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



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ID: 733042.0, MPI für Entwicklungsbiologie / Abteilung 4 - Evolutionary Biology (R. Sommer)
Large-scale diversification without genetic isolation in nematode symbionts of figs
Authors:Susoy, V.; Herrmann, M.; Kanzaki, N.; Kruger, M.; Nguyen, C. N.; Rodelsperger, C.; Roseler, W.; Weiler, C.; Giblin-Davis, R. M.; Ragsdale, E. J.; Sommer, R. J.
Date of Publication (YYYY-MM-DD):2016-01
Title of Journal:Sci Adv
Volume:2
Issue / Number:1
Sequence Number of Article:e1501031
Review Status:Internal review
Audience:Not Specified
Abstract / Description:Diversification is commonly understood to be the divergence of phenotypes accompanying that of lineages. In contrast, alternative phenotypes arising from a single genotype are almost exclusively limited to dimorphism in nature. We report a remarkable case of macroevolutionary-scale diversification without genetic divergence. Upon colonizing the island-like microecosystem of individual figs, symbiotic nematodes of the genus Pristionchus accumulated a polyphenism with up to five discrete adult morphotypes per species. By integrating laboratory and field experiments with extensive genotyping of individuals, including the analysis of 49 genomes from a single species, we show that rapid filling of potential ecological niches is possible without diversifying selection on genotypes. This uncoupling of morphological diversification and speciation in fig-associated nematodes has resulted from a remarkable expansion of discontinuous developmental plasticity.
Free Keywords:Animals; Biological Evolution; Ecology; Ficus/*genetics/*parasitology; Genetic Speciation; Genome/genetics; Genotype; Nematoda/*genetics; Phylogeny; Reproductive Isolation; Symbiosis/*genetics; Developmental plasticity; Pristionchus; adaptive radiation; diversification; figs; genetic isolation; nematodes; predation
External Publication Status:published
Document Type:Article
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, 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan. Department of Genetics, University of Pretoria, Pretoria 0002, South Africa. Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Hanoi, Vietnam. Fort Lauderdale Research and Education Center, University of Florida-IFAS, 3205 College Avenue, Fort Lauderdale, FL 33314, USA. Department of Biology, Indiana University, 915 East 3rd Street, Bloomington, IN 47405, USA.
Identifiers:ISSN:2375-2548 (Linking) %R 10.1126/sciadv.1501031 [ID No:1]
URL:https://www.ncbi.nlm.nih.gov/pubmed/26824073 [ID No:2]
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