World Library  
Flag as Inappropriate
Email this Article

Behavioural genetics

Article Id: WHEBN0024235330
Reproduction Date:

Title: Behavioural genetics  
Author: World Heritage Encyclopedia
Language: English
Subject: Sociobiology, Wim Crusio, Behavior Genetics Association, Hans van Abeelen, David Fulker
Collection: Behavioural Genetics, Behavioural Sciences, Genetics, Neuroscience
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Behavioural genetics

Behavioural genetics, also commonly referred to as behaviour genetics, is the field of study that examines the role of genetic and environmental influences on animal (including human) behaviour. Often associated with the "nature versus nurture" debate, behavioural genetics is highly interdisciplinary, involving contributions from biology, neuroscience, genetics, epigenetics, ethology, psychology, and statistics. Behavioural geneticists study the inheritance of behavioural traits. In humans, this information is often gathered through the use of the twin study or adoption study. In animal studies, breeding, transgenesis, and gene knockout techniques are common. Psychiatric genetics is a closely related field.

Contents

  • History 1
  • Methods 2
  • Notable behavioural geneticists 3
  • Journals 4
  • Societies 5
  • See also 6
  • References 7
  • Further reading 8
  • External links 9

History

Galton in his later years

Sir Francis Galton, a nineteenth-century intellectual, is recognized as one of the first behavioural geneticists. Galton, a cousin of Charles Darwin, studied the heritability of human ability, focusing on mental characteristics as well as eminence among close relatives in the English upper-class. In 1869, Galton published his results in Hereditary Genius.[1] In his work, Galton "introduced multivariate analysis and paved the way towards modern Bayesian statistics" that are used throughout the sciences—launching what has been dubbed the "Statistical Enlightenment".[2] Galton is often credited as the pioneer of eugenics.

In 1951, Calvin S. Hall in his seminal book chapter on behavioural genetics introduced the term "psychogenetics",[3] which enjoyed some limited popularity in the 1960s and 1970s.[4][5] However, it eventually disappeared from usage in favour of "behaviour genetics".

Behaviour genetics, per se, gained recognition as a research discipline with the publication in 1960 of the textbook Behavior Genetics by John L. Fuller and W.R. Thompson.[6] Nowadays, it is widely accepted that most behaviours in animals and humans are under some degree of genetic influence.[7]

Underscoring the role of evolution in behavioural genetics, Theodosius Dobzhansky was elected the first president of the Behavior Genetics Association in 1972; the BGA bestows the Dobzhansky Award on researchers for their outstanding contributions to the field. In the early 1970s, Lee Ehrman, a doctoral student of Dobzhansky, wrote seminal papers describing the relationship between genotype frequency and mating success in Drosophila,[8][9][10] lending impetus to the pursuit of genetic studies of behaviour in other animals. Studies on hygienic behaviour in honey bees were also carried out early in the history of the field.[11][12] The social behaviour of honey bees has also been studied and recent work has focussed on the gene involved in the foraging behaviour of Drosophila; this essentially allowed for deriving a relationship between gene expression and behaviour, where the gene regulating foraging behaviour in Drosophila also regulated social behaviour in bees.[13]

Methods

The primary goal of behavioural genetics is to establish causal relationships between genes and behaviour. Initial approaches to these questions often use behaviour genetic methods such as the twin study or adoption design (in humans). In animal research selection experiments have often been employed. For example, laboratory house mice have been bred for open-field behaviour,[14] thermoregulatory nesting,[15] and voluntary wheel-running behaviour.[16] A range of methods in these designs are covered on those pages.

If functional brain systems or neurotransmitter systems have been mapped to a behaviour, genes involved in theses systems can be examined for alleles linked to the behaviour. For instance an abnormal gene coding for glutamate could be a candidate gene for schizophrenia.

The Human Genome Project has allowed scientists to understand the coding sequence of human DNA nucleotides. This made readily possible many hundreds of research studies which are much less hypothesis-driven. In these association studies, researchers test the relationship of behaviour to polymorphisms across the genome, sometimes in hypothesis-driven pathway analyses. Pathways for most common traits are believed to be complex and involve many small genetic effects.. Initial attempts to associate particular genes (or at least chromosomal positions) to behaviour often involve a search for Quantitative trait loci (QTL).

Notable behavioural geneticists

Notable behavioural geneticists include Dorret Boomsma, Wim Crusio (the founding editor of the journal Genes, Brain and Behavior), John DeFries, Lindon Eaves, David Fulker, Irving Gottesman, John K. Hewitt, Jerry Hirsch, Kenneth Kendler, John C. Loehlin, Nick Martin, Gerald McClearn, Robert Plomin, Theodore Reich (a pioneer in psychiatric genetics), Hans van Abeelen, and Steven G. Vandenberg (the founding editor of the journal Behavior Genetics).

Journals

Behavioural geneticists are active in a variety of scientific disciplines including biology, medicine, pharmacology, psychiatry, and psychology; thus, behavioural-genetic research is published in a variety of scientific journals, including Nature and Science. Journals that specifically publish research in behavioural genetics include Behavior Genetics, Molecular Psychiatry, Psychiatric Genetics, Twin Research and Human Genetics, Genes, Brain and Behavior, and the Journal of Neurogenetics.

Societies

There exist several learned societies in the broader area of behavioural genetics:

See also

References

  1. ^
  2. ^
  3. ^
  4. ^
  5. ^
  6. ^
  7. ^
  8. ^
  9. ^
  10. ^
  11. ^
  12. ^
  13. ^
  14. ^
  15. ^
  16. ^

Further reading

External links

Free Massively Open Online Course on human behaviour genetics


This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.