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PATTERNS OF REPRODUCTIVE ISOLATION IN NOLANA (CHILEAN BELLFLOWER)
Author(s) -
Jewell Cathleen,
Papineau Amy Douglas,
Freyre Rosanna,
Moyle Leonie C.
Publication year - 2012
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.2012.01607.x
Subject(s) - reproductive isolation , biology , sympatric speciation , gene flow , isolation (microbiology) , evolutionary biology , sympatry , character displacement , zoology , ecology , genetic variation , genetics , gene , population , demography , sociology , microbiology and biotechnology
We examined reproductive isolating barriers at four postmating stages among 11 species from the morphologically diverse genus Nolana (Solanaceae). At least one stage was positively correlated with both genetic and geographic distance between species. Postzygotic isolation was generally stronger and faster evolving than postmating prezygotic isolation. In addition, there was no evidence for mechanical isolation, or for reproductive character displacement in floral traits that can influence pollinator isolation. In general, among the potential isolating stages examined here, postzygotic barriers appear to be more effective contributors to reducing gene flow, including between sympatric species.