3,518 Works

Data from: Influence of climate change and post-delisting management on long-term population viability of the conservation-reliant Kirtland’s warbler

Donald Brown, Deahn Donner, Christine A. Ribic & Carol Bocetti
Rapid global climate change is resulting in novel abiotic and biotic conditions and interactions. Identifying management strategies that maximize probability of long-term persistence requires an understanding of the vulnerability of species to environmental changes. We sought to quantify the vulnerability of Kirtland’s Warbler (Setophaga kirtlandii), a rare Neotropical migratory songbird that breeds almost exclusively in the Lower Peninsula of Michigan and winters in the Bahamian Archipelago, to projected environmental changes on the breeding and wintering...

Data from: Out of sight, out of mind: Widespread nuclear and plastid-nuclear discordance in the flowering plant genus Polemonium (Polemoniaceae) suggests widespread historical gene flow despite limited nuclear signal

Jeffrey Rose, Cassio Toledo, Emily Lemmon, Alan Lemmon & Kenneth Sytsma
Phylogenomic data from a rapidly increasing number of studies provide new evidence for resolving relationships in recently radiated clades, but they also pose new challenges for inferring evolutionary histories. Most existing methods for reconstructing phylogenetic hypotheses rely solely on algorithms that only consider incomplete lineage sorting as a cause of intra- or inter-genomic discordance. Here, we utilize a variety of methods, including those to infer phylogenetic networks, to account for both incomplete lineage sorting and...

Natural variation for carotenoids in fresh kernels is controlled by uncommon variants in sweet corn

Matheus Baseggio, Matthew Murray, Maria Magallanes-Lundback, Nicholas Kaczmar, James Chamness, Edward Buckler, Margaret Smith, Dean DellaPenna, William Tracy & Michael Gore
Sweet corn (Zea mays L.) is highly consumed in the United States, but does not make major contributions to the daily intake of carotenoids (provitamin A carotenoids, lutein and zeaxanthin) that would help in the prevention of health complications. A genome-wide association study of seven kernel carotenoids and twelve derivative traits was conducted in a sweet corn inbred line association panel ranging from light to dark yellow in endosperm color to elucidate the genetic basis...

Subspecies variation of Daucus carota coastal (“gummifer”) morphotypes (Apiaceae) using genotyping-by-sequencing

Fernando Martínez-Flores, Manuel B. Crespo, Philipp W. Simon, Holly Ruess, Kathleen Reitsma, Emmanuel Geoffriau, Charlotte Allender, Najla Mezghani & David M. Spooner
The genus Daucus is widely distributed worldwide, but with a concentration of diversity in the Mediterranean Region. The D. carota complex presents the greatest taxonomic problems in the genus. We focus on a distinctive phenotypic group of coastal morphotypes of D. carota, strictly confined to the margins to within about 0.5 km of the Mediterranean Sea and the Atlantic Ocean, which we here refer to as coastal morphotypes or D. carota subsp. “gummifer” complex, the...

Giant island mice exhibit widespread gene expression changes in key metabolic organs

Mark Nolte, Peicheng Jing, Colin N Dewey & Bret A Payseur
Abstract Island populations repeatedly evolve extreme body sizes, but the genomic basis of this pattern remains largely unknown. To understand how organisms on islands evolve gigantism, we compared genome-wide patterns of gene expression in Gough Island mice, the largest wild house mice in the world, and mainland mice from the WSB/EiJ wild-derived inbred strain. We used RNASeq to quantify differential gene expression in three key metabolic organs: gonadal adipose depot, hypothalamus and liver. Between 4,000...

Data from: Broad geographic sampling reveals predictable, pervasive, and strong seasonal adaptation in Drosophila

Heather E. Machado, Alan O. Bergland, Ryan Taylor, Susanne Tilk, Emily Behrman, Kelly Dyer, Daniel K. Fabian, Thomas Flatt, Josefa González, Talia L. Karasov, Iryna Kozeretska, Brian P. Lazzaro, Thomas JS Merritt, John E. Pool, Katherine O’Brien, Subhash Rajpurohit, Paula R. Roy, Stephen W. Schaeffer, Svitlana Serga, Paul Schmidt, Dmitri Petrov & Bernard Kim
To advance our understanding of adaptation to temporally varying selection pressures, we identified signatures of seasonal adaptation occurring in parallel among Drosophila melanogaster populations. Specifically, we estimated allele frequencies genome-wide from flies sampled early and late in the growing season from 20 widely dispersed populations. We identified parallel seasonal allele frequency shifts across North America and Europe, demonstrating that seasonal adaptation is a general phenomenon of temperate fly populations. Seasonally fluctuating polymorphisms are enriched at...

Pollination ecology, specialization, and genetic isolation in sympatric bee pollinated Salvia (Lamiaceae)

Ferhat Celep, Zeynep Atalay, Fatih Dikmen, Musa Doğan, Kenneth J. Sytsma & Regine Claßen-Bockhoff
Premise of research. Previous pollination ecology studies in Salvia have shown that there is low specialization to certain subgroups of bees and that pollinator number varies with species and locality. We studied twelve Salvia species (three clades with different corolla morphologies and staminal lever mechanisms) which in part co-occur and co-flower to examine pre-zygotic isolation mechanisms and the degree of specialization vs. generalization in pollination ecology. Methodology. Pollinators were identified using field observations, photos, and...

Elevated rates of positive selection drive the evolution of pestiferousness in the Colorado potato beetle ( Leptinotarsa decemlineata, Say)

Zachary Cohen, Kristian Brevik, Yolanda H. Chen, David J. Hawthorne, Benjamin D. Weibel & Sean D. Schoville
In order to understand the evolution of pestiferousness, which we define as the accumulation of traits that contribute to an insect population’s success in an agroecosystem, we tested the importance of known genomic properties associated with rapid adaptation. Within the leaf beetle genus Leptinotarsa, only the Colorado potato beetle (CPB), Leptinotarsa decemlineata Say, and a few populations therein, has risen to pest status on cultivated nightshades, Solanum. Using whole genomes from ten closely related Leptinotarsa...

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