Genetic Variation and Natural Selection in Wild Populations of Fragaria Virginiana (Rosaceae) PDF Download
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Author: Diane S. Pavek
Publisher:
ISBN:
Category : Natural selection
Languages : en
Pages : 222
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Book Description
Author: Diane S. Pavek
Publisher:
ISBN:
Category : Natural selection
Languages : en
Pages : 222
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Book Description
Author: Timothy A. Mousseau
Publisher: Oxford University Press
ISBN: 0195344170
Category : Science
Languages : en
Pages : 276
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Book Description
Two of the great mysteries of biology yet to be explored concern the distribution and abundance of genetic variation in natural populations and the genetic architecture of complex traits. These are tied together by their relationship to natural selection and evolutionary history, and some of the keys to disclosing these secrets lie in the study of wild organisms in their natural environments. This book, featuring a superb selection of papers from leading authors, summarizes the state of current understanding about the extent of genetic variation within wild populations and the ways to monitor such variation. It proposes the idea that a fundamental objective of evolutionary ecology is necessary to predict organism, population, community, and ecosystem response to environmental change. In fact, the overall theme of the papers centers around the expression of genetic variation and how it is shaped by the action of natural selection in the natural environment. Patterns of adaptation in the past and the genetic basis of traits likely to be under selection in a dynamically changing environment is discussed along with a wide variety of techniques to test for genetic variation and its consequences, ranging from classical demography to the use of molecular markers. This book is perfect for professionals and graduate students in genetics, biology, ecology, conservation biology, and evolution.
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 896
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Author: P. F. Brussard
Publisher: Springer Science & Business Media
ISBN: 1461263301
Category : Science
Languages : en
Pages : 249
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Book Description
Traditionally, studies in ecological genetics have involved both field observations and laboratory genetic analyses. Comparisons and cor relations between these two kinds of data have provided valuable in formation on the genetic strategies behind the evolutionary adapta tions of species and their component local populations. Indeed, much of our current understanding of the dynamics of evolutionary pro cesses has come fro~ syntheses of ecological and genetic information. Since the recent discovery of abundant markers in the form of protein polymorphisms, scientific interest in the connections between genetics and ecology has quickened considerably. This volume contains the proceedings of the Society for the Study of Evolution's symposium, Genetics and Ecology: The Interface, held at Ithaca College, Ithaca, New York, June 12-15, 1977. This particular topic was selected because of a general feeling that a significant integration of genetics and ecology has developed in the last decade or so. Host ecologists no longer believe that each species has a characteristic and constant birth, death, and develonment rate, habitat preference, and so on, but that these para~eters vary a~ong populations and are at least partially under genetic control and sub ject to natural selection. Similarly, few population geneticists still view any species as infinitely large, panmictic, constant in numbers, and distributed evenly throughout its range.
Author: Daniel E. Meade
Publisher:
ISBN:
Category :
Languages : en
Pages : 490
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 860
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Author: Joseph James Murray
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 144
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Author:
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 502
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Author: Ellen Leffler
Publisher:
ISBN: 9781303423123
Category :
Languages : en
Pages : 225
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Book Description
Genetic variation within a population reflects a balance of evolutionary forces, with variation introduced by mutation or gene flow, eliminated by genetic drift or by positive/purifying selection and, potentially, maintained by balancing selection. In addition, the fates of variants are tied to those of nearby sites via linkage, to an extent determined by the recombination rate. Patterns of diversity throughout the genome thus hold a very rich, albeit convoluted and partial, record of evolutionary processes. It has become common to gather variation information across multiple individuals, increasingly genome-wide, providing the data with which to describe and test the influence of these various forces globally and at particular loci. In my dissertation, I use large-scale genetic variation data to address several evolutionary questions: First, I ask what are the important determinants of overall intraspecific genetic diversity levels by compiling and analyzing genetic diversity estimates from the literature for eukaryotic species. I find some intriguing patterns, but mainly highlight how much is still unresolved. Next, I use the genetic variation within two species, chimpanzees and humans, to look for evidence of loci under long-term balancing selection, a mode of selection for which conclusive signatures have been difficult to find and whose prevalence in nature is long debated. I find at least six loci with strong evidence that balancing selection has acted since before the species split, suggesting that long-term balancing selection may be more common than currently believed. Finally, using recombination events inferred from human pedigrees, I estimate the heritability of recombination phenotypes and conduct a genome-wide association study to identify genetic variation contributing to differences in recombination rates and patterns between individuals. These studies demonstrate how population patterns of genetic variation can provide insight into the action of selection and the genetic basis of recombination.
Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 478
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Book Description
