Gene flow in colonizing Hippodamia variegata ladybird beetle populations

E. S. Krafsur; J. J. Obrycki; P. Nariboli

doi:10.1093/oxfordjournals.jhered.a022951

Gene flow in colonizing Hippodamia variegata ladybird beetle populations

E. S. Krafsur, J. J. Obrycki, P. Nariboli

Entomology

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Genetic diversity and gene flow at allozyme loci was investigated in natural and laboratory-reared populations of the predatory ladybird species Hippodamia variegata, a recently naturalized beetle from the Palaearctic. Gene diversity was 24.9 ± 4.9% at 28 resolved loci and 31.6 ± 5.5% at 22 polymorphic loci. Average gene diversity at nine polymorphic loci was only slightly greater among field-collected beetles than among laboratory-cultured beetles. There were five alleles in cultured beetles not found in natural U.S. population samples. Wright's F statistics showed modest genetic differentiation among two field collections from the northeastern United States and one from Europe (F(ST) = 0.107 ± 0.077). Analysis of variance in gene frequencies in these feral ladybirds showed that about 97% of the variance existed within populations of this colonizing species. A substantial level of genetic differentiation was detected among 10 laboratory populations descended from collections made in Europe, Asia, North Africa, and Chile (F(ST) = 0.191 ± 0.021). Drift is the most likely explanation for this differentiation.

Original language	English
Pages (from-to)	41-47
Number of pages	7
Journal	Journal of Heredity
Volume	87
Issue number	1
DOIs	https://doi.org/10.1093/oxfordjournals.jhered.a022951
State	Published - 1996

Bibliographical note

Funding Information:
From the Department of Entomology, Iowa State University, Ames, IA 50011. This is Journal paper no. J-15929 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa; project no. 2949. Thanks to Deb Nelson and Julie Gould, USDA-APH1S Biological Control Laboratory, Niles, Michigan, for supplying laboratory-reared beetles, and Donna Ellis, University of Connecticut, and Lisa Tewkesbury, University of Rhode Island, for collecting wild beetles. This research was partly supported by USDA-APHIS grant no. 12-34-81-016&GR and CSRS USDA grant 94-37312-0673. Address reprint requests to Dr. E. S. Krafsur at the address above.

Funding

From the Department of Entomology, Iowa State University, Ames, IA 50011. This is Journal paper no. J-15929 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa; project no. 2949. Thanks to Deb Nelson and Julie Gould, USDA-APH1S Biological Control Laboratory, Niles, Michigan, for supplying laboratory-reared beetles, and Donna Ellis, University of Connecticut, and Lisa Tewkesbury, University of Rhode Island, for collecting wild beetles. This research was partly supported by USDA-APHIS grant no. 12-34-81-016&GR and CSRS USDA grant 94-37312-0673. Address reprint requests to Dr. E. S. Krafsur at the address above.

Funders	Funder number
USDA/CSRS	94-37312-0673
USDA-APHIS	12-34-81-016

ASJC Scopus subject areas

Biotechnology
Molecular Biology
Genetics
Genetics(clinical)

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10.1093/oxfordjournals.jhered.a022951

Cite this

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title = "Gene flow in colonizing Hippodamia variegata ladybird beetle populations",

abstract = "Genetic diversity and gene flow at allozyme loci was investigated in natural and laboratory-reared populations of the predatory ladybird species Hippodamia variegata, a recently naturalized beetle from the Palaearctic. Gene diversity was 24.9 ± 4.9% at 28 resolved loci and 31.6 ± 5.5% at 22 polymorphic loci. Average gene diversity at nine polymorphic loci was only slightly greater among field-collected beetles than among laboratory-cultured beetles. There were five alleles in cultured beetles not found in natural U.S. population samples. Wright's F statistics showed modest genetic differentiation among two field collections from the northeastern United States and one from Europe (F(ST) = 0.107 ± 0.077). Analysis of variance in gene frequencies in these feral ladybirds showed that about 97% of the variance existed within populations of this colonizing species. A substantial level of genetic differentiation was detected among 10 laboratory populations descended from collections made in Europe, Asia, North Africa, and Chile (F(ST) = 0.191 ± 0.021). Drift is the most likely explanation for this differentiation.",

author = "Krafsur, {E. S.} and Obrycki, {J. J.} and P. Nariboli",

note = "Funding Information: From the Department of Entomology, Iowa State University, Ames, IA 50011. This is Journal paper no. J-15929 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa; project no. 2949. Thanks to Deb Nelson and Julie Gould, USDA-APH1S Biological Control Laboratory, Niles, Michigan, for supplying laboratory-reared beetles, and Donna Ellis, University of Connecticut, and Lisa Tewkesbury, University of Rhode Island, for collecting wild beetles. This research was partly supported by USDA-APHIS grant no. 12-34-81-016&GR and CSRS USDA grant 94-37312-0673. Address reprint requests to Dr. E. S. Krafsur at the address above.",

year = "1996",

doi = "10.1093/oxfordjournals.jhered.a022951",

language = "English",

volume = "87",

pages = "41--47",

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N1 - Funding Information: From the Department of Entomology, Iowa State University, Ames, IA 50011. This is Journal paper no. J-15929 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa; project no. 2949. Thanks to Deb Nelson and Julie Gould, USDA-APH1S Biological Control Laboratory, Niles, Michigan, for supplying laboratory-reared beetles, and Donna Ellis, University of Connecticut, and Lisa Tewkesbury, University of Rhode Island, for collecting wild beetles. This research was partly supported by USDA-APHIS grant no. 12-34-81-016&GR and CSRS USDA grant 94-37312-0673. Address reprint requests to Dr. E. S. Krafsur at the address above.

PY - 1996

Y1 - 1996

N2 - Genetic diversity and gene flow at allozyme loci was investigated in natural and laboratory-reared populations of the predatory ladybird species Hippodamia variegata, a recently naturalized beetle from the Palaearctic. Gene diversity was 24.9 ± 4.9% at 28 resolved loci and 31.6 ± 5.5% at 22 polymorphic loci. Average gene diversity at nine polymorphic loci was only slightly greater among field-collected beetles than among laboratory-cultured beetles. There were five alleles in cultured beetles not found in natural U.S. population samples. Wright's F statistics showed modest genetic differentiation among two field collections from the northeastern United States and one from Europe (F(ST) = 0.107 ± 0.077). Analysis of variance in gene frequencies in these feral ladybirds showed that about 97% of the variance existed within populations of this colonizing species. A substantial level of genetic differentiation was detected among 10 laboratory populations descended from collections made in Europe, Asia, North Africa, and Chile (F(ST) = 0.191 ± 0.021). Drift is the most likely explanation for this differentiation.

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Gene flow in colonizing Hippodamia variegata ladybird beetle populations

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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