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Topic: Quantitative genetics

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	Quantitative genetics - Wikipedia, the free encyclopedia
		Quantitative genetics is the study of continuous traits (such as height or weight) and its underlying mechanisms.
		Quantitative genetics is not limited to continuous traits, but to all traits that are determined by many genes.
		Quantitative Genetics Resources by Michael Lynch and Bruce Walsh, including the two volumes of their textbook, Genetics and Analysis of Quantitative Traits and Evolution and Selection of Quantitative Traits.
	en.wikipedia.org /wiki/Quantitative_genetics (715 words)

	Quantitative Genetics
		A major task of quantitative genetics is to determine the ways in which genes interact with the environment to contribute to the formation of a given quantitative trait distribution.
		The estimated ratio of genetic to environmental variation is not a measure of the relative contribution of genes and environment to phenotype.
		Estimates of genetic and environmental variance are specific to the single population and the particular set of environments in which the estimates are made.
	www.ncbi.nlm.nih.gov /books/bv.fcgi?rid=iga.chapter.3974 (154 words)

	Mackay Homepage
		This continuous variation is attributable to segregating genetic variation at multiple loci and environmental sensitivity of allelic effects at loci contributing to the trait phenotype.
		Further, the nature of genetic variation for quantitative traits is expected to differ depending on the relationship of the trait to fitness.
		We are using linkage disequilibrium, or association, between nucleotide and insertion/deletion polymorphisms at candidate genes with quantitative phenotypes in random breeding populations to assess the contribution of candidate genes to phenotypic variation, and to identify the causal QTN.
	www.cals.ncsu.edu /genetics/mackay/mackay.html (2229 words)

	QUANTITATIVE GENETICS (Site not responding. Last check: 2007-10-12)
		Quantitative genetics of signal evolution: A comparison of the pheromonal signal in two populations of the cabbage looper, Trichoplusia ni.
		On the limits of quantitative genetics for the study of phenotypic evolution.
		The population and evolutionary genetics of codon bias.
	www.eeb.uconn.edu /Courses/EEB449/449_quant_genet_refs.htm (1133 words)

	Quantitative Genetics
		With the development of recombinant DNA technology and the molecular genetic tools which have followed, the specific chromosomal location of many more genes is known, linkage to specific markers has been established, and many genes of clinical importance have been cloned and sequenced.
		Genetic mapping has made use the concepts of polymorphism and non-random assortment of genes due to linkage.
		To arrive at the final goal of identification of mutant genes that result in genetic disease requires that mutant DNA be separated out of the rest of the genome of the individual.
	info.med.yale.edu /genetics/clinical/quant.htm (1453 words)

	Quantitative inheritance
		However, we are often interested in the genetics of a population of individuals and in the case of plant breeding, in achieving selection responses in populations of individuals.
		Population Genetics is the study of genetic variation in natural populations and the factors leading to genetic changes in time and space.
		Quantitative genetics: Many of the traits of economic importance that are of interest to geneticists and plant breeders do not show the discrete patterns of inheritance required for Mendelian analysis.
	cropandsoil.oregonstate.edu /classes/css43003/notes10.htm (4219 words)

	Population and Quantitative Genetics (Site not responding. Last check: 2007-10-12)
		Quantitative Inheritance is the genetics of plant and animal breeders.
		Quantitative traits are more continuous, a scale with individuals ranging from one extreme to the other.
		When genetic variation is high and the environmental variation is small, then offspring tend to resemble their parents to a high degree.
	www.biology.ewu.edu /aHerr/Genetics/Bio310/Pages/POPQUAN/popquan.html (2245 words)

	Nearctica - Evolution - Population Genetics
		This is volume 2 of a two volume work on quantitative genetics and deals with population genetics.
		The lectures begin with an introduction to the basics of population genetics and move on to random genetic drift, selection, population structure, and quantitative genetics, to name but a few of the topics.
		There is a general, simple introduction to population genetics as well as some games to be played and descriptions of some of the applications of population genetics in real life.
	www.nearctica.com /evolve/popgen.htm (366 words)

	2007 GRC on Quantitative Genetics And Genomics
		Quantitative genetics aims to link phenotypic variation to its underlying genetic basis in order to better understand and predict genetic composition and long term change within natural, agricultural, and human populations.
		Traditionally built upon statistical abstractions of genetic effects, the field is now rapidly advancing by making use of recent developments in genetic technology to reveal explicit links between genes and complex phenotypes, and therefore serves as a focal point bringing together many emerging areas of genetics, genomics, statistics, and biotechnology.
		The strength of the Gordon Conference on "Quantitative Genetics and Genomics" has historically been the bringing together of leaders in each of these fields to explore areas of shared interest and cutting edge developments with the potential to affect all researchers within the broad field of quantitative genetics.
	www.grc.org /programs/2007/quantgen.htm (347 words)

	Neuroscience Meets Quantitative Genetics: Using Morphometric Data to Map Genes that Modulate CNS Architecture (Site not responding. Last check: 2007-10-12)
		Quantitative methods now pervade most aspects of neuroanatomical research, whether the focus is on dendritic spines or the topography of human neocortex.
		Quantitative trait loci are normal genes in every sense of the word, but they are referred to using this somewhat unwieldy term to highlight the fact that variant forms—or alleles—of QTLs have relatively subtle quantitative effects on phenotypes (Lynch and Walsh, 1998).
		Since all genetic maps are measured in units of recombination, not in basepairs, this process greatly increases the length of the genetic map.
	www.nervenet.org /papers/shortcourse98.html (13693 words)

	Quantitative Genetics
		Quantitative genetics deals with the genetics of continuously varying characters.
		Rather than considering changes in the frequencies of specific alleles of genotypes, quantitative genetics seeks to "quantify" changes in the frequency distribution of traits that cannot easily be placed in discrete phenotypic classes.
		This correlation between parent and offspring can serve as a simple means of quantifying the heritability of the trait: if there is a 1:1 correlation of phenotype between parents and offspring (e.g., a 45 degree slope of the regression of offspring phenotype vs. parent phenotype) then the trait has the maximal heritability.
	biomed.brown.edu /Courses/BIO48/10.Quan.genetics.HTML (1195 words)

	Genetics - Wikipedia, the free encyclopedia
		The word "genetics" was first suggested to describe the study of inheritance and the science of variation by the prominent British scientist William Bateson in a personal letter to Adam Sedgwick, dated April 18, 1905.
		The foundational discipline is population genetics which studies the distribution of and change in allele frequencies of genes under the influence of the four evolutionary forces: natural selection, genetic drift, mutation and migration.
		Traits that are under the influence of a large number of genes are known as quantitative traits, and their mapping to a location on the chromosome requires accurate phenotypic, pedigree and marker data from a large number of related individuals.
	en.wikipedia.org /wiki/Genetics (1837 words)

	Gene Expression: Quantitative Genetics
		Most of these phenotypes are "quantitative traits." There seems to be a common conflation in the minds of many about how these traits work, and an attempt to apply the simpler mendelian genetics that applies to discrete traits (a small number of expressions of the trait, for instance, blue, green or brown eyes, etc.).
		Of course, Mendelian genetics is the bedrock from which quantitative traits, or continuous traits (height, IQ, etc.), emerge, but one must use different methods to analyze these traits because they are polygenic (multiple genes influence their expression) & often environmentally sensitive (the environment has a strong influence on their expression).
		The normal distribution, regression to the mean and narrow-sense heritability are all terms associated with quantitative traits [1] (though note that since many of these terms, for instance, the first two, come out of the world of statistics, they are often found outside of genetics).
	www.gnxp.com /MT2/archives/000793.html (367 words)

	Genetics Courses
		Heredity; genetics for students not specializing in life sciences; principles of heredity; current advances in genetics applied to humans, animals and plants with their impact on life sciences and society.
		P: Genetics 466 or Bact 370 or equiv, and Biochem 501 or equiv, or cons inst.
		Quantitative Genetics: (Estimating number of loci involved in a phenotype; Predicting offspring from parental phenotypes; Meanings of heritability in broad and narrow sense)
	www.genetics.wisc.edu /courses/courses.html (1350 words)

	Amazon.com: Genetics and Analysis of Quantitative Traits: Books: Michael Lynch,Bruce Walsh (Site not responding. Last check: 2007-10-12)
		Quantitative genetics does this, they state, and they define it as a mechanistic theory of the evolutionary process.
		What is also interesting about quantitative genetics is that it was responsible directly or indirectly for a large body of statistical theory, many of these results being standard material in modern classes in statistics.
		The arithmetic involved in genetic mapping is treated in fair detail, the authors overviewing what is involved mathematically in map distances, recombination frequencies, and in the estimation of how many randomly distributed markers are needed to gaurantee that a portion of the genome is within a given number of map units of a marker.
	amazon.com /Genetics-Analysis-Quantitative-Traits-Michael/dp/0878934812 (1735 words)

	Evolutionary Quantitative Genetics
		But his characterization is largely beside the point: Quantitative genetics is a diverse body of theory that attempts to predict the relationship of morphologic evolution (both variation and change over time) and underlying population genetic parameters.
		This is a topic important not just within quantitative genetics, but in all evolutionary disciplines: One of the basic axioms of phylogenetic reconstruction, for example, is that shared traits are inherited from a common ancestor.
		Readers who are completely new to quantitative genetics may be surprised to find that the heritability of a trait is not all or nothing: Some traits are more heritable than others and virtually none are 100% or 0% heritable.
	www.nhm.ac.uk /hosted_sites/pe/1998_2/books/book2.htm (1500 words)

	Quantitative genetics research (Site not responding. Last check: 2007-10-12)
		Quantitative traits are among the most conspicuous features of organisms, features that we immediately recognize.
		The study of quantitative traits and their genetic basis is fundamental to our understanding of evolutionary biology, as well as to applied genetics such as animal and plant breeding.
		Recent empirical advances in quantitative genetics have shown that there is a distribution of locus effects for quantitative traits: some loci (called Quantitative Trait Loci, or QTL) explain a large proportion of the genotypic contribution to trait variance, while others have minor but detectable effects on phenotype.
	www.georgetown.edu /faculty/miller/QTL.html (409 words)

	HUGEN 2033 : Quantitative Genetics
		Quantitative aspects of the genetic epidemiology of human diseases.
		The objective of this class is to introduce students to advanced topics in genetic epidemiology, specifically related to the analysis of quantitative data.
		After finishing this course, the student should be well prepared to undertake all aspects of an analysis of quantitative data, including study design, data cleaning and preparation, phenotype definition and/or modeling, estimation of heritability, linkage analysis, and fine-mapping.
	www.hgen.pitt.edu /academics/show_course?id=2 (436 words)

	BIO 304. Ecology & Evolution: Genetics (Site not responding. Last check: 2007-10-12)
		Quantitative genes have additive, equal and small effect on the phenotype.
		Fact: the average genetic relatedness between siblings is 0.5, between any parent and offspring is 0.5, between dizygotic twins is 0.5, and between monozygotic twins is 1.0.
		After understanding the basic genetical principles, go to Population Genetics to learn how new alleles appear or disappear in populations, and how the genetic makeup of populations may change over time.
	www.micro.utexas.edu /courses/levin/bio304/genetics/genetics.html (344 words)

	Quantitative Genetics
		To estimate heritabilities, genetic correlations, juvenile-mature correlations, and genotype X environment interactions for both seedling and rooted cutting populations in chile.
		The objectives for this study are to rank parents and produce breeding values for increment core specific gravity for the Florida loblolly first generation population with particular emphasis on parents with a breeding value for volume greater than zero.
		Information about the genetic merit of individuals in the Florida loblolly population for increment core specific gravity could be used for deployment, roguing of orchards, breeding to increase specific gravity, or breeding for volume gain while holding specific gravity fixed.
	www.sfrc.ufl.edu /CFGRP/Quantgenetics.htm (1321 words)

	GTS353 Advanced population and quantitative genetics (Site not responding. Last check: 2007-10-12)
		Population genetics is one of the keys to unlock the wealth of information trapped silently in molecular data.
		Population genetics is thus the field that allows us to interpret molecular data and to predict what may happen in the future given certain scenarios.
		Population genetics unifies processes such as migration, selection, mutation and reproductive strategies with genetic diversity as seen at a molecular level.
	www.up.ac.za /academic/genetics/academic/GTS353.htm (255 words)

	2005 GRC on Quantitative Genetics And Genomics
		Traditionally built upon statistical abstractions of genetic effects, the field is now poised to make use of recent advances in genetic technology to reveal explicit links between genes and complex phenotypes, and therefore serves as a focal point bringing together many emerging areas of genetics, genomics, statistics, and biotechnology.
		In planning the 2005 Gordon Conference on "Quantitative Genetics and Genomics" we looked to expanding areas of science that are founded in both classical quantitative genetics and evolution, and that are advancing quickly due to the gain in information provided by genomics and proteomics.
		Transcript profiling (e.g., microarray technology) is currently supporting the exploration of "genetic architecture" (e.g., expression QTL mapping) and in turn has created a great deal of excitement and interest across a variety of organisms.
	www.grc.uri.edu /programs/2005/quantgen.htm (786 words)

	Quantitative Neurogenetics and QTL Mapping (Site not responding. Last check: 2007-10-12)
		The challenge for cancer genetics is therefore to move forward from the Mendelian genetics of the rare familial cancer syndromes into the field of quantitative trait loci, susceptibility factors, and modifier genes.
		QTL analysis and genome-wide mutagenesis in mice: Complementary genetic approaches to the dissection of complex traits.
		Quantitative electron microscopy was used to count neurons in retinas of over 450 animals.
	www.nervenet.org /main/papers01.html (1675 words)

	Faculty Research Page (Site not responding. Last check: 2007-10-12)
		The Genetics Department is especially strong in the areas of quantitative and population genetics and molecular and developmental genetics.
		Quantitative genetics of growth and reproductive traits in mice
		Corn genetics and breeding, isozyme genetics of maize, and numerical taxonomy
	www.cals.ncsu.edu /genetics/faculty.html (281 words)

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