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Items from 1 to 20 out of 129 results

article

Genome sequences and population genomics reveal climatic adaptation and genomic divergence between two closely related sweetgum species

Wu‐Qin Xu, Chao‐Qian Ren, Xin‐Yi Zhang, Hans‐Peter Comes, more

The Plant Journal > 118 > 5 > 1372 - 1387

Understanding the genetic basis of population divergence and adaptation is an important goal in population genetics and evolutionary biology. However, the relative roles of demographic history, gene flow, and/or selective regime in driving genomic divergence, climatic adaptation, and speciation in non‐model tree species are not yet fully understood. To address this issue, we generated whole‐genome...

article

Differential patterns in runs of homozygosity in two mice lines under divergent selection for environmental variability for birth weight

Candela Ojeda‐Marín, Juan Pablo Gutiérrez, Nora Formoso‐Rafferty, Félix Goyache, more

Journal of Animal Breeding and Genetics > 141 > 2 > 193 - 206

Runs of homozygosity (ROH) are defined as long continuous homozygous stretches in the genome which are assumed to originate from a common ancestor. It has been demonstrated that divergent selection for variability in mice is possible and that low variability in birth weight is associated with robustness. To analyse ROH patterns and ROH‐based genomic inbreeding, two mouse lines that were divergently...

article

Genomic data and common garden experiments reveal climate‐driven selection on ecophysiological traits in two Mediterranean oaks

José Alberto Ramírez‐Valiente, Aida Solé‐Medina, Juan José Robledo‐Arnuncio, Joaquín Ortego

Molecular Ecology > 32 > 5 > 983 - 999

Improving our knowledge of how past climate‐driven selection has acted on present‐day trait population divergence is essential to understand local adaptation processes and improve our predictions of evolutionary trajectories in the face of altered selection pressures resulting from climate change. In this study, we investigated signals of selection on traits related to drought tolerance and growth...

article

Quantifying adaptive divergence of the snowfinches in a common landscape

Huishang She, Zhiyong Jiang, Gang Song, Per G. P. Ericson, more

Diversity and Distributions > 28 > 12 > 2579 - 2592

Aim Species living in a shared environment face similar selective pressures and often evolve adaptive divergence to avoid competition. Quantifying phenotypic divergence and its genetic parallelism among sympatric species is important for understanding of ecologically moderated biodiversity. Here, we integrate ecologic, phenotypic and genomic datasets to study to what extent three sympatrically snowfinches...

article

Evolution of physical linkage between loci controlling ecological traits and mating preferences

Tarryn Schuldiner‐Harpaz, Richard M. Merrill, Chris D. Jiggins

Journal of Evolutionary Biology > 35 > 11 > 1537 - 1547

Coupling of multiple barriers to gene‐flow, such as divergent local adaptation and reproductive isolation, facilitates speciation. However, alleles at loci that contribute to barrier effects can be dissociated by recombination. Models of linkage between diverging alleles often consider elements that reduce recombination, such as chromosomal inversions and alleles that modify recombination rate between...

article

Sandy beach dwelling crickets (Orthoptera: Trigonidiidae) have no preference for substrates that match their body color

Riho Sato, Takashi Kuriwada

Entomological Science > 25 > 4 > n/a - n/a

Habitat choice is an important behavior for maximizing fitness. One of the factors involved in habitat choice is preference for habitat substrates. In the context of predatory avoidance, it is adaptive to prefer substrates that are matched to own body color. The ground cricket Dianemobius csikii (Bolívar, 1901) occurs on sandy beaches. The body color of D. csikii resembles the sand of their habitat,...

article

Evidence of climate‐driven selection on tree traits and trait plasticity across the climatic range of a riparian foundation species

Hillary F. Cooper, Rebecca J. Best, Lela V. Andrews, Jaclyn P. M. Corbin, more

Molecular Ecology > 31 > 19 > 5024 - 5040

Selection on quantitative traits by heterogeneous climatic conditions can lead to substantial trait variation across a species range. In the context of rapidly changing environments, however, it is equally important to understand selection on trait plasticity. To evaluate the role of selection in driving divergences in traits and their associated plasticities within a widespread species, we compared...

article

Adaptation to environmental temperature in divergent clades of the nematode Pristionchus pacificus

Mark Leaver, Eduardo Moreno, Merve Kayhan, Angela McGaughran, more

Evolution > 76 > 8 > 1660 - 1673

Because of ongoing climate change, populations of organisms are being subjected to stressful temperatures more often. This is especially problematic for ectothermic organisms, which are likely to be more sensitive to changes in temperature. Therefore, we need to know if ectotherms have adapted to environmental temperature and, if so, what are the evolutionary mechanisms behind such adaptation. Here,...

article

Sympatric genetic divergence between early‐ and late‐season weedy rice populations

Zhi Wang, Xingxing Cai, Xiao‐Qi Jiang, Qi‐Yu Xia, more

New Phytologist > 235 > 5 > 2066 - 2080

Sympatric genetic divergence is the most appealing and controversial pattern in the theory of ecological speciation. Examples that support sympatric genetic divergence in plant species are extremely rare. Solid evidence of sympatric genetic divergence will provide deep insights for revealing the underlying mechanisms of ecological speciation. We analysed the total genomic DNA sequences of 120...

article

Maintenance of local adaptation despite gene flow in a coastal songbird

Jonathan D. Clark, Phred M. Benham, Jesus E. Maldonado, David A. Luther, more

Evolution > 76 > 7 > 1481 - 1494

Adaptation to local environments is common in widespread species and the basis of ecological speciation. The song sparrow (Melospiza melodia) is a widespread, polytypic passerine that occurs in shrubland habitats throughout North America. We examined the population structure of two parapatric subspecies that inhabit different environments: the Atlantic song sparrow (M. m. atlantica), a coastal specialist,...

article

Impact of selection for birth weight variability on reproductive longevity: A mice model

Nora Formoso‐Rafferty, Juan Pablo Gutiérrez, Andrés García‐Álvarez, Teresa Pérez, more

Journal of Animal Breeding and Genetics > 139 > 4 > 370 - 379

Uniformity, understood as a similar performance in relevant livestock traits, such as birth weight within the litter, is being included as one of the selection objectives in breeding programmes, especially for polytocous livestock species. A divergent selection experiment for birth weight within‐litter variability in mice during 23 generations showed that homogeneous animals were better for litter...

article

Habitat‐linked genetic variation supports microgeographic adaptive divergence in an island‐endemic bird species

Rebecca G. Cheek, Brenna R. Forester, Patricia E. Salerno, Daryl R. Trumbo, more

Molecular Ecology > 31 > 10 > 2830 - 2846

We investigated the potential mechanisms driving habitat‐linked genetic divergence within a bird species endemic to a single 250‐km² island. The island scrub‐jay (Aphelocoma insularis) exhibits microgeographic divergence in bill morphology across pine–oak ecotones on Santa Cruz Island, California (USA), similar to adaptive differences described in mainland congeners over much larger geographic scales...

article

Parallel host‐plant‐associated differences in an extended phenotype between populations of six species of gall‐forming insects

Linyi Zhang, Briley F. Mullin, Shihan Shzu, Charles K. Davis, more

Ecological Entomology > 47 > 3 > 323 - 330

Understanding the role of divergent host‐use in promoting population differentiation among herbivorous insects provides valuable insight into the origin of diversity in this species‐rich group. A strong signature of divergent selection in promoting population differentiation is provided by parallel phenotypic divergence across multiple insect species adapting to the same set of divergent host plants...

article

Extensive pollinator sharing does not promote character displacement in two orchid congeners

Nina Joffard, Caroliné Olofsson, Magne Friberg, Nina Sletvold

Evolution > 76 > 4 > 749 - 764

Pollinator sharing between close relatives can be costly and can promote pollination niche partitioning and floral divergence. This should be reflected by a higher species divergence in sympatry than in allopatry. We tested this hypothesis in two orchid congeners with overlapping distributions and flowering times. We characterized floral traits and pollination niches and quantified pollen limitation...

article

Multidimensional divergent selection, local adaptation, and speciation

Nathan J. White, Roger K. Butlin

Evolution > 75 > 9 > 2167 - 2178

Divergent selection applied to one or more traits drives local adaptation and may lead to ecological speciation. Divergent selection on many traits might be termed “multidimensional” divergent selection. There is a commonly held view that multidimensional divergent selection is likely to promote local adaptation and speciation to a greater extent than unidimensional divergent selection. We disentangle...

article

Population genomics reveals repeated signals of adaptive divergence in the Atlantic salmon of north‐eastern Europe

Ksenia J. Zueva, Jaakko Lumme, Alexey E. Veselov, Craig R. Primmer, more

Journal of Evolutionary Biology > 34 > 6 > 866 - 878

Our ability to examine genetic variation across entire genomes has enabled many studies searching for the genetic basis of local adaptation. These studies have identified numerous loci as candidates for differential local selection; however, relatively few have examined the overlap among candidate loci identified from independent studies of the same species in different geographic areas or evolutionary...

article

Impact of rainfall seasonality on intraspecific trait variation in a shrub from a Mediterranean climate

Timothy E. Moore, Cynthia S. Jones, Caroline Chong, Carl D. Schlichting, more

Functional Ecology > 34 > 4 > 865 - 876

Selection pressures along climate gradients give rise to predictable variation in plant functional traits of individual species suggestive of local adaptation. Species whose ranges include winter rainfall, Mediterranean climates, or other strongly seasonal climates, may be exposed to divergent selection pressures at different ends of seasonality gradients. Here, we evaluate how rainfall seasonality...

article

A genomewide association study in divergently selected lines in rabbits reveals novel genomic regions associated with litter size traits

Bolívar Samuel Sosa‐Madrid, María Antonia Santacreu, Agustín Blasco, Luca Fontanesi, more

Journal of Animal Breeding and Genetics > 137 > 2 > 123 - 138

Uterine capacity (UC), defined as the total number of kits from unilaterally ovariectomized does at birth, has a high genetic correlation with litter size. The aim of our research was to identify genomic regions associated with litter size traits through a genomewide association study using rabbits from a divergent selection experiment for UC. A high‐density SNP array (200K) was used to genotype 181...

article

Genomic regions influencing intramuscular fat in divergently selected rabbit lines

Bolívar S. Sosa‐Madrid, Pilar Hernández, Agustín Blasco, Chris S. Haley, more

Animal Genetics > 51 > 1 > 58 - 69

Intramuscular fat (IMF) is one of the main meat quality traits for breeding programmes in livestock species. The main objective of this study was to identify genomic regions associated with IMF content comparing two rabbit populations divergently selected for this trait, and to generate a list of putative candidate genes. Animals were genotyped using the Affymetrix Axiom OrcunSNP Array (200k). After...

article

Latitudinal divergence in a widespread amphibian: Contrasting patterns of neutral and adaptive genomic variation

Patrik Rödin‐Mörch, Emilien Luquet, Yvonne Meyer‐Lucht, Alex Richter‐Boix, more

Molecular Ecology > 28 > 12 > 2996 - 3011

Stochastic effects from demographic processes and selection are expected to shape the distribution of genetic variation in spatially heterogeneous environments. As the amount of genetic variation is central for long‐term persistence of populations, understanding how these processes affect variation over large‐scale geographical gradients is pivotal. We investigated the distribution of neutral and...

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Genome sequences and population genomics reveal climatic adaptation and genomic divergence between two closely related sweetgum species

Differential patterns in runs of homozygosity in two mice lines under divergent selection for environmental variability for birth weight

Genomic data and common garden experiments reveal climate‐driven selection on ecophysiological traits in two Mediterranean oaks

Quantifying adaptive divergence of the snowfinches in a common landscape

Evolution of physical linkage between loci controlling ecological traits and mating preferences

Sandy beach dwelling crickets (Orthoptera: Trigonidiidae) have no preference for substrates that match their body color

Evidence of climate‐driven selection on tree traits and trait plasticity across the climatic range of a riparian foundation species

Adaptation to environmental temperature in divergent clades of the nematode Pristionchus pacificus

Sympatric genetic divergence between early‐ and late‐season weedy rice populations

Maintenance of local adaptation despite gene flow in a coastal songbird

Impact of selection for birth weight variability on reproductive longevity: A mice model

Habitat‐linked genetic variation supports microgeographic adaptive divergence in an island‐endemic bird species

Parallel host‐plant‐associated differences in an extended phenotype between populations of six species of gall‐forming insects

Extensive pollinator sharing does not promote character displacement in two orchid congeners

Multidimensional divergent selection, local adaptation, and speciation

Population genomics reveals repeated signals of adaptive divergence in the Atlantic salmon of north‐eastern Europe

Impact of rainfall seasonality on intraspecific trait variation in a shrub from a Mediterranean climate

A genomewide association study in divergently selected lines in rabbits reveals novel genomic regions associated with litter size traits

Genomic regions influencing intramuscular fat in divergently selected rabbit lines

Latitudinal divergence in a widespread amphibian: Contrasting patterns of neutral and adaptive genomic variation

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