Cited by 797Animal Behavior and ReproductionEvolution and Genetic DynamicsGenetic diversity and population structure

Population structure in Daphnia obtusa: quantitative genetic and allozymic variation.

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Spitze, K·1993·Genetics

Abstract

Quantitative genetic analyses for body size and for life history characters within and among populations of Daphnia obtusa reveal substantial genetic variance at both hierarchical levels for all traits measured. Simultaneous allozymic analysis on the same population samples indicate a moderate degree of differentiation: GST = 0.28. No associations between electrophoretic genotype and phenotypic characters were found, providing support for the null hypothesis that the allozymic variants are effectively neutral. Therefore, GST can be used as the null hypothesis that neutral phenotypic evolution within populations led to the observed differentiation for the quantitative traits, which I call QST. The results of this study provide evidence that natural selection has promoted diversification for body size among populations, and has impeded diversification for relative fitness. Analyses of population differentiation for clutch size, age at reproduction, and growth rate indicate that neutral phenotypic evolution cannot be excluded as the cause.

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Crossref · 10.1093/genetics/135.2.367

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Authors
Spitze, K.
Affiliations
University of Miami (US)
Corresponding author
Spitze, K
Venue
Genetics
Published
1993-10-01
Volume
135
Issue
2
Pages
367-374
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2098737273
Cited by
797
References
1
Citations by year
2026: 12 · 2025: 21 · 2024: 27 · 2023: 18 · 2022: 25 · 2021: 23 · 2020: 30 · 2019: 37 · 2018: 38 · 2017: 27 · 2016: 32 · 2015: 45 · 2014: 45 · 2013: 45 · 2012: 30
FWCI
8.19
Type
journal article
Language
en
Open access
Locations
  • Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
Keywords
Daphnia obtusa, population structure, quantitative genetic variation, body size, life-history traits, genetic differentiation, natural selection, neutral evolution, quantitative sensory testing, relative fitness, clutch size, age at reproduction, growth rate
MeSH terms
Analysis of Variance, Animals, Daphnia, Electrophoresis, Starch Gel, Gene Frequency, Genotype, Isoenzymes, Genetic Variation

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