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TitleA High-Density Genetic Recombination Map of Sequence-Tagged Sites for Sorghum, as a Framework for Comparative Structural and Evolutionary Genomics of Tropical Grains and Grasses
AuthorsJohn E. Bowers, Colette Abbey, Sharon Anderson, Charlene Chang, Xavier Draye, Alison H. Hoppe, Russell Jessup, Cornelia Lemke, Jennifer Lennington, Zhikang Li, Yann-rong Lin, Sin-chieh Liu, Lijun Luo, Barry S. Marler, Reiguang Ming, Sharon E. Mitchell, Dou Qiang, Kim Reischmann, Stefan R. Schulze, D. Neil Skinner, Yue-wen Wang, Stephen Kresovich, Keith F. Schertz and Andrew H. Paterson
Year2003
Taxonsorghum
PDFrecom_map_sorghum.pdf
PublicationGenetics 165: 367-386
Journal_link
Publisher_note
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AbstractWe report a genetic recombination map for Sorghum of 2512 loci spaced at average 0.4 cM (300 kb) intervals based on 2050 RFLP probes, including 865 heterologous probes that foster comparative genomics of Saccharum (sugarcane), Zea (maize), Oryza (rice), Pennisetum (millet, buffelgrass), the Triticeae (wheat, barley, oat, rye), and Arabidopsis. Mapped loci identify 61.5% of the recombination events in this progeny set and reveal strong positive crossover interference acting across intervals of 50 cM. Significant variations in DNA marker density are related to possible centromeric regions and to probable chromosome structural rearrangements between Sorghum bicolor and S. propinquum, but not to variation in levels of intraspecific allelic richness. While cDNA and genomic clones are similarly distributed across the genome, SSR-containing clones show different abundance patterns. Rapidly evolving hypomethylated DNA may contribute to intraspecific genomic differentiation. Nonrandom distribution patterns of multiple loci detected by 357 probes suggest ancient chromosomal duplication followed by extensive rearrangement and gene loss. Exemplifying the value of these data for comparative genomics, we support and extend prior findings regarding maize/sorghum synteny

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.: 2009 :: Barry Marler :: Plant Genome Mapping Laboratory :: University of Georgia