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Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum

The genetic basis of color polymorphism is explored in the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Sternorrhyncha), in which two color morphs have been described (pink or green). Laboratory crosses and a Mendelian genetic analysis reveal that color polymorphism in pea aphids is determine...

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Detalles Bibliográficos
Autores principales: Caillaud, Marina C., Losey, John E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: University of Wisconsin Library 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3383419/
https://www.ncbi.nlm.nih.gov/pubmed/20673119
http://dx.doi.org/10.1673/031.010.9501
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author Caillaud, Marina C.
Losey, John E.
author_facet Caillaud, Marina C.
Losey, John E.
author_sort Caillaud, Marina C.
collection PubMed
description The genetic basis of color polymorphism is explored in the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Sternorrhyncha), in which two color morphs have been described (pink or green). Laboratory crosses and a Mendelian genetic analysis reveal that color polymorphism in pea aphids is determined by a single biallelic locus, which we name colorama, with alleles P and p, pink being dominant to green. The putative genotypes are Pp or PP for pink morphs, and pp for green morphs. This locus is shown to be autosomal. Last, there was no evidence of influence of the direction of the cross on color inheritance, thus showing that cytoplasmic effects and/or maternally-inherited symbionts play no role in the inheritance of color polymorphism in pea aphids. The existence of a simple genetic determinism for color polymorphism in a system in which genetic investigation is possible may facilitate investigations on the physiological and molecular mechanisms of genetically-based color morph variation, and the establishment of a link between this locus and fitness in a range of ecological conditions.
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spelling pubmed-33834192012-06-28 Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum Caillaud, Marina C. Losey, John E. J Insect Sci Article The genetic basis of color polymorphism is explored in the pea aphid, Acyrthosiphon pisum (Harris) (Homoptera: Sternorrhyncha), in which two color morphs have been described (pink or green). Laboratory crosses and a Mendelian genetic analysis reveal that color polymorphism in pea aphids is determined by a single biallelic locus, which we name colorama, with alleles P and p, pink being dominant to green. The putative genotypes are Pp or PP for pink morphs, and pp for green morphs. This locus is shown to be autosomal. Last, there was no evidence of influence of the direction of the cross on color inheritance, thus showing that cytoplasmic effects and/or maternally-inherited symbionts play no role in the inheritance of color polymorphism in pea aphids. The existence of a simple genetic determinism for color polymorphism in a system in which genetic investigation is possible may facilitate investigations on the physiological and molecular mechanisms of genetically-based color morph variation, and the establishment of a link between this locus and fitness in a range of ecological conditions. University of Wisconsin Library 2010-07-08 /pmc/articles/PMC3383419/ /pubmed/20673119 http://dx.doi.org/10.1673/031.010.9501 Text en © 2010 http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Article
Caillaud, Marina C.
Losey, John E.
Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum
title Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum
title_full Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum
title_fullStr Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum
title_full_unstemmed Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum
title_short Genetics of Color Polymorphism in the Pea Aphid, Acyrthosiphon pisum
title_sort genetics of color polymorphism in the pea aphid, acyrthosiphon pisum
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3383419/
https://www.ncbi.nlm.nih.gov/pubmed/20673119
http://dx.doi.org/10.1673/031.010.9501
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