Hierarchical analysis of population genetic variation in mitochondrial and nuclear genes of Daphnia pulex

T. J. Crease, Michael Lynch, K. Spitze

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

The geographic structure of Daphnia pulex populations from the central United States is analyzed with respect to isozyme and mitochondrial DNA variation. The species complex consists of cyclic and obligate parthenogens. A hierarchical analysis of population structure in the cyclic parthenogens by using a fixation-index approach indicates that this is one of the most extremely subdivided species yet studied. This genetic structure, much of which accrues within 100 km, is certainly due in part to the limited dispersal ability of Daphnia. However, previous work has shown that fluctuating selection can account for the spatial heterogeneity in isozyme frequencies in these populations. This may explain why the population subdivision for the mitochondrial genome increases approximately three times as rapidly with distance as does that for nuclear genes, which is slower than the neutral expectation. The obligate parthenogens are shown to be polyphyletic in origin, evolutionarily young, and, in some cases, geographically widespread.

Original languageEnglish (US)
Pages (from-to)444-458
Number of pages15
JournalMolecular Biology and Evolution
Volume7
Issue number5
StatePublished - Oct 2 1990
Externally publishedYes

Fingerprint

Daphnia
Daphnia pulex
Mitochondrial Genes
Population Genetics
species complex
mitochondrial DNA
genetic structure
population genetics
fixation
population structure
genetic variation
isozymes
genome
Midwestern United States
gene
founder effect
Population
Isoenzymes
genes
Mitochondrial Genome

Keywords

  • Daphnia
  • geographic variation
  • isozymes
  • mitochondrial DNA
  • population structure

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

Cite this

Hierarchical analysis of population genetic variation in mitochondrial and nuclear genes of Daphnia pulex. / Crease, T. J.; Lynch, Michael; Spitze, K.

In: Molecular Biology and Evolution, Vol. 7, No. 5, 02.10.1990, p. 444-458.

Research output: Contribution to journalArticle

@article{876dd9256f9c49c08a0b918a6df71c9c,
title = "Hierarchical analysis of population genetic variation in mitochondrial and nuclear genes of Daphnia pulex",
abstract = "The geographic structure of Daphnia pulex populations from the central United States is analyzed with respect to isozyme and mitochondrial DNA variation. The species complex consists of cyclic and obligate parthenogens. A hierarchical analysis of population structure in the cyclic parthenogens by using a fixation-index approach indicates that this is one of the most extremely subdivided species yet studied. This genetic structure, much of which accrues within 100 km, is certainly due in part to the limited dispersal ability of Daphnia. However, previous work has shown that fluctuating selection can account for the spatial heterogeneity in isozyme frequencies in these populations. This may explain why the population subdivision for the mitochondrial genome increases approximately three times as rapidly with distance as does that for nuclear genes, which is slower than the neutral expectation. The obligate parthenogens are shown to be polyphyletic in origin, evolutionarily young, and, in some cases, geographically widespread.",
keywords = "Daphnia, geographic variation, isozymes, mitochondrial DNA, population structure",
author = "Crease, {T. J.} and Michael Lynch and K. Spitze",
year = "1990",
month = "10",
day = "2",
language = "English (US)",
volume = "7",
pages = "444--458",
journal = "Molecular Biology and Evolution",
issn = "0737-4038",
publisher = "Oxford University Press",
number = "5",

}

TY - JOUR

T1 - Hierarchical analysis of population genetic variation in mitochondrial and nuclear genes of Daphnia pulex

AU - Crease, T. J.

AU - Lynch, Michael

AU - Spitze, K.

PY - 1990/10/2

Y1 - 1990/10/2

N2 - The geographic structure of Daphnia pulex populations from the central United States is analyzed with respect to isozyme and mitochondrial DNA variation. The species complex consists of cyclic and obligate parthenogens. A hierarchical analysis of population structure in the cyclic parthenogens by using a fixation-index approach indicates that this is one of the most extremely subdivided species yet studied. This genetic structure, much of which accrues within 100 km, is certainly due in part to the limited dispersal ability of Daphnia. However, previous work has shown that fluctuating selection can account for the spatial heterogeneity in isozyme frequencies in these populations. This may explain why the population subdivision for the mitochondrial genome increases approximately three times as rapidly with distance as does that for nuclear genes, which is slower than the neutral expectation. The obligate parthenogens are shown to be polyphyletic in origin, evolutionarily young, and, in some cases, geographically widespread.

AB - The geographic structure of Daphnia pulex populations from the central United States is analyzed with respect to isozyme and mitochondrial DNA variation. The species complex consists of cyclic and obligate parthenogens. A hierarchical analysis of population structure in the cyclic parthenogens by using a fixation-index approach indicates that this is one of the most extremely subdivided species yet studied. This genetic structure, much of which accrues within 100 km, is certainly due in part to the limited dispersal ability of Daphnia. However, previous work has shown that fluctuating selection can account for the spatial heterogeneity in isozyme frequencies in these populations. This may explain why the population subdivision for the mitochondrial genome increases approximately three times as rapidly with distance as does that for nuclear genes, which is slower than the neutral expectation. The obligate parthenogens are shown to be polyphyletic in origin, evolutionarily young, and, in some cases, geographically widespread.

KW - Daphnia

KW - geographic variation

KW - isozymes

KW - mitochondrial DNA

KW - population structure

UR - http://www.scopus.com/inward/record.url?scp=0025050624&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025050624&partnerID=8YFLogxK

M3 - Article

VL - 7

SP - 444

EP - 458

JO - Molecular Biology and Evolution

JF - Molecular Biology and Evolution

SN - 0737-4038

IS - 5

ER -