Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization
Abstract. Gamete interactions may strongly influence speciation and hybridization in sympatric broadcast-spawning marine invertebrates. We examined the role of gamete compatibility in species integrity using cross-fertilization studies between sympatric Asterias sea stars from a secondary contact zo...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.318.5383 2023-05-15T17:45:37+02:00 Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization Between Sympatric Asterias Sea Stars F. M. Harper M. W. Hart The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.5383 http://www.biolbull.org/content/209/2/113.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.5383 http://www.biolbull.org/content/209/2/113.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.biolbull.org/content/209/2/113.full.pdf text ftciteseerx 2016-09-04T00:12:22Z Abstract. Gamete interactions may strongly influence speciation and hybridization in sympatric broadcast-spawning marine invertebrates. We examined the role of gamete compatibility in species integrity using cross-fertilization studies between sympatric Asterias sea stars from a secondary contact zone in the northwest Atlantic. In crosses between single males and single females, gametes of both species were compatible and produced viable, fertile hybrid offspring, but with considerable variation in the receptivity of eggs to heterospecific sperm. Differential compatibility of heterospecific gametes was detected in sperm competition studies in which we used a nuclear DNA marker to assign paternity to larval offspring. Several families showed conspecific sperm precedence in A. forbesi eggs, and one family showed competitive superiority of A. forbesi sperm fertilizing A. rubens eggs. Gametic interactions are an important component of prezygotic reproductive isolation in sympatric Asterias. The interaction between gametes of these closely related sea stars is consistent with the function of gamete recognition systems that are known to mediate fertilization success and speciation in other marine invertebrates. Text Northwest Atlantic Unknown |
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Abstract. Gamete interactions may strongly influence speciation and hybridization in sympatric broadcast-spawning marine invertebrates. We examined the role of gamete compatibility in species integrity using cross-fertilization studies between sympatric Asterias sea stars from a secondary contact zone in the northwest Atlantic. In crosses between single males and single females, gametes of both species were compatible and produced viable, fertile hybrid offspring, but with considerable variation in the receptivity of eggs to heterospecific sperm. Differential compatibility of heterospecific gametes was detected in sperm competition studies in which we used a nuclear DNA marker to assign paternity to larval offspring. Several families showed conspecific sperm precedence in A. forbesi eggs, and one family showed competitive superiority of A. forbesi sperm fertilizing A. rubens eggs. Gametic interactions are an important component of prezygotic reproductive isolation in sympatric Asterias. The interaction between gametes of these closely related sea stars is consistent with the function of gamete recognition systems that are known to mediate fertilization success and speciation in other marine invertebrates. |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
author |
Between Sympatric Asterias Sea Stars F. M. Harper M. W. Hart |
spellingShingle |
Between Sympatric Asterias Sea Stars F. M. Harper M. W. Hart Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization |
author_facet |
Between Sympatric Asterias Sea Stars F. M. Harper M. W. Hart |
author_sort |
Between Sympatric |
title |
Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization |
title_short |
Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization |
title_full |
Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization |
title_fullStr |
Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization |
title_full_unstemmed |
Gamete Compatibility and Sperm Competition Affect Paternity and Hybridization |
title_sort |
gamete compatibility and sperm competition affect paternity and hybridization |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.5383 http://www.biolbull.org/content/209/2/113.full.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
http://www.biolbull.org/content/209/2/113.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.318.5383 http://www.biolbull.org/content/209/2/113.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766148771112026112 |