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    Barriers to interspecific hybridization between Vigna unguiculata and Vigna vexillata

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    Date
    1992
    Author
    Barone, A.
    Giudice, A. del
    Ng, N.Q.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Interspecific hybridization between Vigna unguiculata and V. vexillata always failed: no seed was obtained in both crossing directions. Two different barriers to crossability were found: a pre-zygotic barrier and a post-zygotic one. Many abnormalities were observed in pollen-tube development, which reduced the percentage of fertilization to 18–30%. Differences in the percentage of fertilization were detected between the two accessions of V. vexillata involved in the interspecific crosses. The development of the interspecific embryo was analyzed and the embryo and endosperm nuclei always degenerated 5–8 days after pollination. The growth of the embryo stopped at a globular stage, which is too early for excision and in vitro culturing.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5312
    IITA Subjects
    Cowpea
    Agrovoc Terms
    Interspecific Hybridization; Vigna Unguiculata; Vigna Vexillata
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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