Standard Article

Quantitative Genetics

  1. Bruce Walsh

Published Online: 19 APR 2001

DOI: 10.1038/npg.els.0001785



How to Cite

Walsh, B. 2001. Quantitative Genetics. eLS. .

Author Information

  1. University of Arizona, Tucson, Arizona, USA

Publication History

  1. Published Online: 19 APR 2001


Almost any trait that can be defined shows variation, both within and between populations. Quantitative genetics is concerned with the analysis of the genetic and environmental basis of this variation. Classical genetics typically deals with single genes of large effect, while quantitative genetics often assumes a large number of genes, each with small effects, influence trait variation.


  • quantitative traits;
  • genetic variance;
  • additive genetics;
  • variance;
  • heritability;
  • quantitative trait loci (QTLs)