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Rapid Evolution of Assortative Fertilization between Recently Allopatric Species of Drosophila
Joint Authors
Ahmed-Braimah, Yasir H.
McAllister, Bryant F.
Source
International Journal of Evolutionary Biology
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-01-18
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The virilis group of Drosophila represents a relatively unexplored but potentially useful model to investigate the genetics of speciation.
Good resolution of phylogenetic relationships and the ability to obtain fertile hybrid offspring make the group especially promising for analysis of genetic changes underlying reproductive isolation separate from hybrid sterility and inviability.
Phylogenetic analyses reveal a close relationship between the sister species, Drosophila americana and D.
novamexicana, yet excepting their contemporary allopatric distributions, factors that contribute to reproductive isolation between this species pair remain uncharacterized.
A previous report has shown reduced progeny numbers in laboratory crosses between the two species, especially when female D.
novamexicana are crossed with male D.
americana.
We show that the hatch rate of eggs produced from heterospecific matings is reduced relative to conspecific matings.
Failure of eggs to hatch, and consequent reduction in hybrid progeny number, is caused by low fertilization success of heterospecific sperm, thus representing a postmating, prezygotic incompatibility.
Following insemination, storage and motility of heterospecific sperm is visibly compromised in female D.
novamexicana.
Our results provide evidence for a mechanism of reproductive isolation that is seldom reported for Drosophila species, and indicate the rapid evolution of postmating, prezygotic reproductive barriers in allopatry.
American Psychological Association (APA)
Ahmed-Braimah, Yasir H.& McAllister, Bryant F.. 2012. Rapid Evolution of Assortative Fertilization between Recently Allopatric Species of Drosophila. International Journal of Evolutionary Biology،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-460377
Modern Language Association (MLA)
Ahmed-Braimah, Yasir H.& McAllister, Bryant F.. Rapid Evolution of Assortative Fertilization between Recently Allopatric Species of Drosophila. International Journal of Evolutionary Biology No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-460377
American Medical Association (AMA)
Ahmed-Braimah, Yasir H.& McAllister, Bryant F.. Rapid Evolution of Assortative Fertilization between Recently Allopatric Species of Drosophila. International Journal of Evolutionary Biology. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-460377
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-460377