7 Works

Data from: No effect of environmental heterogeneity on the maintenance of genetic variation in wing shape in Drosophila melanogaster

Sam Yeaman, Yukon Chen & Michael C. Whitlock
Theory suggests that heterogeneous environments should maintain more genetic variation within populations than homogeneous environments, yet experimental evidence for this effect in quantitative traits has been inconsistent. To examine the effect of heterogeneity on quantitative genetic variation, we maintained replicate populations of Drosophila melanogaster under treatments with constant temperatures, temporally variable temperature, or spatially variable temperature with either panmictic or limited migration. Despite observing differences in fitness and divergence in several wing traits between the...

Data from: Genetic approaches refine ex situ lowland tapir (Tapirus terrestris) conservation

Anders Gonçalves Da Silva, Danielle Lalonde, Viviana Quse, Alan Shoemaker & Michael Russello
Ex situ conservation management remains an important tool in the face of continued habitat loss and global environmental change. Here, we use microsatellite marker variation to evaluate conventional assumptions of pedigree-based ex situ population management and directly inform a captive lowland tapir breeding program within a range country. We found relatively high levels of genetic variation (Ntotal = 41; mean HE = 0.67 over 10 variable loci) and little evidence for relatedness among founder individuals...

Data from: Can clone size serve as a proxy for clone age? An exploration using microsatellite divergence in Populus tremuloides

Dilara Ally, Kermit Ritland & Sarah P. Otto
In long-lived clonal plant species, the overall size of a clone has previously been used to estimate clone age. The size of a clone, however, might be largely determined by physical or biotic interactions, obscuring the relationship between clone size and age. Here, we use the accumulation of mutations at 14 microsatellite loci to estimate clone age in trembling aspen, Populus tremuloides, from southwestern Canada. We show that the observed patterns of genetic divergence are...

Data from: SNP discovery in black cottonwood (Populus trichocarpa) by population transcriptome resequencing

Armando Geraldes, Johnson Pang, Nina Thiessen, Timothee Cezard, Richard Moore, Yongjun Zhao, Angela Tam, Shucai Wang, Michael Friedmann, Inanc Birol, Steven J M Jones, Quentin C B Cronk & Carl J Douglas
The western black cottonwood (Populus trichocarpa) was the first tree to have its genome fully sequenced and has emerged as the model species for the study of secondary growth and wood formation. It is also a good candidate species for the production of lignocellulosic biofuels. Here we present and make available to the research community the results of the sequencing of the transcriptome of developing xylem in 20 accessions with high throughput next generation sequencing...

Data from: Haploids adapt faster than diploids across a range of environments

Aleeza C Gerstein, Lesley A Cleathero, Mohammad A Mandegar & Sarah P. Otto
Despite a great deal of theoretical attention, we have limited empirical data about how ploidy influences the rate of adaptation. We evolved isogenic haploid and diploid populations of Saccharomyces cerevisiae for 200 generations in seven different environments. We measured the competitive fitness of all ancestral and evolved lines against a common competitor and find that in all seven environments haploid lines adapted faster than diploids, significantly so in three environments. We apply theory that relates...

Data from: The role of pleiotropy in the maintenance of sex in yeast

Jessica A. Hill & Sarah P. Otto
In facultatively sexual species, lineages that reproduce asexually for a period of time can accumulate mutations that reduce their ability to undergo sexual reproduction when sex is favorable. We propagated Saccharomyces cerevisiae asexually for ~800 generations, after which we measured the change in sexual fitness, measured as the proportion of asci observed in sporulation medium. The sporulation rate in cultures propagated asexually at small population size declined by 8%, on average, over this time period,...

Data from: Genetic evidence for high propagule pressure and long-distance dispersal in monk parakeet (Myiopsitta monachus) invasive populations

Anders Gonçalves Da Silva, Jessica Eberhard, Timothy Wright, Michael Avery & Michael Russello
The monk parakeet (Myiopsitta monachus) is a successful invasive species that does not exhibit life history traits typically associated with colonizing species (e.g., high reproductive rate or long-distance dispersal capacity). To investigate this apparent paradox, we examined individual and population genetic patterns of microsatellite loci at one native and two invasive sites. More specifically, we aimed to evaluate the role of propagule pressure, sexual monogamy, and long-distance dispersal in monk parakeet invasion success. Our results...

Registration Year

  • 2010

Resource Types

  • Dataset


  • University of British Columbia
  • New Mexico State University
  • United States Department of Agriculture
  • Louisiana State University