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https://www.readbyqxmd.com/read/28422135/genomic-evidence-of-hybridization-between-two-independent-invasions-of-european-green-crab-carcinus-maenas-in-the-northwest-atlantic
#1
N W Jeffery, C DiBacco, B F Wringe, R R E Stanley, L C Hamilton, P N Ravindran, I R Bradbury
Invasive species have been associated with significant negative impacts in their introduced range often outcompeting native species, yet the long-term evolutionary dynamics of biological invasions are not well understood. Hybridization, either among waves of invasion or between native and introduced populations, could alter the ecological and evolutionary impacts of invasions yet has rarely been studied in marine invasive species. The European green crab (Carcinus maenas) invaded eastern North America twice from northern and southern locations in its native range...
April 19, 2017: Heredity
https://www.readbyqxmd.com/read/28422134/genetic-structure-and-signatures-of-selection-in-grey-reef-sharks-carcharhinus-amblyrhynchos
#2
P Momigliano, R Harcourt, W D Robbins, V Jaiteh, G N Mahardika, A Sembiring, A Stow
With overfishing reducing the abundance of marine predators in multiple marine ecosystems, knowledge of genetic structure and local adaptation may provide valuable information to assist sustainable management. Despite recent technological advances, most studies on sharks have used small sets of neutral markers to describe their genetic structure. We used 5517 nuclear single-nucleotide polymorphisms (SNPs) and a mitochondrial DNA (mtDNA) gene to characterize patterns of genetic structure and detect signatures of selection in grey reef sharks (Carcharhinus amblyrhynchos)...
April 19, 2017: Heredity
https://www.readbyqxmd.com/read/28402328/the-phenotypic-correlates-and-quantitative-genetics-of-masculinization-in-the-rodent-octodon-degus
#3
D A Roff, M E Wolak, L A Correa, M Soto-Gamboa
In some mammals, female characteristics have been shown to depend, in part, on the intrauterine position during development of female fetuses relative to male fetuses. Females developing in close proximity to males show behavioral, physiological and life history characteristics that are masculinized. With the exception of one inconclusive study, nothing is known of the genetic basis of this phenomenon. In this paper, we reported an analysis of the quantitative genetic basis of masculinization, as indicated by the anogenital distance (AGD) at birth and weaning, in the rodent Octodon degus...
April 12, 2017: Heredity
https://www.readbyqxmd.com/read/28402327/conserved-g-matrices-of-morphological-and-life-history-traits-among-continental-and-island-blue-tit-populations
#4
B Delahaie, A Charmantier, S Chantepie, D Garant, M Porlier, C Teplitsky
The genetic variance-covariance matrix (G-matrix) summarizes the genetic architecture of multiple traits. It has a central role in the understanding of phenotypic divergence and the quantification of the evolutionary potential of populations. Laboratory experiments have shown that G-matrices can vary rapidly under divergent selective pressures. However, because of the demanding nature of G-matrix estimation and comparison in wild populations, the extent of its spatial variability remains largely unknown. In this study, we investigate spatial variation in G-matrices for morphological and life-history traits using long-term data sets from one continental and three island populations of blue tit (Cyanistes caeruleus) that have experienced contrasting population history and selective environment...
April 12, 2017: Heredity
https://www.readbyqxmd.com/read/28379211/population-structure-and-historical-demography-of-dipteronia-dyeriana-sapindaceae-an-extremely-narrow-palaeoendemic-plant-from-china-implications-for-conservation-in-a-biodiversity-hot-spot
#5
C Chen, R S Lu, S S Zhu, I Tamaki, Y X Qiu
Inferring past demography is a central question in evolutionary and conservation biology. It is, however, sometimes challenging to disentangle their roles of contemporary versus historical processes in shaping the current patterns of genetic variation in endangered species. In this study, we used both chloroplast microsatellite (cpSSR) loci and nuclear microsatellite (nSSR) loci to assess the levels of genetic differentiation, genetic effective population size, contemporary/historical levels of gene flow and demographic history for five populations sampled across the range of Dipteronia dyeriana, an endangered palaeoendemism from Southwestern China...
April 5, 2017: Heredity
https://www.readbyqxmd.com/read/28353686/genetic-structure-and-invasion-history-of-the-house-mouse-mus-musculus-domesticus-in-senegal-west-africa-a-legacy-of-colonial-and-contemporary-times
#6
C Lippens, A Estoup, M K Hima, A Loiseau, C Tatard, A Dalecky, K Bâ, M Kane, M Diallo, A Sow, Y Niang, S Piry, K Berthier, R Leblois, J-M Duplantier, C Brouat
Knowledge of the genetic make-up and demographic history of invasive populations is critical to understand invasion mechanisms. Commensal rodents are ideal models to study whether complex invasion histories are typical of introductions involving human activities. The house mouse Mus musculus domesticus is a major invasive synanthropic rodent originating from South-West Asia. It has been largely studied in Europe and on several remote islands, but the genetic structure and invasion history of this taxon have been little investigated in several continental areas, including West Africa...
March 29, 2017: Heredity
https://www.readbyqxmd.com/read/28353685/strong-population-structure-in-a-species-manipulated-by-humans-since-the-neolithic-the-european-fallow-deer-dama-dama-dama
#7
K H Baker, H W I Gray, V Ramovs, D Mertzanidou, Ç Akın Pekşen, C C Bilgin, N Sykes, A R Hoelzel
Species that have been translocated and otherwise manipulated by humans may show patterns of population structure that reflect those interactions. At the same time, natural processes shape populations, including behavioural characteristics like dispersal potential and breeding system. In Europe, a key factor is the geography and history of climate change through the Pleistocene. During glacial maxima throughout that period, species in Europe with temperate distributions were forced south, becoming distributed among the isolated peninsulas represented by Anatolia, Italy and Iberia...
March 29, 2017: Heredity
https://www.readbyqxmd.com/read/28327581/the-early-life-environment-of-a-pig-shapes-the-phenotypes-of-its-social-partners-in-adulthood
#8
L Canario, N Lundeheim, P Bijma
Social interactions among individuals are abundant, both in natural and domestic populations, and may affect phenotypes of individuals. Recent research has demonstrated that the social effect of an individual on the phenotype of its social partners may have a genetic component, known as an indirect genetic effect (IGE). Little is known, however, of nongenetic factors underlying such social effects. Early-life environments often have large effects on phenotypes of the individuals themselves later in life. Offspring development in many mammalian species, for example, depends on interactions with the mother and siblings...
March 22, 2017: Heredity
https://www.readbyqxmd.com/read/28327580/circular-mating-as-an-option-for-the-genetic-management-of-captive-populations-response-to-caballero-et-al
#9
K Theodorou, D Couvet
No abstract text is available yet for this article.
March 22, 2017: Heredity
https://www.readbyqxmd.com/read/28327579/the-risk-of-forcing-inbreeding-in-conservation-programmes-a-reply-to-theodorou-and-couvet
#10
A Caballero, I Bravo, J Wang
No abstract text is available yet for this article.
March 22, 2017: Heredity
https://www.readbyqxmd.com/read/28327578/partial-support-for-the-central-marginal-hypothesis-within-a-population-reduced-genetic-diversity-but-not-increased-differentiation-at-the-range-edge-of-an-island-endemic-bird
#11
K M Langin, T S Sillett, W C Funk, S A Morrison, C K Ghalambor
Large-scale population comparisons have contributed to our understanding of the evolution of geographic range limits and species boundaries, as well as the conservation value of populations at range margins. The central-marginal hypothesis (CMH) predicts a decline in genetic diversity and an increase in genetic differentiation toward the periphery of species' ranges due to spatial variation in genetic drift and gene flow. Empirical studies on a diverse array of taxa have demonstrated support for the CMH. However, nearly all such studies come from widely distributed species, and have not considered if the same processes can be scaled down to single populations...
March 22, 2017: Heredity
https://www.readbyqxmd.com/read/28295035/contrasting-patterns-of-population-structure-and-gene-flow-facilitate-exploration-of-connectivity-in-two-widely-distributed-temperate-octocorals
#12
L P Holland, T L Jenkins, J R Stevens
Connectivity is an important component of metapopulation dynamics in marine systems and can influence population persistence, migration rates and conservation decisions associated with Marine Protected Areas (MPAs). In this study, we compared the genetic diversity, gene flow and population structure of two octocoral species, Eunicella verrucosa and Alcyonium digitatum, in the northeast Atlantic (ranging from the northwest of Ireland and the southern North Sea, to southern Portugal), using two panels of 13 and 8 microsatellite loci, respectively...
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28295034/fine-scale-genetic-structure-due-to-adaptive-divergence-among-microhabitats
#13
D N Wagner, T Z Baris, D I Dayan, X Du, M F Oleksiak, D L Crawford
It has been suggested that adaptive evolution on ecological timescales shapes communities. However, adaptation among environments relies on isolation or large selection coefficients that exceed migration effects. This reliance is tempered if adaptation is polygenic-does not depend on one allele completely replacing another but instead requires small allele frequency changes at many loci. Thus, whether individuals can evolve adaptation to fine-scale habitat variation (for example, microhabitats) is not resolved...
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28295033/myosin-xi-is-associated-with-fitness-and-adaptation-to-aridity-in-wild-pearl-millet
#14
I S Ousseini, Y Bakasso, N A Kane, M Couderc, L Zekraoui, C Mariac, D Manicacci, B Rhoné, A Barnaud, C Berthouly-Salazar, A Assoumane, D Moussa, T Moussa, Y Vigouroux
Phenotypic changes in plants can be observed along many environmental gradients and are determined by both environmental and genetic factors. The identification of alleles associated with phenotypic variations is a rapidly developing area of research. We studied the genetic basis of phenotypic variations in 11 populations of wild pearl millet (Pennisetum glaucum) on two North-South aridity gradients, one in Niger and one in Mali. Most of the 11 phenotypic traits assessed in a common garden experiment varied between the populations studied...
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28295032/air-borne-genotype-by-genotype-indirect-genetic-effects-are-substantial-in-the-filamentous-fungus-aspergillus-nidulans
#15
N O Rode, P Soroye, R Kassen, H D Rundle
Genotype by genotype indirect genetic effects (G × G IGEs) occur when the phenotype of an individual is influenced by an interaction between its own genotype and those of neighbour individuals. Little is known regarding the relative importance of G × G IGEs compared with other forms of direct and indirect genetic effects. We quantified the relative importance of IGEs in the filamentous fungus Aspergillus nidulans, a species in which IGEs are likely to be important as air-borne social interactions are known to affect growth...
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28295031/x-linkage-is-not-a-general-inhibitor-of-tissue-specific-gene-expression-in-drosophila-melanogaster
#16
E Argyridou, A K Huylmans, A Königer, J Parsch
As a consequence of its difference in copy number between males and females, the X chromosome is subject to unique evolutionary forces and gene regulatory mechanisms. Previous studies of Drosophila melanogaster have shown that the expression of X-linked, testis-specific reporter genes is suppressed in the male germline. However, it is not known whether this phenomenon is restricted to testis-expressed genes or if it is a more general property of genes with tissue-specific expression, which are also underrepresented on the X chromosome...
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28295030/plarmeb-integration-of-least-angle-regression-with-empirical-bayes-for-multilocus-genome-wide-association-studies
#17
J Zhang, J-Y Feng, Y-L Ni, Y-J Wen, Y Niu, C L Tamba, C Yue, Q Song, Y-M Zhang
Multilocus genome-wide association studies (GWAS) have become the state-of-the-art procedure to identify quantitative trait nucleotides (QTNs) associated with complex traits. However, implementation of multilocus model in GWAS is still difficult. In this study, we integrated least angle regression with empirical Bayes to perform multilocus GWAS under polygenic background control. We used an algorithm of model transformation that whitened the covariance matrix of the polygenic matrix K and environmental noise...
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28295029/is-homoploid-hybrid-speciation-that-rare-an-empiricist-s-view
#18
G Nieto Feliner, I Álvarez, J Fuertes-Aguilar, M Heuertz, I Marques, F Moharrek, R Piñeiro, R Riina, J A Rosselló, P S Soltis, I Villa-Machío
No abstract text is available yet for this article.
March 15, 2017: Heredity
https://www.readbyqxmd.com/read/28198816/low-genetic-diversity-and-strong-population-structure-shaped-by-anthropogenic-habitat-fragmentation-in-a-critically-endangered-primate-trachypithecus-leucocephalus
#19
W Wang, Y Qiao, S Li, W Pan, M Yao
Habitat fragmentation may strongly impact population genetic structure and reduce the genetic diversity and viability of small and isolated populations. The white-headed langur (Trachypithecus leucocephalus) is a critically endangered primate species living in a highly fragmented and human-modified habitat in southern China. We examined the population genetic structure and genetic diversity of the species and investigated the environmental and anthropogenic factors that may have shaped its population structure...
February 15, 2017: Heredity
https://www.readbyqxmd.com/read/28198815/enhancing-genomic-prediction-with-genome-wide-association-studies-in-multiparental-maize-populations
#20
Y Bian, J B Holland
Genome-wide association mapping using dense marker sets has identified some nucleotide variants affecting complex traits that have been validated with fine-mapping and functional analysis. However, many sequence variants associated with complex traits in maize have small effects and low repeatability. In contrast to genome-wide association study (GWAS), genomic prediction (GP) is typically based on models incorporating information from all available markers, rather than modeling effects of individual loci. We considered methods to integrate results of GWASs into GP models in the context of multiple interconnected families...
February 15, 2017: Heredity
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