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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 4 - Evolutionary Biology (R. Sommer)     Display Documents



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ID: 718293.0, MPI für Entwicklungsbiologie / Abteilung 4 - Evolutionary Biology (R. Sommer)
Rapid diversification associated with a macroevolutionary pulse of developmental plasticity
Authors:Susoy, V.; Ragsdale, E. J.; Kanzaki, N.; Sommer, R. J.
Language:English
Date of Publication (YYYY-MM-DD):2015-02-04
Title of Journal:eLife
Journal Abbrev.:Elife
Volume:4
Sequence Number of Article:25650739
Review Status:Internal review
Audience:Experts Only
Abstract / Description:Developmental plasticity has been proposed to facilitate phenotypic diversification in plants and animals, but the macroevolutionary potential of plastic traits remains to be objectively tested. We studied the evolution of feeding structures in a group of 90 nematodes, including Caenorhabditis elegans, some species of which have evolved a mouthpart polyphenism, moveable teeth, and predatory feeding. Comparative analyses of shape and form, using geometric morphometrics, and of structural complexity revealed a rapid process of diversification associated with developmental plasticity. First, dimorphism was associated with a sharp increase in complexity and elevated evolutionary rates, represented by a radiation of feeding-forms with structural novelties. Second, the subsequent assimilation of a single phenotype coincided with a decrease in mouthpart complexity but an even stronger increase in evolutionary rates. Our results suggest that a macroevolutionary 'pulse' of plasticity promotes novelties and, even after the secondary fixation of phenotypes, permits sustained rapid exploration of morphospace.
Free Keywords:Animals; *Biological Evolution; Caenorhabditis elegans/*growth & development; C. elegans; Pristionchus pacificus; complexity; developmental plasticity; evolutionary biology; evolutionary rates; genomics; nematodes
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:MPI für Entwickungsbiologie
Affiliations:MPI für Entwicklungsbiologie/Abteilung 4 - Evolutionsbiologie (Ralf J. Sommer)
External Affiliations:Forest Pathology Laboratory, Forestry and Forest Products Research Institute, Tsukuba, Japan.
Identifiers:ISSN:2050-084X (Electronic) 2050-084X (Linking) %R 10.7... [ID No:1]
URL:http://www.ncbi.nlm.nih.gov/pubmed/25650739 [ID No:2]
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