Encyclopedia of Animal Cognition and Behavior

Living Edition
| Editors: Jennifer Vonk, Todd Shackelford

Additive Genetic Variance

Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-47829-6_5-1


Additive variation is the total effect on a trait stemming from one or more gene loci. Each locus contributes to the trait in a measurable way.


Within a population, there are numerous potential sources of phenotypic variations. Each of these sources signifies a distinctive underlying origin. These sources of phenotypic variations decide whether that trait has an evolutionary potential and holds an ability to respond to natural/artificial selection or whether it can respond to environmental variations. A large number of investigators across the world are engaged in determining the significance of both the genetic and environmental factors in regulating the phenotypic expression of a particular trait. These types of information will help them in predicting the evolutionary dynamics of a whole population with reference to a particular trait (Waldmann 2001; Fisher et al. 2004; Byers 2008; Saastamoinen 2008).

Phenotypic Variance

Phenotypic variability (VP) within a...


Interaction Genetic Variances Genetic Diversity Bean Weight Individual Phenotypic Differences Epistatic Variance 
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Authors and Affiliations

  1. 1.Department of Molecular & Human GeneticsBanaras Hindu UniversityVaranasiIndia

Section editors and affiliations

  • Akash Gautam
    • 1
  1. 1.Centre for Neural and Cognitive Sciences, School of Medical SciencesUniversity of HyderabadHyderabadIndia