Journal
EVOLUTIONARY ECOLOGY
Volume 29, Issue 2, Pages 229-248Publisher
SPRINGER
DOI: 10.1007/s10682-015-9753-z
Keywords
Hybridization meiotic behavior; Orchidaceae; Environmental envelope models; Reproductive isolation; Speciation
Categories
Funding
- FAPESP [2009/15052-0, 2010/16353-1, 2011/22215-3, 2012/22077-2]
- PNPD/CAPES fellowship
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [11/22215-3, 12/22077-2] Funding Source: FAPESP
Ask authors/readers for more resources
Studies on hybrid zones are essential to understand the origin and evolution of reproductive barriers in plants. To achieve this goal, multidisciplinary approaches are often required to investigate the role of multiple reproductive isolation (RI) mechanisms. For Epidendrum denticulatum and E. fulgens, two Neotropical food-deceptive orchid species, we used molecular, cytogenetic and morphological analyses, experimental crosses and environmental envelope models to assess the strength of the RI and the mechanisms that prevent species collapse when hybridization occurs. Based on genetic assignment tests, hybrids between E. denticulatum and E. fulgens were detected. However, the low frequency of hybrid specimens found, coupled with the high morphological differentiation between parental species, suggested that strong barriers exist to interspecific gene exchange. Indeed, hybrid plants were largely sterile, as determined by meiotic data and crossing experiments. In the hybrid zone studied here, strong postzygotic barriers maintain species integrity, and these RI mechanisms may be also important during early stages of speciation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available