4 Works

Data from: Postzygotic isolation involves strong mitochondrial and sex-specific effects in Tigriopus californicus, a species lacking heteromorphic sex chromosomes

Brad R. Foley, Colin G. Rose, Daniel E. Rundle, Wai Leong & Suzanne Edmands
Detailed studies of the genetics of speciation have focused on a few model systems, particularly Drosophila. The copepod Tigriopus californicus offers an alternative that differs from standard animal models in that it lacks heteromorphic chromosomes (instead, sex determination is polygenic) and has reduced opportunities for sexual conflict, because females mate only once. Quantitative trait loci (QTL) mapping was conducted on reciprocal F2 hybrids between two strongly differentiated populations, using a saturated linkage map spanning all...

Data from: Disentangling the effects of geographic and ecological isolation on genetic differentiation

Gideon S. Bradburd, Peter L. Ralph & Graham M. Coop
Populations can be genetically isolated by both geographic distance and by differences in their ecology or environment that decrease the rate of successful migration. Empirical studies often seek to investigate the relationship between genetic differentiation and some ecological variable(s) while accounting for geographic distance, but common approaches to this problem (such as the partial Mantel test) have a number of drawbacks. In this article, we present a Bayesian method that enables users to quantify the...

Data from: Testing adaptive hypotheses of convergence with functional landscapes: a case study of bone-cracking hypercarnivores

Zhijie Jack Tseng
Morphological convergence is a well documented phenomenon in mammals, and adaptive explanations are commonly employed to infer similar functions for convergent characteristics. I present a study that adopts aspects of theoretical morphology and engineering optimization to test hypotheses about adaptive convergent evolution. Bone-cracking ecomorphologies in Carnivora were used as a case study. Previous research has shown that skull deepening and widening are major evolutionary patterns in convergent bone-cracking canids and hyaenids. A simple two-dimensional design...

Data from: Whole genome sequencing of two North American Drosophila melanogaster populations reveals genetic differentiation and positive selection

Daniel Campo, Kjong Lehmann, Courtney Fjeldsted, Tade Souaiaia, Joyce Kao & Sergey V. Nuzhdin
The prevailing demographic model for Drosophila melanogaster suggests that the colonization of North America occurred very recently from a subset of European flies that rapidly expanded across the continent. This model implies a sudden population growth and range expansion consistent with very low or no population subdivision. As flies adapt to new environments, local adaptation events may be expected. To describe demographic and selective events during North American colonization, we have generated a data set...

Registration Year

  • 2013
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  • Dataset
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Affiliations

  • University of Southern California
    4
  • University of California, Davis
    1