6 Works

Data from: Rapid evolution of asymmetric reproductive incompatibilities in stalk-eyed flies

Emily G. Rose, Cara L. Brand & Gerald S. Wilkinson
The steps by which isolated populations acquire reproductive incompatibilities remain poorly understood. One potentially important process is postcopulatory sexual selection because it can generate divergence between populations in traits that influence fertilization success after copulation. Here we present a comprehensive analysis of this form of reproductive isolation by conducting reciprocal crosses between variably diverged populations of stalk-eyed flies (Teleopsis dalmanni). First, we measure seven types of reproductive incompatibility between copulation and fertilization. We then compare...

Data from: Cuticular hydrocarbon divergence in the jewel wasp Nasonia: evolutionary shifts in chemical communication channels?

Jan Buellesbach, Juergen Gadau, Leo W. Beukeboom, Felix Echinger, Rhitoban Raychoudhury, Jack H. Werren & Thomas Schmitt
The evolution and maintenance of intraspecific communication channels constitutes a key feature of chemical signaling and sexual communication. However, how divergent chemical communication channels evolve while maintaining their integrity for both sender and receiver is poorly understood. In the present study, we compare male and female cuticular hydrocarbon (CHC) profiles in the jewel wasp genus Nasonia, analyze their chemical divergence, and investigate their role as species-specific sexual signaling cues. Males and females of all four...

Data from: Anolis sex chromosomes are derived from a single ancestral pair

Tony Gamble, Anthony J. Geneva, Richard E. Glor & David Zarkower
To explain the frequency and distribution of heteromorphic sex chromosomes in the lizard genus Anolis we compared the relative roles of sex chromosome conservation vs. turnover of sex determining mechanisms. We used model based comparative methods to reconstruct karyotype evolution and the presence of heteromorphic sex chromosomes onto a newly generated Anolis phylogeny. We found that heteromorphic sex chromosomes evolved multiple times in the genus. Fluorescent in situ hybridization (FISH) of repetitive DNA showed variable...

Data from: Diversification rates have declined in the Malagasy herpetofauna

Daniel P. Scantlebury
The evolutionary origins of Madagascar's biodiversity remain mysterious despite the fact that relative to land area, there is no other place with consistently high levels of species richness and endemism across a range of taxonomic levels. Most efforts to explain diversification on the island have focused on geographical models of speciation, but recent studies have begun to address the island's accumulation of species through time, although with conflicting results. Prevailing hypotheses for diversification on the...

Data from: Using genomic data to revisit a classic example of reproductive character displacement in Haitian Anolis lizards

Shea M. Lambert, Anthony J. Geneva, D. Luke Mahler & Richard E. Glor
The pattern of reproductive character displacement (RCD)—in which traits associated with reproductive isolation are more different where two species occur together than where they occur in isolation—is frequently attributed to reinforcement, a process during which natural selection acting against maladaptive mating events leads to enhanced prezygotic isolation between species or incipient species. One of the first studies of RCD to include molecular genetic data was described 40 years ago in a complex of Haitian trunk...

Data from: Dynamics of the continent-wide spread of a Drosophila defensive symbiont

Sarah N. Cockburn, Tamara S. Haselkorn, Phineas T. Hamilton, Elizabeth Landzberg, John Jaenike & Steve J. Perlman
Facultative symbionts can represent important sources of adaptation for their insect hosts and thus have the potential for rapid spread. Drosophila neotestacea harbors a heritable symbiont, Spiroplasma, that confers protection against parasitic nematodes. We previously found a cline in Spiroplasma prevalence across central Canada, ending abruptly at the Rocky Mountains. Resampling these populations nine years later revealed that Spiroplasma had increased substantially across the region, resembling a Fisherian wave of advance. Associations between Spiroplasma infection...

Registration Year

  • 2013
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  • University of Rochester
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