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Detecting Genetic Interactions for Quantitative Traits Using m-Spacing Entropy Measure

Authors
Yee, JaeyongKwon, Min-SeokJin, SeohoonPark, TaesungPark, Mira
Issue Date
2015
Publisher
HINDAWI LTD
Citation
BIOMED RESEARCH INTERNATIONAL, v.2015
Indexed
SCIE
SCOPUS
Journal Title
BIOMED RESEARCH INTERNATIONAL
Volume
2015
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/133179
DOI
10.1155/2015/523641
ISSN
2314-6133
Abstract
A number of statistical methods for detecting gene-gene interactions have been developed in genetic association studies with binary traits. However, many phenotype measures are intrinsically quantitative and categorizing continuous traits may not always be straightforward and meaningful. Association of gene-gene interactions with an observed distribution of such phenotypes needs to be investigated directly without categorization. Information gain based on entropy measure has previously been successful in identifying genetic associations with binary traits. We extend the usefulness of this information gain by proposing a nonparametric evaluation method of conditional entropy of a quantitative phenotype associated with a given genotype. Hence, the information gain can be obtained for any phenotype distribution. Because any functional form, such as Gaussian, is not assumed for the entire distribution of a trait or a given genotype, this method is expected to be robust enough to be applied to any phenotypic association data. Here, we show its use to successfully identify the main effect, as well as the genetic interactions, associated with a quantitative trait.
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