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Phenotypic and genetic variations in obligate parthenogenetic populations of eriosoma lanigerum hausmann (Hemiptera: Aphididae)

Ruiz Montoya, Lorena, 1964- | Zúñiga, G [autor/a] | Cisneros, R [autor/a] | Salinas Moreno, Yolanda [autor/a] | Peña Martínez, Rebeca [autor/a] | Machkour M'Rabet, Salima [autor/a].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Eriosoma lanigerum | Variación genética | Variación morfológica | Pyracantha koidzumii | Plantas huéspedes | PartenogénesisTema(s) en inglés: Woolly apple aphid | Genetic variation | Morphological variation | Pyracantha koidzumii | Host plants | ParthenogenesisDescriptor(es) geográficos: Villa Coapa (Distrito Federal, México)Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Ecology, Behavior and Bionomics. Neotropical Entomology. volumen 44, número 6 (December 2015), páginas 534-545. --ISSN: 1678-8052Número de sistema: 5106Resumen:
Inglés

The study of phenotypic and genetic variation of obligate parthenogenetic organisms contributes to an understanding of evolution in the absence of genetic variation produced by sexual reproduction. Eriosoma lanigerum Hausmann undergoes obligate parthenogenesis in Mexico City, Mexico, due to the unavailability of the host plants required for sexual reproduction. We analysed the phenotypic and genetic variation of E. lanigerum in relation to the dry and wet season and plant phenology. Aphids were collected on two occasions per season on a secondary host plant, Pyracantha koidzumii, at five different sites in the southern area of Mexico City, Mexico. Thirteen morphological characteristics were measured from 147 to 276 individuals per site and per season. A multivariate analysis of variance was performed to test the effect of the season, site and their interaction on morphological traits. Morphological variation was summarised using a principal component analysis. Genetic variation was described using six enzymatic loci, four of which were polymorphic. Our study showed that the site and season has a significant effect on morphological trait variation. The largest aphids were recorded during cold temperatures with low relative humidity and when the plant was at the end of the fruiting period. The mean genetic diversity was low (mean H e = 0.161), and populations were genetically structured by season and site. Morphological and genetic variations appear to be associated with environmental factors that directly affect aphid development and/or indirectly by host plant phenology.

Recurso en línea: http://link.springer.com/article/10.1007%2Fs13744-015-0318-1
Lista(s) en las que aparece este ítem: Lorena Ruiz Montoya
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The study of phenotypic and genetic variation of obligate parthenogenetic organisms contributes to an understanding of evolution in the absence of genetic variation produced by sexual reproduction. Eriosoma lanigerum Hausmann undergoes obligate parthenogenesis in Mexico City, Mexico, due to the unavailability of the host plants required for sexual reproduction. We analysed the phenotypic and genetic variation of E. lanigerum in relation to the dry and wet season and plant phenology. Aphids were collected on two occasions per season on a secondary host plant, Pyracantha koidzumii, at five different sites in the southern area of Mexico City, Mexico. Thirteen morphological characteristics were measured from 147 to 276 individuals per site and per season. A multivariate analysis of variance was performed to test the effect of the season, site and their interaction on morphological traits. Morphological variation was summarised using a principal component analysis. Genetic variation was described using six enzymatic loci, four of which were polymorphic. Our study showed that the site and season has a significant effect on morphological trait variation. The largest aphids were recorded during cold temperatures with low relative humidity and when the plant was at the end of the fruiting period. The mean genetic diversity was low (mean H e = 0.161), and populations were genetically structured by season and site. Morphological and genetic variations appear to be associated with environmental factors that directly affect aphid development and/or indirectly by host plant phenology. eng

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