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• W2109754847 abstract "Developmental bias, or genetic channeling, can influence the tempo and direction of evolution and, thus, become reflected in patterns of biodiversity. Twenty years ago, this notion rested on armchair descriptions of potential constraints on evolution. Now, a broad evo-devo approach involving both evolutionary and developmental genetics provides experimental analysis of such bias, revealing how shared genetic or developmental pathways among morphological traits contribute to the evolution of complexity and diversity, and that developmental bias itself evolves, generating variation in evolvability. As I discuss here, it is now possible to determine the relative importance of natural selection and of genetical and developmental architecture as determinants of organic diversity, particularly for examples of adaptive radiations and parallel evolution. Developmental bias, or genetic channeling, can influence the tempo and direction of evolution and, thus, become reflected in patterns of biodiversity. Twenty years ago, this notion rested on armchair descriptions of potential constraints on evolution. Now, a broad evo-devo approach involving both evolutionary and developmental genetics provides experimental analysis of such bias, revealing how shared genetic or developmental pathways among morphological traits contribute to the evolution of complexity and diversity, and that developmental bias itself evolves, generating variation in evolvability. As I discuss here, it is now possible to determine the relative importance of natural selection and of genetical and developmental architecture as determinants of organic diversity, particularly for examples of adaptive radiations and parallel evolution. one that is impossible to break even over very long periods of time and, thus, of mutational input. A strict constraint, although not impossible to break, would require some form of evolutionary novelty to do so. evolution of similar phenotypic features independently in different lineages, usually from different antecedent features, and assumed to involve different developmental pathways. a bias on the production of various phenotypes caused by the structure, character, composition, or dynamics of the developmental system [20]. external refers to influences on the phenotype via the biotic and abiotic environment of the organism, especially natural selection, whereas internal refers to the processes of genetics, development and physiology, involved directly in making the phenotype and in generating variation in the phenotype. one that involves the internal processes that govern how the phenotype is generated. It can comprise some combination of genetic channeling and developmental bias. leads to a trend in a set of traits towards evolution along a genetic line of least resistance that reflects the consequences of shared genetic pathways and genetic variation [24]. Similarly, a developmental line of least resistance could result from shared developmental pathways. ability of individual parts of an organism, such as repeated pattern elements, limbs, or segments, to develop or evolve independently from one another; the ability of the regulation of development to be modulated independently in different tissues and stages. Different elements within a single module will lack individuality and the ability for independent evolution, but show independence from other modules. hypothetical unconstrained phenotypic space available for occupancy by a particular morphology, usually within an evolutionary lineage. evolution of similar or identical features independently in related lineages, usually considered to be based on similar modifications of the same developmental pathways. phenotypic effect of a gene on more than one trait or character that contributes to a genetic correlation between them. Combinations of pleiotropic effects can account for genetic channeling. effect of a bias in the generation of phenotypic variation, rather than of any strict limitation. Such a bias can affect evolutionary change, for example, because only a limited window of time is available for adaptation in a particular direction in response to a new environment. The basis of such constraints could lie solely in the standing genetic and developmental variation within populations." @default.
• W2109754847 created "2016-06-24" @default.
• W2109754847 creator A5082295183 @default.
• W2109754847 date "2006-07-01" @default.
• W2109754847 modified "2023-10-18" @default.
• W2109754847 title "Evo-devo and constraints on selection" @default.
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• W2109754847 doi "https://doi.org/10.1016/j.tree.2006.05.001" @default.
• W2109754847 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16713653" @default.

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