clones generated using Pstl/Banll and Pstl/BstN1 complexity reduction methods. In total, 1547 polymorphic DArT markers of high technical quality were identified and used to assess molecular diversity among 89 accessions of B. napus, B. rapa, B. juncea, and B. carinata collected from different parts of the world. Hierarchical cluster and principal component analyses based on genetic distance matrices identified distinct populations clustering mainly according to their origin/pedigrees. DArT markers were also mapped in a new doubled haploid population comprising 131 lines from a cross between spring rapeseed lines 'Lynx-037DH' and 'Monty-028DH'. Linkage groups were assigned on the basis of previously mapped simple sequence repeat (SSRs), intron polymorphism (IP), and gene-based markers. The map consisted of 437 DArT, 135 SSR, 6 IP, and 6 gene-based markers and spanned 2288 cM. Our results demonstrate that DArT markers are suitable for genetic diversity analysis and linkage map construction in rapeseed.
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