NDLI: Phenotypic Variability: Its Components, Measurement and Underlying Developmental Processes

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Phenotypic Variability: Its Components, Measurement and Underlying Developmental Processes

Content Provider	Springer Nature Link
Author	Willmore, Katherine Elizabeth Young, Nathan M. Richtsmeier, Joan T.
Copyright Year	2007
Abstract	Variability contrasts with variation in that variability describes the potential for variation, not simply the expressed variation. The power of studying variability lies in creating a conceptual framework around which the relationship between the genotype and phenotype can be understood. Here, we attempt to demonstrate the importance of phenotypic variability, how it structures variation, and how fundamental developmental processes structure variability. Given the broad scope of this topic, we focus on three widely studied properties of variability: canalization, developmental stability and morphological integration. We have organized the paper to emphasize the importance of differentiating between the theory surrounding these components of phenotypic variability, their measurement and the biological factors surrounding their expression. First, we define these properties of variability, how they relate to each other and to variability as a whole. Second, we summarize the common methods of measurement for canalization, developmental stability and morphological integration and the reasoning behind these methods. Finally, we focus on jaw development as an example of how the basic processes of development affect variability and the resultant variation, with emphasis on how processes at all levels of the organismal hierarchy interact with one another and contribute to phenotypic variability.
Starting Page	99
Ending Page	120
Page Count	22
File Format	PDF
ISSN	00713260
Journal	Evolutionary Biology
Volume Number	34
Issue Number	3-4
e-ISSN	19342845
Language	English
Publisher	Springer US
Publisher Date	2007-08-16
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Variability Variation Development Canalization Morphological integration Developmental stability Phenotype Animal Genetics and Genomics Human Genetics Developmental Biology Ecology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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