journal
https://read.qxmd.com/read/39036890/plasticity-for-the-win-flexible-transcriptional-response-to-host-plant-switches-in-the-comma-butterfly-polygonia-c-album
#1
JOURNAL ARTICLE
Katharina Schneider, Rachel A Steward, Maria de la Paz Celorio-Mancera, Niklas Janz, Dick Moberg, Christopher W Wheat, Sören Nylin
Generalist plant-feeding insects are characterised by a broad host repertoire that can comprise several families or even different orders of plants. The genetic and physiological mechanisms underlying the use of such a wide host range are still not fully understood. Earlier studies indicate that the consumption of different host plants is associated with host-specific gene expression profiles. It remained, however, unclear if and how larvae can alter these profiles in the case of a changing host environment...
July 22, 2024: Molecular Ecology
https://read.qxmd.com/read/39034770/runs-of-homozygosity-reveal-contrasting-histories-of-inbreeding-across-global-lineages-of-the-edible-porcini-mushroom-boletus-edulis
#2
JOURNAL ARTICLE
Etienne Brejon Lamartinière, Keaton Tremble, Bryn T M Dentinger, Kanchon K Dasmahapatra, Joseph I Hoffman
Inbreeding, the mating of individuals that are related through common ancestry, is of central importance in evolutionary and conservation biology due to its impacts on individual fitness and population dynamics. However, while advanced genomic approaches have revolutionised the study of inbreeding in animals, genomic studies of inbreeding are rare in plants and lacking in fungi. We investigated global patterns of inbreeding in the prized edible porcini mushroom Boletus edulis using 225 whole genomes from seven lineages distributed across the northern hemisphere...
July 22, 2024: Molecular Ecology
https://read.qxmd.com/read/39034651/population-dynamics-of-the-lyme-disease-bacterium-borrelia-burgdorferi-during-rapid-range-expansion-in-new-york-state
#3
JOURNAL ARTICLE
Zachary J Oppler, Melissa A Prusinski, Kayleigh R O'Keeffe, Patrick Pearson, Stephen M Rich, Richard C Falco, Vanessa Vinci, Collin O'Connor, Jamie Haight, P Bryon Backenson, Dustin Brisson
Recent changes in climate and human land-use have resulted in alterations of the geographic range of many species, including human pathogens. Geographic range expansion and population growth of human pathogens increase human disease risk. Relatively little empirical work has investigated the impact of range changes on within-population variability, a contributor to both colonization success and adaptive potential, during the precise time in which populations are colonized. This is likely due to the difficulties of collecting appropriate natural samples during the dynamic phase of migration and colonization...
July 21, 2024: Molecular Ecology
https://read.qxmd.com/read/39034607/expression-environment-associations-in-transcriptomic-heat-stress-responses-for-a-global-plant-lineage
#4
JOURNAL ARTICLE
Samuel C Andrew, Anna K Simonsen, Chris W Coppin, Pieter A Arnold, Verónica F Briceño, Todd G B McLay, Chris J Jackson, Rachael V Gallagher, Karel Mokany
The increasing frequency and severity of heatwaves will intensify stress on plants. Given regional variation in heatwave exposure and expected differences in thermal tolerance between species it is unlikely that all plant species will be affected equally by climate change. However, little is currently known about variation in the responses of plants to heat stress, or how those responses differ among closely related species adapted to different environments. Here we quantify the response of 17 Acacia species (175 RNA-seq libraries), from across Australia's diverse biomes, to a multi-day experimental heatwave treatment to identify variation in transcriptomic and physiological responses to heat stress...
July 21, 2024: Molecular Ecology
https://read.qxmd.com/read/39034599/sexy-fingers-pheromones-in-the-glands-of-male-dendrobatid-frogs
#5
JOURNAL ARTICLE
Diana Abondano Almeida, Evan Twomey, Fernando Vargas-Salinas, Carmen Meyer, Lisa M Schulte
Many animals exchange chemicals during courtship and mating. In some amphibians, sexual chemical communication is mediated by pheromones produced in male breeding glands that are transferred to the female's nostrils during mating. This has been mostly studied in salamanders, despite frogs having similar glands and courtship behaviours suggestive of chemical communication. In Neotropical poison frogs (Dendrobatidae and Aromobatidae), males of many species develop breeding glands in their fingers, causing certain fingers to visibly swell...
July 21, 2024: Molecular Ecology
https://read.qxmd.com/read/39032090/immune-gene-regulation-is-associated-with-age-and-environmental-adversity-in-a-nonhuman-primate
#6
JOURNAL ARTICLE
Marina M Watowich, Christina E Costa, Kenneth L Chiou, Elisabeth A Goldman, Rachel M Petersen, Sam Patterson, Melween I Martínez, Kirstin N Sterner, Julie E Horvath, Michael J Montague, Michael L Platt, Lauren J N Brent, James P Higham, Amanda J Lea, Noah Snyder-Mackler
Phenotypic aging is ubiquitous across mammalian species, suggesting shared underlying mechanisms of aging. Aging is linked to molecular changes to DNA methylation and gene expression, and environmental factors, such as severe external challenges or adversities, can moderate these age-related changes. Yet, it remains unclear whether environmental adversities affect gene regulation via the same molecular pathways as chronological, or 'primary', aging. Investigating molecular aging in naturalistic animal populations can fill this gap by providing insight into shared molecular mechanisms of aging and the effects of a greater diversity of environmental adversities - particularly those that can be challenging to study in humans or laboratory organisms...
July 20, 2024: Molecular Ecology
https://read.qxmd.com/read/39031116/accelerated-mitochondrial-evolution-and-asymmetric-fitness-of-hybrids-contribute-to-the-persistence-of-helix-thessalica-in-the-helix-pomatia-range
#7
JOURNAL ARTICLE
Ondřej Korábek, Bernhard Hausdorf
Interbreeding and introgression between recently diverged species is common. However, the processes that prevent these species from merging where they co-occur are not well understood. We studied the mechanisms that allowed an isolated group of populations of the snail Helix thessalica to persist within the range of the related Helix pomatia despite high gene flow. Using genomic cline analysis, we found that the nuclear gene flow between the two taxa across the mosaic hybrid zone was not different from that expected under neutral admixture, but that the exchange of mtDNA was asymmetric...
July 19, 2024: Molecular Ecology
https://read.qxmd.com/read/39022998/evolution-of-secondary-metabolites-morphological-structures-and-associated-gene-expression-patterns-in-galls-induced-by-four-closely-related-aphid-species-on-a-host-plant-species
#8
JOURNAL ARTICLE
Mayu Mizuki, Yohei Kaneko, Yoshitaka Yukie, Yoshihisa Suyama, Shun K Hirota, Shinichiro Sawa, Minoru Kubo, Akira Yamawo, Michiko Sasabe, Hiroshi Ikeda
Gall-forming insects induce various types of galls on their host plants by altering gene expression in host plant organs, and recent studies have been conducted for gene expression in galls. However, the evolutionary trajectories of gene expression patterns and the resulting phenotypes have not yet been studied using multiple related species. We investigated the speciation and the diversification process of galls induced by four closely related aphid species (Hormaphidini) on a host plant species (Hamamelis japonica) by examining the phylogenetic congruence between the geographical divergences of aphids and the host plant, and by comparing their gene expression patterns and resulting phenotypes...
July 18, 2024: Molecular Ecology
https://read.qxmd.com/read/39021304/a-female-biased-gene-expression-signature-of-dominance-in-cooperatively-breeding-meerkats
#9
JOURNAL ARTICLE
C Ryan Campbell, Marta Manser, Mari Shiratori, Kelly Williams, Luis Barreiro, Tim Clutton-Brock, Jenny Tung
Dominance is a primary determinant of social dynamics and resource access in social animals. Recent studies show that dominance is also reflected in the gene regulatory profiles of peripheral immune cells. However, the strength and direction of this relationship differs across the species and sex combinations investigated, potentially due to variation in the predictors and energetic consequences of dominance status. Here, we investigated the association between social status and gene expression in the blood of wild meerkats (Suricata suricatta; n = 113 individuals), including in response to lipopolysaccharide, Gardiquimod (an agonist of TLR7, which detects single-stranded RNA in vivo) and glucocorticoid stimulation...
July 17, 2024: Molecular Ecology
https://read.qxmd.com/read/39021282/forest-genomics-in-the-caucasus-through-the-lens-of-its-dominant-tree-species-fagus-orientalis
#10
JOURNAL ARTICLE
Thibaut Capblancq, Katarzyna Sękiewicz, Monika Dering
The last glacial period is known to have greatly influenced the demographic history of temperate forest trees, with important range contractions and post-glacial expansions that led to the formation of multiple genetic lineages and secondary contact zones in the Northern Hemisphere. These dynamics have been extensively studied for European and North American species but are still poorly understood in other temperate regions of rich biodiversity such as the Caucasus. Our study helps filling that gap by deciphering the genomic landscapes of F...
July 17, 2024: Molecular Ecology
https://read.qxmd.com/read/39016177/environmental-and-anthropogenic-factors-mediating-the-functional-connectivity-of-the-mesquite-lizard-along-the-eastern-trans-mexican-volcanic-belt
#11
JOURNAL ARTICLE
Óscar Romero-Báez, Melanie A Murphy, Aníbal H Díaz de la Vega-Pérez, Ella Vázquez-Domínguez
Functional connectivity, the extent to which a landscape facilitates or impedes the dispersal of individuals across the landscape, is a key factor for the survival of species. Anthropogenic activities, such as urbanization, agriculture and roads, negatively impact functional connectivity of most species, particularly low-vagility species like lizards. Here, we examine how a landscape modified by anthropogenic activities affects the functional connectivity, at both broad and fine scales, of a widely distributed generalist lizard Sceloporus grammicus in the eastern Trans-Mexican Volcanic Belt, Mexico...
July 17, 2024: Molecular Ecology
https://read.qxmd.com/read/39010794/longitudinal-gut-microbiome-dynamics-in-relation-to-age-and-senescence-in-a-wild-animal-population
#12
JOURNAL ARTICLE
Sarah F Worsley, Charli S Davies, Chuen Zhang Lee, Maria-Elena Mannarelli, Terry Burke, Jan Komdeur, Hannah L Dugdale, David S Richardson
In humans, gut microbiome (GM) differences are often correlated with, and sometimes causally implicated in, ageing. However, it is unclear how these findings translate in wild animal populations. Studies that investigate how GM dynamics change within individuals, and with declines in physiological condition, are needed to fully understand links between chronological age, senescence and the GM, but have rarely been done. Here, we use longitudinal data collected from a closed population of Seychelles warblers (Acrocephalus sechellensis) to investigate how bacterial GM alpha diversity, composition and stability are associated with host senescence...
July 16, 2024: Molecular Ecology
https://read.qxmd.com/read/39005142/domestication-and-evolutionary-histories-of-specialized-gut-symbionts-across-cephalotine-ants
#13
JOURNAL ARTICLE
Christian Cabuslay, John T Wertz, Benoît Béchade, Yi Hu, Sonali Braganza, Daniel Freeman, Shreyansh Pradhan, Maria Mukhanova, Scott Powell, Corrie Moreau, Jacob A Russell
The evolution of animals and their gut symbionts is a complex phenomenon, obscured by lability and diversity. In social organisms, transmission of symbionts among relatives may yield systems with more stable associations. Here, we study the history of a social insect symbiosis involving cephalotine ants and their extracellular gut bacteria, which come predominantly from host-specialized lineages. We perform multi-locus phylogenetics for symbionts from nine bacterial orders, and map prior amplicon sequence data to lineage-assigned symbiont genomes, studying distributions of rigorously defined symbionts across 20 host species...
July 15, 2024: Molecular Ecology
https://read.qxmd.com/read/38994921/historical-and-contemporary-processes-driving-the-origin-and-structure-of-an-admixed-population-within-a-contact-zone-between-subspecies-of-a-north-temperate-diadromous-fish
#14
JOURNAL ARTICLE
Amy Liu, Armando Geraldes, Eric B Taylor
Hybridization between divergent lineages can result in losses of distinct evolutionary taxa. Alternatively, hybridization can lead to increased genetic variability that may fuel local adaptation and the generation of novel traits and/or taxa. Here, we examined single-nucleotide polymorphisms generated using genotyping-by-sequencing in a population of Dolly Varden char (Pisces: Salmonidae) that is highly admixed within a contact zone between two subspecies (Salvelinus malma malma, Northern Dolly Varden [NDV] and S...
July 12, 2024: Molecular Ecology
https://read.qxmd.com/read/38994907/ontogenetic-variation-in-the-marine-foraging-of-atlantic-salmon-functionally-links-genomic-diversity-with-a-major-life-history-polymorphism
#15
JOURNAL ARTICLE
Tutku Aykanat, Jan Arge Jacobsen, Kjetil Hindar
The ecological role of heritable phenotypic variation in free-living populations remains largely unknown. Knowledge of the genetic basis of functional ecological processes can link genomic and phenotypic diversity, providing insight into polymorphism evolution and how populations respond to environmental changes. By quantifying the marine diet of Atlantic salmon, we assessed how foraging behaviour changes along the ontogeny, and in relation to genetic variation in two loci with major effects on age at maturity (six6 and vgll3)...
July 12, 2024: Molecular Ecology
https://read.qxmd.com/read/38994885/spatial-variation-in-genomic-signatures-of-local-adaptation-during-the-cane-toad-invasion-of-australia
#16
JOURNAL ARTICLE
Marc A Beer, Daryl R Trumbo, Rhett M Rautsaw, Christopher P Kozakiewicz, Brendan Epstein, Paul A Hohenlohe, Ross A Alford, Lin Schwarzkopf, Andrew Storfer
Adaptive evolution can facilitate species' range expansions across environmentally heterogeneous landscapes. However, serial founder effects can limit the efficacy of selection, and the evolution of increased dispersal during range expansions may result in gene flow swamping local adaptation. Here, we study how genetic drift, gene flow and selection interact during the cane toad's (Rhinella marina) invasion across the heterogeneous landscape of Australia. Following its introduction in 1935, the cane toad colonised eastern Australia and established several stable range edges...
July 12, 2024: Molecular Ecology
https://read.qxmd.com/read/38993027/isolation-by-environment-and-its-consequences-for-range-shifts-with-global-change-landscape-genomics-of-the-invasive-plant-common-tansy
#17
JOURNAL ARTICLE
Ryan Briscoe Runquist, David A Moeller
Invasive species are a growing global economic and ecological problem. However, it is not well understood how environmental factors mediate invasive range expansion. In this study, we investigated the recent and rapid range expansion of common tansy across environmental gradients in Minnesota, USA. We densely sampled individuals across the expanding range and performed reduced representation sequencing to generate a dataset of 3071 polymorphic loci for 176 individuals. We used non-spatial and spatially explicit analyses to determine the relative influences of geographic distance and environmental variation on patterns of genomic variation...
July 11, 2024: Molecular Ecology
https://read.qxmd.com/read/38993011/adult-telomere-length-is-positively-correlated-with-survival-and-lifetime-reproductive-success-in-a-wild-passerine
#18
JOURNAL ARTICLE
Heung Ying Janet Chik, Maria-Elena Mannarelli, Natalie Dos Remedios, Mirre J P Simons, Terry Burke, Julia Schroeder, Hannah L Dugdale
Explaining variation in individual fitness is a key goal in evolutionary biology. Recently, telomeres, repeating DNA sequences capping chromosome ends, have gained attention as a biomarker for body state, physiological costs, and senescence. Existing research has provided mixed evidence for whether telomere length correlates with fitness, including survival and reproductive output. Moreover, few studies have examined how the rate of change in telomere length correlates with fitness in wild populations. Here, we intensively monitored an insular population of house sparrows, and collected longitudinal telomere and life history data (16 years, 1225 individuals)...
July 11, 2024: Molecular Ecology
https://read.qxmd.com/read/38984778/combined-genome-and-transcriptome-provides-insight-into-the-genetic-evolution-of-an-edible-halophyte-suaeda-salsa-adaptation-to-high-salinity
#19
JOURNAL ARTICLE
Bing Cui, Ranran Liu, Qiong Yu, Jianrong Guo, Xihua Du, Zixin Chen, Chenyang Li, Tong Wang, Ru Liu, Rui He, Congcong Song, Yue Liu, Na Sui, Guifang Jia, Jie Song
Suaeda salsa L. is a typical halophyte with high value as a vegetable. Here, we report a 447.98 Mb, chromosomal-level genome of S. salsa, assembled into nine pseudomolecules (contig N50 = 1.36 Mb) and annotated with 27,927 annotated protein-coding genes. Most of the assembled S. salsa genome, 58.03%, consists of transposable elements. Some gene families including HKT1, NHX, SOS and CASP related to salt resistance were significantly amplified. We also observed expansion of genes encoding protein that bind the trace elements Zn, Fe, Cu and Mn, and genes related to flavonoid and α-linolenic acid metabolism...
July 10, 2024: Molecular Ecology
https://read.qxmd.com/read/38984705/the-biogeographic-and-evolutionary-processes-shaping-population-divergence-in-laupala
#20
JOURNAL ARTICLE
Thomas Blankers, Kerry L Shaw
Speciation generates biodiversity and the mechanisms involved are thought to vary across the tree of life and across environments. For example, well-studied adaptive radiations are thought to be fuelled by divergent ecological selection, but additionally are influenced heavily by biogeographic, genomic and demographic factors. Mechanisms of non-adaptive radiations, producing ecologically cryptic taxa, have been less well-studied but should likewise be influenced by these latter factors. Comparing among contexts can help pinpoint universal mechanisms and outcomes, especially if we integrate biogeographic, ecological and evolutionary processes...
July 10, 2024: Molecular Ecology
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