Log in

Relevant bibliographies by topics / Genetic heterogeneity of environmental variation / Journal articles

To see the other types of publications on this topic, follow the link: Genetic heterogeneity of environmental variation.

Journal articles on the topic 'Genetic heterogeneity of environmental variation'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Genetic heterogeneity of environmental variation.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

HILL, WILLIAM G., and HAN A. MULDER. "Genetic analysis of environmental variation." Genetics Research 92, no. 5-6 (2010): 381–95. http://dx.doi.org/10.1017/s0016672310000546.

Full text

Abstract:

SummaryEnvironmental variation (VE) in a quantitative trait – variation in phenotype that cannot be explained by genetic variation or identifiable genetic differences – can be regarded as being under some degree of genetic control. Such variation may be either between repeated expressions of the same trait within individuals (e.g. for bilateral traits), in the phenotype of different individuals, where variation within families may differ, or in both components. We consider alternative models for defining the distribution of phenotypes to include a component due to heterogeneity ofVE. We review

APA, Harvard, Vancouver, ISO, and other styles

2

Zhang, Zhaoyang, Ning Du, Chunxia Pu, Zhijian Gu, and Zhekun Zhou. "Environmental heterogeneity decides bio-heterogeneity of the Spiraea japonica complex (Rosaceae) in China." Australian Journal of Botany 56, no. 1 (2008): 91. http://dx.doi.org/10.1071/bt07111.

Full text

Abstract:

Amplified fragment length polymorphism (AFLP) fingerprint was the measure used to reveal the patterns of genetic variation within the Spiraea japonica L. f. complex, in the context of physical environment differentiation stemming from the Himalaya–Tibet plateau uplift, the most significant geological event in eastern Asia since the late Paleocene. The complex displays obvious genetic heterogeneity among geographic populations, which was greater in south-western China than in eastern China. The uplift of the Himalaya–Tibet plateau, and consequent increase in environmental complexity in south-we

APA, Harvard, Vancouver, ISO, and other styles

3

Riddle, Russel A., Peter S. Dawson, and Dave F. Zirkle. "AN EXPERIMENTAL TEST OF THE RELATIONSHIP BETWEEN GENETIC VARIATION AND ENVIRONMENTAL VARIATION IN TRIBOLIUM FLOUR BEETLES." Genetics 113, no. 2 (1986): 391–404. http://dx.doi.org/10.1093/genetics/113.2.391.

Full text

Abstract:

ABSTRACT The hypothesis that a component of genetic variation for polygenic fitness traits is maintained by environmental heterogeneity was tested using an experimental system involving two species of flour beetles, Tribolium castaneum and T. confusum. Replicated populations of each species from a number of environmental treatments were analyzed for various fitness components following almost 60 generations of natural selection. Environmental differences consisted of flours of cereals commonly invaded by natural populations of these insects.—Tests for adaptation to environments were based on e

APA, Harvard, Vancouver, ISO, and other styles

4

Huang, Yuheng, Ivan Tran, and Aneil F. Agrawal. "Does Genetic Variation Maintained by Environmental Heterogeneity Facilitate Adaptation to Novel Selection?" American Naturalist 188, no. 1 (2016): 27–37. http://dx.doi.org/10.1086/686889.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Flatscher, Ruth, Božo Frajman, Peter Schönswetter, and Ovidiu Paun. "Environmental Heterogeneity and Phenotypic Divergence: Can Heritable Epigenetic Variation Aid Speciation?" Genetics Research International 2012 (March 4, 2012): 1–9. http://dx.doi.org/10.1155/2012/698421.

Full text

Abstract:

The dualism of genetic predisposition and environmental influences, their interactions, and respective roles in shaping the phenotype have been a hot topic in biological sciences for more than two centuries. Heritable epigenetic variation mediates between relatively slowly accumulating mutations in the DNA sequence and ephemeral adaptive responses to stress, thereby providing mechanisms for achieving stable, but potentially rapidly evolving phenotypic diversity as a response to environmental stimuli. This suggests that heritable epigenetic signals can play an important role in evolutionary pro

APA, Harvard, Vancouver, ISO, and other styles

6

Knowles, Peggy, and Michael C. Grant. "Genetic variation of lodgepole pine over time and microgeographical space." Canadian Journal of Botany 63, no. 4 (1985): 722–27. http://dx.doi.org/10.1139/b85-091.

Full text

Abstract:

The genetic composition of Pinus contorta var. latifolia as determined by isozyme analysis was examined in terms of its variation over space and time. Four populations of lodgepole pine consisting of approximately 125 trees each were sampled along an elevational gradient spanning a distance of 2 km in the Front Range of the Rocky Mountains in Colorado. Four isozymes were electrophoretically resolved from needle tissue removed from each tree. Ages were estimated from ring counts of either a tree core or a basal cross section of each tree. Gene frequencies were submitted to two-way analyses of v

APA, Harvard, Vancouver, ISO, and other styles

7

Rowe, S. J., I. M. S. White, S. Avendano, and W. G. Hill. "Genetic heterogeneity of residual variance within families for body weight in poultry." Proceedings of the British Society of Animal Science 2005 (2005): 8. http://dx.doi.org/10.1017/s1752756200009194.

Full text

Abstract:

In classical quantitative genetic models, phenotypic value depends on genotype, but phenotypic variation among individuals of the same genotype is assumed to be the same for all genotypes. ANOVA and other statistical tests are underpinned by the assumption of a multivariate normal distribution with homogenous variances and independent normally distributed deviations. Heterogeneity of phenotypic or environmental variance has been estimated in dairy cattle (Brotherstone and Hill, 1986). Models and analyses developed by SanChristobal et al. (1998) and Sorenson and Waagepeterson (2003) provide str

APA, Harvard, Vancouver, ISO, and other styles

8

Schmidt, Paul S., and Daphne R. Conde. "ENVIRONMENTAL HETEROGENEITY AND THE MAINTENANCE OF GENETIC VARIATION FOR REPRODUCTIVE DIAPAUSE IN DROSOPHILA MELANOGASTER." Evolution 60, no. 8 (2006): 1602. http://dx.doi.org/10.1554/05-430.1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Schmidt, Paul S., and Daphne R. Conde. "ENVIRONMENTAL HETEROGENEITY AND THE MAINTENANCE OF GENETIC VARIATION FOR REPRODUCTIVE DIAPAUSE IN DROSOPHILA MELANOGASTER." Evolution 60, no. 8 (2006): 1602–11. http://dx.doi.org/10.1111/j.0014-3820.2006.tb00505.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Fargeot, Laura, Géraldine Loot, Jérôme G. Prunier, Olivier Rey, Charlotte Veyssière, and Simon Blanchet. "Patterns of Epigenetic Diversity in Two Sympatric Fish Species: Genetic vs. Environmental Determinants." Genes 12, no. 1 (2021): 107. http://dx.doi.org/10.3390/genes12010107.

Full text

Abstract:

Epigenetic components are hypothesized to be sensitive to the environment, which should permit species to adapt to environmental changes. In wild populations, epigenetic variation should therefore be mainly driven by environmental variation. Here, we tested whether epigenetic variation (DNA methylation) observed in wild populations is related to their genetic background, and/or to the local environment. Focusing on two sympatric freshwater fish species (Gobio occitaniae and Phoxinus phoxinus), we tested the relationships between epigenetic differentiation, genetic differentiation (using micros

APA, Harvard, Vancouver, ISO, and other styles

11

Vijverberg, Susanne J. H., Niloufar Farzan, Elise M. A. Slob, Anne H. Neerincx, and Anke H. Maitland-van der Zee. "Treatment response heterogeneity in asthma: the role of genetic variation." Expert Review of Respiratory Medicine 12, no. 1 (2017): 55–65. http://dx.doi.org/10.1080/17476348.2018.1403318.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Mérot, Claire, Emma L. Berdan, Hugo Cayuela, et al. "Locally Adaptive Inversions Modulate Genetic Variation at Different Geographic Scales in a Seaweed Fly." Molecular Biology and Evolution 38, no. 9 (2021): 3953–71. http://dx.doi.org/10.1093/molbev/msab143.

Full text

Abstract:

Abstract Across a species range, multiple sources of environmental heterogeneity, at both small and large scales, create complex landscapes of selection, which may challenge adaptation, particularly when gene flow is high. One key to multidimensional adaptation may reside in the heterogeneity of recombination along the genome. Structural variants, like chromosomal inversions, reduce recombination, increasing linkage disequilibrium among loci at a potentially massive scale. In this study, we examined how chromosomal inversions shape genetic variation across a species range and ask how their con

APA, Harvard, Vancouver, ISO, and other styles

13

Qian, Y., and Ronald W. Davies. "Inter-population genetic variation in the freshwater leech Nephelopsis obscura in relation to environmental heterogeneity." Hydrobiologia 325, no. 2 (1996): 131–36. http://dx.doi.org/10.1007/bf00028273.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Lasalde, Clarivel, Roberto Rodriguez, Gary A. Toranzos, and Henry H. Smith. "Heterogeneity of uidA gene in environmental Escherichia coli populations." Journal of Water and Health 3, no. 3 (2005): 297–304. http://dx.doi.org/10.2166/wh.2005.041.

Full text

Abstract:

Previous studies have shown that Escherichia coli can be isolated from non-polluted rivers and from bromeliad axilae in pristine areas of tropical rain forests. Finding E. coli in pristine environments is unusual because this bacterium is thought to only survive in the gut of warm-blooded animals and thus its presence should indicate recent fecal contamination. The aims of this study were 1) to determine if E. coli is part of the native soil microbiota in tropical rain forests and 2) to determine if genetic heterogeneity exists among E. coli populations. High concentrations of total coliforms

APA, Harvard, Vancouver, ISO, and other styles

15

Verdonck, Margriet V. "Adaptation to environmental heterogeneity in populations of Drosophila melanogaster." Genetical Research 49, no. 1 (1987): 1–10. http://dx.doi.org/10.1017/s0016672300026665.

Full text

Abstract:

SummaryFor 29 generations, populations of Drosophila melanogaster were offered one favourable (standard) and one suboptimal (salt-supplemented) medium, either singly or simultaneously. Egg-to-adult viability, fecundity and choice of oviposition medium were measured at regular intervals on both resources up to 17 generations after initiation of the salt treatment. Except for a decrease in viability on salt medium in the single-resource populations (SRPs) maintained on the optimal medium, these fitness components remained unchanged. Estimation of a more inclusive measure of fitness, productivity

APA, Harvard, Vancouver, ISO, and other styles

16

Molenaar, Peter C. M., Dirk J. A. Smit, Dorret I. Boomsma, and John R. Nesselroade. "Estimation of Subject-Specific Heritabilities From Intra-Individual Variation: iFACE." Twin Research and Human Genetics 15, no. 3 (2012): 393–400. http://dx.doi.org/10.1017/thg.2012.9.

Full text

Abstract:

A new genetic factor model for multivariate phenotypic time series, iFACE, is presented which allows for the estimation of subject-specific model parameters of genetic and environmental factors. The iFACE was applied to multivariate EEG registrations obtained with single dizygotic twin pairs. The results showed evidence for considerable subject-specificity in heritabilities and environmental effects. The assumption that the population is homogeneous (i.e., that each case in the population obeys the same parametric model), does not hold for these psychophysiological data, and its use should be

APA, Harvard, Vancouver, ISO, and other styles

17

Brassard, Jonathan T., and Daniel J. Schoen. "Analysis of phenotypic selection among locations in Impatiens pallida and Impatiens capensis." Canadian Journal of Botany 68, no. 5 (1990): 1098–105. http://dx.doi.org/10.1139/b90-138.

Full text

Abstract:

Selection analysis of a set of quantitative traits was carried out in environmentally similar quadrats within natural populations of Impatiens capensis and Impatiens pallida to examine whether spatially heterogeneous directional selection is detectable when the range of environmental variation is restricted. While 25 of 96 different estimates of directional selection were significantly different from zero, there was only one instance in which directional selection of a quantitative trait was spatially heterogeneous among quadrats within species. The discovery of a low level of spatially hetero

APA, Harvard, Vancouver, ISO, and other styles

18

Ehsaninia, Jamshid, Navid Ghavi Hossein-Zadeh, and Abdol Ahad Shadparvar. "Estimation of genetic parameters for micro-environmental sensitivities of production traits in Holstein cows using two-step method." Animal Production Science 60, no. 6 (2020): 752. http://dx.doi.org/10.1071/an18687.

Full text

Abstract:

Context The request for more uniform animal products, which is motivated chiefly by economic reasons, has enhanced the interest in decreasing variability of characters via selection. In the present dairy operation, breeding dairy cows which have strong resistance against environmental changes for main traits is very important. Aims The aim of this study was to estimate genetic parameters for heterogeneity of residual variance in milk yield and composition of Iranian Holstein cows. Methods The dataset included 305-day production records of cows which were provided by the Animal Breeding Center

APA, Harvard, Vancouver, ISO, and other styles

19

Zumwalde, Bethany A., Ross A. McCauley, Ian J. Fullinwider, Drew Duckett, Emma Spence, and Sean Hoban. "Genetic, Morphological, and Environmental Differentiation of an Arid-Adapted Oak with a Disjunct Distribution." Forests 12, no. 4 (2021): 465. http://dx.doi.org/10.3390/f12040465.

Full text

Abstract:

The patterns of genetic and morphological diversity of a widespread species can be influenced by environmental heterogeneity and the degree of connectivity across its geographic distribution. Here, we studied Quercus havardii Rydb., a uniquely adapted desert oak endemic to the Southwest region of the United States, using genetic, morphometric, and environmental datasets over various geographic scales to quantify differentiation and understand forces influencing population divergence. First, we quantified variation by analyzing 10 eastern and 13 western populations from the disjunct distributio

APA, Harvard, Vancouver, ISO, and other styles

20

BENNETT, S. J., and N. W. GALWEY. "The use of spatial analysis to measure the effect of environmental heterogeneity on genetic variation in Trifolium species from Sardinia." Journal of Agricultural Science 139, no. 3 (2002): 283–94. http://dx.doi.org/10.1017/s0021859602002484.

Full text

Abstract:

Trifolium species are native to the Mediterranean Basin where they are an important component of permanent pastures. A number of species have become naturalized in Australia and are agriculturally important in annual pastures. To understand the importance of genetic and ecotypic variation in the adaptation of Trifolium species to a new environment, seeds of three predominantly inbreeding and two predominantly outcrossing species of Trifolium were collected from 12 sites in Sardinia in 1998. Detailed ecogeographic information was collected at each site. The progeny were grown at the University

APA, Harvard, Vancouver, ISO, and other styles

21

McDonald, Tegan Krista, and Sam Yeaman. "Effect of migration and environmental heterogeneity on the maintenance of quantitative genetic variation: a simulation study." Journal of Evolutionary Biology 31, no. 9 (2018): 1386–99. http://dx.doi.org/10.1111/jeb.13341.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Latimer, Andrew M., and Brooke S. Jacobs. "Quantifying how fine-grained environmental heterogeneity and genetic variation affect demography in an annual plant population." Oecologia 170, no. 3 (2012): 659–67. http://dx.doi.org/10.1007/s00442-012-2349-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Wolc, A., I. White, M. Lisowski, and W. G. Hill. "What contributes to differences in phenotypic variation between generations?" Proceedings of the British Society of Animal Science 2009 (April 2009): 200. http://dx.doi.org/10.1017/s1752756200030398.

Full text

Abstract:

Under the animal model genetic variance is estimated in the base population taking into account inbreeding and is otherwise assumed to remain unchanged over generations. In practice, phenotypic variation differs randomly or systematically over time. Intuitively, such changes would be attributed mostly to environmental effects, and so lower heritability would be expected when variation is inflated. Studies in dairy cattle show contradictory results (e.g. Boldman and Freeman, 1990). Laying hens are kept under environmental conditions intended to be constant, but show substantial heterogeneity in

APA, Harvard, Vancouver, ISO, and other styles

24

Yeaman, Sam, Yukon Chen, and Michael C. Whitlock. "NO EFFECT OF ENVIRONMENTAL HETEROGENEITY ON THE MAINTENANCE OF GENETIC VARIATION IN WING SHAPE IN DROSOPHILA MELANOGASTER." Evolution 64, no. 12 (2010): 3398–408. http://dx.doi.org/10.1111/j.1558-5646.2010.01075.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

White, Lauren A., Jonathon A. Siva-Jothy, Meggan E. Craft, and Pedro F. Vale. "Genotype and sex-based host variation in behaviour and susceptibility drives population disease dynamics." Proceedings of the Royal Society B: Biological Sciences 287, no. 1938 (2020): 20201653. http://dx.doi.org/10.1098/rspb.2020.1653.

Full text

Abstract:

Host heterogeneity in pathogen transmission is widespread and presents a major hurdle to predicting and minimizing disease outbreaks. Using Drosophila melanogaster infected with Drosophila C virus as a model system, we integrated experimental measurements of social aggregation, virus shedding, and disease-induced mortality from different genetic lines and sexes into a disease modelling framework. The experimentally measured host heterogeneity produced substantial differences in simulated disease outbreaks, providing evidence for genetic and sex-specific effects on disease dynamics at a populat

APA, Harvard, Vancouver, ISO, and other styles

26

Branch, Carrie L., Joshua P. Jahner, Dovid Y. Kozlovsky, Thomas L. Parchman, and Vladimir V. Pravosudov. "Absence of population structure across elevational gradients despite large phenotypic variation in mountain chickadees ( Poecile gambeli )." Royal Society Open Science 4, no. 3 (2017): 170057. http://dx.doi.org/10.1098/rsos.170057.

Full text

Abstract:

Montane habitats are characterized by predictably rapid heterogeneity along elevational gradients and are useful for investigating the consequences of environmental heterogeneity for local adaptation and population genetic structure. Food-caching mountain chickadees inhabit a continuous elevation gradient in the Sierra Nevada, and birds living at harsher, high elevations have better spatial memory ability and exhibit differences in male song structure and female mate preference compared to birds inhabiting milder, low elevations. While high elevation birds breed, on average, two weeks later th

APA, Harvard, Vancouver, ISO, and other styles

27

ORDAS, BERNARDO, ROSA A. MALVAR, and WILLIAM G. HILL. "Genetic variation and quantitative trait loci associated with developmental stability and the environmental correlation between traits in maize." Genetics Research 90, no. 5 (2008): 385–95. http://dx.doi.org/10.1017/s0016672308009762.

Full text

Abstract:

SummaryThere is limited experimental information about the genetic basis of micro-environmental variance (VE) (developmental stability) and environmental correlations. This study, by using a population of maize recombinant inbred lines (RIL) and simple sequence repeat (SSR) polymorphic markers, aims at the following: firstly, to quantify the genetic component of the VE or developmental stability for four traits in maize and the environmental correlation between these traits, and secondly, to identify quantitative trait loci (QTLs) that influence these quantities. We found that, when estimating

APA, Harvard, Vancouver, ISO, and other styles

28

Gomez-Mestre, Ivan, and Roger Jovani. "A heuristic model on the role of plasticity in adaptive evolution: plasticity increases adaptation, population viability and genetic variation." Proceedings of the Royal Society B: Biological Sciences 280, no. 1771 (2013): 20131869. http://dx.doi.org/10.1098/rspb.2013.1869.

Full text

Abstract:

An ongoing new synthesis in evolutionary theory is expanding our view of the sources of heritable variation beyond point mutations of fixed phenotypic effects to include environmentally sensitive changes in gene regulation. This expansion of the paradigm is necessary given ample evidence for a heritable ability to alter gene expression in response to environmental cues. In consequence, single genotypes are often capable of adaptively expressing different phenotypes in different environments, i.e. are adaptively plastic. We present an individual-based heuristic model to compare the adaptive dyn

APA, Harvard, Vancouver, ISO, and other styles

29

Lazzaro, Brian P., and Tom J. Little. "Immunity in a variable world." Philosophical Transactions of the Royal Society B: Biological Sciences 364, no. 1513 (2008): 15–26. http://dx.doi.org/10.1098/rstb.2008.0141.

Full text

Abstract:

Immune function is likely to be a critical determinant of an organism's fitness, yet most natural animal and plant populations exhibit tremendous genetic variation for immune traits. Accumulating evidence suggests that environmental heterogeneity may retard the long-term efficiency of natural selection and even maintain polymorphism, provided alternative host genotypes are favoured under different environmental conditions. ‘Environment’ in this context refers to abiotic factors such as ambient temperature or availability of nutrient resources, genetic diversity of pathogens or competing physio

APA, Harvard, Vancouver, ISO, and other styles

30

Morris, Matthew R. J., and Sean M. Rogers. "Overcoming maladaptive plasticity through plastic compensation." Current Zoology 59, no. 4 (2013): 526–36. http://dx.doi.org/10.1093/czoolo/59.4.526.

Full text

Abstract:

Abstract Most species evolve within fluctuating environments, and have developed adaptations to meet the challenges posed by environmental heterogeneity. One such adaptation is phenotypic plasticity, or the ability of a single genotype to produce multiple environmentally-induced phenotypes. Yet, not all plasticity is adaptive. Despite the renewed interest in adaptive phenotypic plasticity and its consequences for evolution, much less is known about maladaptive plasticity. However, maladaptive plasticity is likely an important driver of phenotypic similarity among populations living in differen

APA, Harvard, Vancouver, ISO, and other styles

31

Hasbún, Rodrigo, Jorge González, Carolina Iturra, Glenda Fuentes, Diego Alarcón, and Eduardo Ruiz. "Using Genome-Wide SNP Discovery and Genotyping to Reveal the Main Source of Population Differentiation inNothofagus dombeyi(Mirb.) Oerst. in Chile." International Journal of Genomics 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/3654093.

Full text

Abstract:

Within a woody plant species, environmental heterogeneity has the potential to influence the distribution of genetic variation among populations through several evolutionary processes. In some species, a relationship between environmental characteristics and the distribution of genotypes can be detected, showing the importance of natural selection as the main source of differentiation.Nothofagus dombeyi(Mirb.) Oerst. (Nothofagaceae) is an endemic tree species occurring both in Chile and in Argentina temperate forests. Postglacial history has been studied with chloroplast DNA and evolutionary f

APA, Harvard, Vancouver, ISO, and other styles

32

YANG, YE, OLE F. CHRISTENSEN, and DANIEL SORENSEN. "Analysis of a genetically structured variance heterogeneity model using the Box–Cox transformation." Genetics Research 93, no. 1 (2011): 33–46. http://dx.doi.org/10.1017/s0016672310000418.

Full text

Abstract:

SummaryOver recent years, statistical support for the presence of genetic factors operating at the level of the environmental variance has come from fitting a genetically structured heterogeneous variance model to field or experimental data in various species. Misleading results may arise due to skewness of the marginal distribution of the data. To investigate how the scale of measurement affects inferences, the genetically structured heterogeneous variance model is extended to accommodate the family of Box–Cox transformations. Litter size data in rabbits and pigs that had previously been anal

APA, Harvard, Vancouver, ISO, and other styles

33

Matesanz, Silvia, Marina Ramos-Muñoz, Mario Blanco-Sánchez, and Adrián Escudero. "High differentiation in functional traits but similar phenotypic plasticity in populations of a soil specialist along a climatic gradient." Annals of Botany 125, no. 6 (2020): 969–80. http://dx.doi.org/10.1093/aob/mcaa020.

Full text

Abstract:

Abstract Background and Aims Plants experiencing contrasting environmental conditions may accommodate such heterogeneity by expressing phenotypic plasticity, evolving local adaptation or a combination of both. We investigated patterns of genetic differentiation and plasticity in response to drought in populations of the gypsum specialist Lepidium subulatum. Methods We created an outdoor common garden with rain exclusion structures using 60 maternal progenies from four distinct populations that substantially differ in climatic conditions. We characterized fitness, life history and functional pl

APA, Harvard, Vancouver, ISO, and other styles

34

Weinig, Cynthia, Lisa A. Dorn, Nolan C. Kane, et al. "Heterogeneous Selection at Specific Loci in Natural Environments in Arabidopsis thaliana." Genetics 165, no. 1 (2003): 321–29. http://dx.doi.org/10.1093/genetics/165.1.321.

Full text

Abstract:

Abstract Genetic variation for quantitative traits is often greater than that expected to be maintained by mutation in the face of purifying natural selection. One possible explanation for this observed variation is the action of heterogeneous natural selection in the wild. Here we report that selection on quantitative trait loci (QTL) for fitness traits in the model plant species Arabidopsis thaliana differs among natural ecological settings and genetic backgrounds. At one QTL, the allele that enhanced the viability of fall-germinating seedlings in North Carolina reduced the fecundity of spri

APA, Harvard, Vancouver, ISO, and other styles

35

Pemberton, Josephine M. "Evolution of quantitative traits in the wild: mind the ecology." Philosophical Transactions of the Royal Society B: Biological Sciences 365, no. 1552 (2010): 2431–38. http://dx.doi.org/10.1098/rstb.2010.0108.

Full text

Abstract:

Recent advances in the quantitative genetics of traits in wild animal populations have created new interest in whether natural selection, and genetic response to it, can be detected within long-term ecological studies. However, such studies have re-emphasized the fact that ecological heterogeneity can confound our ability to infer selection on genetic variation and detect a population's response to selection by conventional quantitative genetics approaches. Here, I highlight three manifestations of this issue: counter gradient variation, environmentally induced covariance between traits and th

APA, Harvard, Vancouver, ISO, and other styles

36

Lowry, David B. "Landscape evolutionary genomics." Biology Letters 6, no. 4 (2010): 502–4. http://dx.doi.org/10.1098/rsbl.2009.0969.

Full text

Abstract:

Tremendous advances in genetic and genomic techniques have resulted in the capacity to identify genes involved in adaptive evolution across numerous biological systems. One of the next major steps in evolutionary biology will be to determine how landscape-level geographical and environmental features are involved in the distribution of this functional adaptive genetic variation. Here, I outline how an emerging synthesis of multiple disciplines has and will continue to facilitate a deeper understanding of the ways in which heterogeneity of the natural landscapes mould the genomes of organisms.

APA, Harvard, Vancouver, ISO, and other styles

37

Cohen-Woods, S., I. W. Craig, and P. McGuffin. "The current state of play on the molecular genetics of depression." Psychological Medicine 43, no. 4 (2012): 673–87. http://dx.doi.org/10.1017/s0033291712001286.

Full text

Abstract:

BackgroundIt has been well established that both genes and non-shared environment contribute substantially to the underlying aetiology of major depressive disorder (MDD). A comprehensive overview of genetic research in MDD is presented.MethodPapers were retrieved from PubMed up to December 2011, using many keywords including: depression, major depressive disorder, genetics, rare variants, gene–environment, whole genome, epigenetics, and specific candidate genes and variants. These were combined in a variety of permutations.ResultsLinkage studies have yielded some promising chromosomal regions

APA, Harvard, Vancouver, ISO, and other styles

38

LYMAN, RICHARD F., EVIATAR NEVO, and TRUDY F. C. MACKAY. "Variation in Drosophila sensory bristle number at ‘Evolution Canyon’." Genetical Research 80, no. 3 (2002): 215–23. http://dx.doi.org/10.1017/s0016672302005876.

Full text

Abstract:

‘Evolution Canyon’ on Mount Carmel, Israel, displays highly contrasting physical and biotic environments on a micro-geographic scale, and is a natural laboratory for investigating genetic responses to variable and extreme environments across species. Samples of Drosophila melanogaster and D. simulans were collected from three sites each on the north- and south-facing slopes of the canyon along altitudinal transects, and one site on the valley floor. Numbers of abdominal and sternopleural sensory bristles were recorded for each of these subpopulations in three thermal environments. In D. simula

APA, Harvard, Vancouver, ISO, and other styles

39

Singhal, Sonal, Huateng Huang, Pascal O. Title, Stephen C. Donnellan, Iris Holmes, and Daniel L. Rabosky. "Genetic diversity is largely unpredictable but scales with museum occurrences in a species-rich clade of Australian lizards." Proceedings of the Royal Society B: Biological Sciences 284, no. 1854 (2017): 20162588. http://dx.doi.org/10.1098/rspb.2016.2588.

Full text

Abstract:

Genetic diversity is a fundamental characteristic of species and is affected by many factors, including mutation rate, population size, life history and demography. To better understand the processes that influence levels of genetic diversity across taxa, we collected genome-wide restriction-associated DNA data from more than 500 individuals spanning 76 nominal species of Australian scincid lizards in the genus Ctenotus . To avoid potential biases associated with variation in taxonomic practice across the group, we used coalescent-based species delimitation to delineate 83 species-level lineag

APA, Harvard, Vancouver, ISO, and other styles

40

Xu, Liping, Yunhai Lu, Qian You, et al. "Biogeographical Variation and Population Genetic Structure ofSporisorium scitamineumin Mainland China: Insights from ISSR and SP-SRAP Markers." Scientific World Journal 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/296020.

Full text

Abstract:

A total of 100Sporisorium scitamineumisolates were investigated by inter simple sequence repeat (ISSR) and single primer-sequence related amplified polymorphism (SP-SRAP) markers. These isolates were clearly assorted into three distinct clusters regardless of method used: either cluster analysis or by principal component analysis (PCA) of the ISSR, SP-SRAP, or ISSR + SP-SRAP data set. The total gene diversity (Ht) and gene diversity between subpopulations (Hs) were estimated to be 0.34 to 0.38 and 0.22 to 0.29, respectively, by analyzing separately the ISSR and SP-SRAP data sets, and to be 0.2

APA, Harvard, Vancouver, ISO, and other styles

41

Bell, Rayna C., and Christian G. Irian. "Phenotypic and genetic divergence in reed frogs across a mosaic hybrid zone on São Tomé Island." Biological Journal of the Linnean Society 128, no. 3 (2019): 672–80. http://dx.doi.org/10.1093/biolinnean/blz131.

Full text

Abstract:

Abstract Although naturally heterogeneous environments can lead to mosaic hybrid zones, human-induced habitat fragmentation can also lead to environmental heterogeneity and hybridization. Here we quantify phenotypic and molecular divergence across a reed frog mosaic hybrid zone on São Tomé Island as a first step towards understanding the consequences of hybridization across this heterogeneous landscape. The São Tomé giant reed frog (Hyperolius thomensis) is strongly tied to cool, wet, forest habitats whereas the distribution of Moller’s reed frog (H. molleri) spans cool, wet, forests to warm,

APA, Harvard, Vancouver, ISO, and other styles

42

YANG, YE, CHRIS-CAROLIN SCHÖN, and DANIEL SORENSEN. "The genetics of environmental variation of dry matter grain yield in maize." Genetics Research 94, no. 3 (2012): 113–19. http://dx.doi.org/10.1017/s0016672312000304.

Full text

Abstract:

SummaryDry matter grain yield per plot from three genetically homogeneous single-cross maize hybrids were analysed to investigate whether environmental variance depends on genotype. Three genotypes were tested at 20 locations in 3 years. The data were analysed using a non-parametric approach and fully parametric Bayesian models. Both analyses reveal effects of genotype on environmental variation. The Bayesian analyses indicate that genotype by location–year interactions are the most important effects acting at the level of the mean. The best-fitting Bayesian model is one postulating genotype b

APA, Harvard, Vancouver, ISO, and other styles

43

Gysels, E. S., V. Leentjes, and F. A. M. Volckaert. "Small-scale clinal variation, genetic diversity and environmental heterogeneity in the marine gobies Pomatoschistus minutus and P. lozanoi (Gobiidae, Teleostei)." Heredity 93, no. 2 (2004): 208–14. http://dx.doi.org/10.1038/sj.hdy.6800496.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Beunen, Gaston, Martine Thomis, Maarten Peeters, Hermine H. Maes, Albrecht L. Claessens, and Robert Vlietinck. "Genetics of Strength and Power Characteristics in Children and Adolescents." Pediatric Exercise Science 15, no. 2 (2003): 128–38. http://dx.doi.org/10.1123/pes.15.2.128.

Full text

Abstract:

The aim of this study is to quantify the genetic and environmental variation in isometric and explosive strength (power) in children and adolescents, using structural equation models. Arm pull (static strength) and vertical jump (explosive strength, power) were measured in 105 twin pairs from the Leuven Longitudinal Twin Study. Boys and girls were tested at annual intervals between 10 and 16 years and at 18 years. Path models were fitted to the observed strength characteristics and a gender heterogeneity analysis was performed at each age level. A model including additive genetic and specific

APA, Harvard, Vancouver, ISO, and other styles

45

Zeisel, Steven H. "Precision (Personalized) Nutrition: Understanding Metabolic Heterogeneity." Annual Review of Food Science and Technology 11, no. 1 (2020): 71–92. http://dx.doi.org/10.1146/annurev-food-032519-051736.

Full text

Abstract:

People differ in their requirements for and responses to nutrients and bioactive molecules in the diet. Many inputs contribute to metabolic heterogeneity (including variations in genetics, epigenetics, microbiome, lifestyle, diet intake, and environmental exposure). Precision nutrition is not about developing unique prescriptions for individual people but rather about stratifying people into different subgroups of the population on the basis of biomarkers of the above-listed sources of metabolic variation and then using this stratification to better estimate the different subgroups’ dietary re

APA, Harvard, Vancouver, ISO, and other styles

46

Hull, Ryan M., and Jonathan Houseley. "The adaptive potential of circular DNA accumulation in ageing cells." Current Genetics 66, no. 5 (2020): 889–94. http://dx.doi.org/10.1007/s00294-020-01069-9.

Full text

Abstract:

Abstract Carefully maintained and precisely inherited chromosomal DNA provides long-term genetic stability, but eukaryotic cells facing environmental challenges can benefit from the accumulation of less stable DNA species. Circular DNA molecules lacking centromeres segregate randomly or asymmetrically during cell division, following non-Mendelian inheritance patterns that result in high copy number instability and massive heterogeneity across populations. Such circular DNA species, variously known as extrachromosomal circular DNA (eccDNA), microDNA, double minutes or extrachromosomal DNA (ecDN

APA, Harvard, Vancouver, ISO, and other styles

47

Read, Catherine Y. "Primer in Genetics and Genomics, Article 3–Explaining Human Diversity: The Role of DNA." Biological Research For Nursing 19, no. 3 (2017): 350–56. http://dx.doi.org/10.1177/1099800417698798.

Full text

Abstract:

Genetic variation lays the foundation for diversity and enables humans to adapt to changing environments. The order of the nucleotides adenine, guanine, cytosine, and thymine on the deoxyribonucleic acid (DNA) molecules of the nuclear chromosomes and mitochondrial DNA (mtDNA) plays an important role in normal cell division, tissue development, and reproduction but is susceptible to alteration from a large number of random, inherited, or environmental events. Variations can range from a change in a single nucleotide to duplication of entire chromosomes. Single nucleotide polymorphisms are the m

APA, Harvard, Vancouver, ISO, and other styles

48

Barker, J. S. F., P. D. East, and B. S. Weir. "TEMPORAL AND MICROGEOGRAPHIC VARIATION IN ALLOZYME FREQUENCIES IN A NATURAL POPULATION OF DROSOPHILA BUZZATII." Genetics 112, no. 3 (1986): 577–611. http://dx.doi.org/10.1093/genetics/112.3.577.

Full text

Abstract:

ABSTRACT Temporal variation in allozyme frequencies at six loci was studied by making monthly collections over 4 yr in one population of the cactophilic species Drosophila buzzatii. Ten sites were defined within the study locality, and for all temporal samples, separate collections were made at each of these sites. Population structure over microgeographic space and changes in population structure over time were analyzed using F-statistic estimators, and multivariate analyses of allele and genotype frequencies with environmental variables were carried out.—Allele frequencies showed significant

APA, Harvard, Vancouver, ISO, and other styles

49

Nneji, Lotanna M., Adeniyi C. Adeola, Fang Yan, et al. "Genetic variation and cryptic lineage diversity of the Nigerian red-headed rock agama Agama agama associate with eco-geographic zones." Current Zoology 65, no. 6 (2019): 713–24. http://dx.doi.org/10.1093/cz/zoz002.

Full text

Abstract:

AbstractNigeria is an Afrotropical region with considerable ecological heterogeneity and levels of biotic endemism. Among its vertebrate fauna, reptiles have broad distributions, thus, they constitute a compelling system for assessing the impact of ecological variation and geographic isolation on species diversification. The red-headed rock agama, Agama agama, lives in a wide range of habitats and, thus, it may show genetic structuring and diversification. Herein, we tested the hypothesis that ecology affects its genetic structure and population divergence. Bayesian inference phylogenetic anal

APA, Harvard, Vancouver, ISO, and other styles

50

Nowicka, Anna, Pranav Pankaj Sahu, Martin Kovacik, et al. "Endopolyploidy Variation in Wild Barley Seeds across Environmental Gradients in Israel." Genes 12, no. 5 (2021): 711. http://dx.doi.org/10.3390/genes12050711.

Full text

Abstract:

Wild barley is abundant, occupying large diversity of sites, ranging from the northern mesic Mediterranean meadows to the southern xeric deserts in Israel. This is also reflected in its wide phenotypic heterogeneity. We investigated the dynamics of DNA content changes in seed tissues in ten wild barley accessions that originated from an environmental gradient in Israel. The flow cytometric measurements were done from the time shortly after pollination up to the dry seeds. We show variation in mitotic cell cycle and endoreduplication dynamics in both diploid seed tissues (represented by seed ma

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!