ArticleBMC evolutionary biology2019
Evolution of asexual Daphnia pulex in Japan: variations and covariations of the digestive, morphological and life history traits.
Article in BMC evolutionary biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Phenotypic Integration Facilitates Plasticity Through Reorganization of Traits Under Multiple Stress: Evidence From Asexual Water Flea Genotypes.Ecology and evolution · 2026Article
- What the Dying are Saying to the Living: Mixed Conspecific Alarm Cues Reverse Competitive Hierarchies by Reshaping Genotype-Specific Life Histories.Ecology and evolution · 2026Article
- Host Genetic Constraints on the Horizontal Transmission of Daphnia-associated Microbiota.Microbes and environments · 2026Article
- Different photoperiodic responses in diapause induction can promote the maintenance of genetic diversity via the storage effect inProceedings. Biological sciences · 2024Article
- Invasions of an obligate asexual daphnid species support the nearly neutral theory.Scientific reports · 2022Article
- Centennial clonal stability of asexualEcology and evolution · 2020Article
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Authors and funding
3 authors.
Funding
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Abstract
backgroundSeveral genetic lineages of obligate parthenogenetic Daphnia pulex, a common zooplankton species, have invaded Japan from North America. Among these, a lineage named JPN1 is thought to have started colonization as a single genotype several hundred to thousand years ago and subsequently produced many genotypes in Japan. To examine the phenotypic variations due to ecological drivers diverging the genotypes in new habitats, we measured heritability and variation in 17 traits, including life history, morphology and digestive traits, and the genetic distance among the D. pulex JPN1 genotypes in Japan.
resultsWe found that most of the traits measured varied significantly among the genotypes and that heritability was highest in the morphological traits, followed by the digestive and life history traits. In addition, 93% of the variation in these traits was explained by the first three components in the principal component analysis, implying that variation of these heritable traits is not random but rather converged into a few directions. These relations among traits revealed the potential importance of predation pressures and food conditions as factors for diverging and selecting different genotypes. However, the magnitude of the difference in any single trait group did not correlate with the genetic distance.
conclusionsOur findings show that the divergent traits evolved within D. pulex JPN1 lineage without genetic recombination, since their ancestral clone invaded Japan. Large variations and covariations of the phenotypic traits, irrespective of the genetic distance among the genotypes, support the view that the invasive success of D. pulex JPN1 was promoted by a genetic architecture that allowed for large phenotypic variations with a limited number of functionally important mutations without recombination.
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