7 Works

Data from: Combining and Comparing Morphometric Shape Descriptors with a Molecular Phylogeny: The Case of Fruit Type Evolution in Bornean Lithocarpus (Fagaceae)

Charles H. Cannon & Paul S. Manos
Fruit type in the genus Lithocarpus (Fagaceae) includes both classic oak acorns and novel modifications. Bornean taxa with modified fruits can be separated into two sections (Synaedrys and Lithocarpus) based on subtle shape differences. Following strict criteria for homology and representation, this variation in shape can be captured and the sections distinguished using elliptic Fourier or eigenshape analysis. Phenograms of fruit shape, constructed using restricted maximum likelihood techniques and these morphometric descriptors, were incorporated into...

Data from: Life-history QTLs and natural selection on flowering time in Boechera stricta, a perennial relative of Arabidopsis

Jill Theresa Anderson, Cheng-Ruei Lee & Thomas Mitchell-Olds
Plants must precisely time flowering to capitalize on favorable conditions. Although we know a great deal about the genetic basis of flowering phenology in model species under controlled conditions, the genetic architecture of this ecologically-important trait is poorly understood in non-model organisms. Here, we evaluated the transition from vegetative growth to flowering in Boechera stricta, a perennial relative of Arabidopsis thaliana. We examined flowering time QTLs using 7,920 recombinant inbred individuals, across seven lab and...

Data from: Genetic and evolutionary correlates of fine-scale recombination rate variation in Drosophila persimilis

Laurie S. Stevison & Mohamed A. F. Noor
Recombination is fundamental to meiosis in many species and generates variation on which natural selection can act, yet fine-scale linkage maps are cumbersome to construct. We generated a fine-scale map of recombination rates across two major chromosomes in Drosophila persimilis using 181 SNP markers spanning two of five major chromosome arms. Using this map, we report significant fine-scale heterogeneity of local recombination rates. However, we also observed “recombinational neighborhoods,” where adjacent intervals had similar recombination...

Data from: Climatic stability and genetic divergence in the tropical insular lizard Anolis krugi, the Puerto Rican \"Lagartijo Jardinero de la Montaña\"

Javier Rodríguez, Tereza Jezkova & Manuel Leal
Two factors that can lead to geographic structuring in conspecific populations are barriers to dispersal and climatic stability. Populations that occur in different physiographic regions may be restricted to those areas by physical and/or ecological barriers, which may facilitate the formation of phylogeographic clades. Long-term climatic stability can also promote genetic diversification, because new clades are likely to evolve in areas that experience lesser climatic shifts. We conducted a phylogeographic study of the Puerto Rican...

Data from: Is local adaptation in Mimulus guttatus caused by trade-offs at individual loci?

Megan Hall, David Lowry & John Willis
Local adaptation is considered to be the result of fitness trade-offs for particular phenotypes across different habitats. However, it is unclear whether such phenotypic trade-offs exist at the level of individual genetic loci. Local adaptation could arise from trade-offs of alternative alleles at individual loci or by complementary sets of loci with different fitness effects of alleles in one habitat but selective neutrality in the alternative habitat. To evaluate the genome-wide basis of local adaptation,...

Data from: Two-phase increase in the maximum size of life over 3.5 billion years reflects biological innovation and environmental opportunity

Jonathan L. Payne, Alison G. Boyer, James H. Brown, Seth Finnegan, Michal Kowaleski, , S. Kathleen Lyons, Craig R. McClain, Daniel W. McShea, Phillip M. Novack-Gottshall, Felisa A. Smith, Jennifer A. Stempien, Steve C. Wang, D. W. McShea, M. Kowalewski, J. L. Payne, R. A. Krause, S. C. Wang, P. M. Novack-Gottshall, A. G. Boyer, J. H. Brown & F. A. Smith
NOTE: See also http://bodysize.nescent.org. ABSTRACT: The maximum size of organisms has increased enormously since the initial appearance of life >3.5 billion years ago (Gya), but the pattern and timing of this size increase is poorly known. Consequently, controls underlying the size spectrum of the global biota have been difficult to evaluate. Our period-level compilation of the largest known fossil organisms demonstrates that maximum size increased by 16 orders of magnitude since life first appeared in...

Data from: Genetics of incipient speciation in Drosophila mojavensis. III. Life history divergence in allopatry and reproductive isolation

William J. Etges, Cássia Cardoso De Oliveira, Mohamed A. F. Noor & Michael G. Ritchie
We carried out a three-tiered genetic analysis of egg-to-adult development time and viability in ancestral and derived populations of cactophilic D. mojavensis to test the hypothesis that evolution of these life history characters has shaped premating reproductive isolation in this species. First, a common garden experiment with 11 populations from Baja California and mainland Mexico and Arizona reared on two host cacti revealed significant host plant X region and population interactions for viability and development...

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