Definition
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.
Introduction
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 (V P ) within a...
References
Byers, D. (2008). Components of phenotypic variance. Nature Education, 1(1), 161.
Falconer, D. S., & Mackay, T. F. C. (1981). Introduction to quantitative genetics. Longman London Google Scholar.
Fischer, K., Bot, A. N. M., Zwaan, B. J., & Brakefield, P. M. (2004). Genetic and environmental sources of egg size variation in the butterfly Bicyclus anynana. Heredity, 92(3), 163.
Lynch, M., & Walsh, B. (1998). Genetics and analysis of quantitative traits (Vol. 1, pp. 535–557). Sunderland: Sinauer.
Saastamoinen, M. (2008). Heritability of dispersal rate and other life history traits in the Glanville fritillary butterfly. Heredity, 100(1), 39.
Waldmann, P. (2001). Additive and non-additive genetic architecture of two different-sized populations of Scabiosa canescens. Heredity, 86(6), 648–657.
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Singh, V., Singh, K. (2018). Additive Genetic Variance. In: Vonk, J., Shackelford, T. (eds) Encyclopedia of Animal Cognition and Behavior. Springer, Cham. https://doi.org/10.1007/978-3-319-47829-6_5-1
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DOI: https://doi.org/10.1007/978-3-319-47829-6_5-1
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