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Paternal leakage of mitochondrial DNA in experimental crosses of populations of the potato cyst nematode Globodera pallida

Journal Article


Abstract


  • Animal mtDNA is typically assumed to be

    maternally inherited. Paternal mtDNA has been shown to

    be excluded from entering the egg or eliminated post-fertilization

    in several animals. However, in the contact zones

    of hybridizing species and populations, the reproductive

    barriers between hybridizing organisms may not be as

    efficient at preventing paternal mtDNA inheritance,

    resulting in paternal leakage. We assessed paternal mtDNA

    leakage in experimental crosses of populations of a cystforming

    nematode, Globodera pallida. A UK population,

    Lindley, was crossed with two South American populations,

    P5A and P4A. Hybridization of these populations

    was supported by evidence of nuclear DNA from both the

    maternal and paternal populations in the progeny. To assess

    paternal mtDNA leakage, a *3.4 kb non-coding mtDNA

    region was analyzed in the parental populations and in the

    progeny. Paternal mtDNA was evident in the progeny of

    both crosses involving populations P5A and P4A. Further,

    paternal mtDNA replaced the maternal mtDNA in 22 and

    40 % of the hybrid cysts from these crosses, respectively.

    These results indicate that under appropriate conditions,

    paternal leakage occurs in the mtDNA of parasitic nematodes,

    and supports the hypothesis that hybrid zones

    facilitate paternal leakage. Thus, assumptions of strictly maternal mtDNA inheritance may be frequently violated,

    particularly when divergent populations interbreed.

Publication Date


  • 2011

Citation


  • Hoolahan, A. H., Blok, V. C., Gibson, T. & Dowton, M. (2011). Paternal leakage of mitochondrial DNA in experimental crosses of populations of the potato cyst nematode Globodera pallida. Genetica: the international journal on genetics, 139 (11-12), 1509-1519.

Scopus Eid


  • 2-s2.0-84861006974

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4403

Number Of Pages


  • 10

Start Page


  • 1509

End Page


  • 1519

Volume


  • 139

Issue


  • 11-12

Abstract


  • Animal mtDNA is typically assumed to be

    maternally inherited. Paternal mtDNA has been shown to

    be excluded from entering the egg or eliminated post-fertilization

    in several animals. However, in the contact zones

    of hybridizing species and populations, the reproductive

    barriers between hybridizing organisms may not be as

    efficient at preventing paternal mtDNA inheritance,

    resulting in paternal leakage. We assessed paternal mtDNA

    leakage in experimental crosses of populations of a cystforming

    nematode, Globodera pallida. A UK population,

    Lindley, was crossed with two South American populations,

    P5A and P4A. Hybridization of these populations

    was supported by evidence of nuclear DNA from both the

    maternal and paternal populations in the progeny. To assess

    paternal mtDNA leakage, a *3.4 kb non-coding mtDNA

    region was analyzed in the parental populations and in the

    progeny. Paternal mtDNA was evident in the progeny of

    both crosses involving populations P5A and P4A. Further,

    paternal mtDNA replaced the maternal mtDNA in 22 and

    40 % of the hybrid cysts from these crosses, respectively.

    These results indicate that under appropriate conditions,

    paternal leakage occurs in the mtDNA of parasitic nematodes,

    and supports the hypothesis that hybrid zones

    facilitate paternal leakage. Thus, assumptions of strictly maternal mtDNA inheritance may be frequently violated,

    particularly when divergent populations interbreed.

Publication Date


  • 2011

Citation


  • Hoolahan, A. H., Blok, V. C., Gibson, T. & Dowton, M. (2011). Paternal leakage of mitochondrial DNA in experimental crosses of populations of the potato cyst nematode Globodera pallida. Genetica: the international journal on genetics, 139 (11-12), 1509-1519.

Scopus Eid


  • 2-s2.0-84861006974

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4403

Number Of Pages


  • 10

Start Page


  • 1509

End Page


  • 1519

Volume


  • 139

Issue


  • 11-12