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The Plant Genome Abstract - Original Research

Cowpea–Soybean Synteny Clarified through an Improved Genetic Map


This article in TPG

  1. Vol. 4 No. 3, p. 218-225
    unlockOPEN ACCESS
    Received: June 29, 2011

    * Corresponding author(s): mitchell.lucas@email.ucr.edu
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  1. Mitchell R. Lucas ,
  2. Ndeye-Ndack Diop,
  3. Steve Wanamaker,
  4. Jeffery D. Ehlers,
  5. Philip A. Roberts and
  6. Timothy J. Close
  1. M.R. Lucas, N.-N. Diop, S. Wanamaker, J.D. Ehlers, and T.J. Close, Dep. of Botany and Plant Sciences; and P.A. Roberts, Dep. of Nematology, Univ. of California, Riverside, CA 92521


Linkage mapping is relevant to modern plant biology and provides a framework for downstream analyses including quantitative trait loci identification, map-based cloning, assessment of diversity, association mapping, and molecular breeding. Here, we report a consensus genetic map of cowpea [Vigna unguiculata (L.) Walp.] and synteny to other legumes based on expressed sequence tag (EST)-derived single nucleotide polymorphisms (SNPs). In total, 1293 individuals representing 13 mapping populations were genotyped using an Illumina 1536 GoldenGate Assay. A consensus map containing 1107 EST-derived SNP markers (856 bins) on 11 linkage groups (680 cM) was constructed from 13 population-specific maps. This effort combined six new population-specific maps and seven revised population-specific maps to construct an improved consensus map with 33% more bins, 19% more markers, and improved marker order when compared to the previous cowpea SNP consensus map. Comparative and whole genome visualizations are presented as a framework for discussing map quality and synteny with soybean [Glycine max (L.) Merr.].

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