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    Sequencing wild and cultivated cassava and related species reveals extensive interspecific hybridization and genetic diversity

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    U16ArtBredesonSequencingInthomDev.pdf (1.935Mb)
    Date
    2016-04-18
    Author
    Bredeson, J.V.
    Lyons, J.B.
    Prochnik, S.E.
    Wu, G.A.
    Ha, C.M.
    Edsinger-Gonzales, E.
    Grimwood, J.
    Schmutz, J.
    Rabbi, Ismail Y
    Egezi, C.
    Nauluvula, P.
    Lebot, V.
    Ndunguru, J.
    Mkamilo, G.S.
    Bart, R.S.
    Setter, T.L.
    Gleadow, R.M.
    Kulakow, P.A.
    Ferguson, M.
    Rounsley, S.
    Rokhsar, D.S.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Cassava (Manihot esculenta) provides calories and nutrition for more than half a billion people. It was domesticated by native Amazonian peoples through cultivation of the wild progenitor M. esculenta ssp. flabellifolia and is now grown in tropical regions worldwide. Here we provide a high-quality genome assembly for cassava with improved contiguity, linkage, and completeness; almost 97% of genes are anchored to chromosomes. We find that paleotetraploidy in cassava is shared with the related rubber tree Hevea, providing a resource for comparative studies. We also sequence a global collection of 58 Manihot accessions, including cultivated and wild cassava accessions and related species such as Ceará or India rubber (M. glaziovii), and genotype 268 African cassava varieties. We find widespread interspecific admixture, and detect the genetic signature of past cassava breeding programs. As a clonally propagated crop, cassava is especially vulnerable to pathogens and abiotic stresses. This genomic resource will inform future genome-enabled breeding efforts to improve this staple crop.
    https://dx.doi.org/10.1038/nbt.3535
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/963
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1038/nbt.3535
    IITA Subjects
    Cassava
    Agrovoc Terms
    Plant Breeding; Plant Domestication; Plant Genetics
    Countries
    Nigeria
    Journals
    Nature Biotechnology
    Collections
    • Journal and Journal Articles4835
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