Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)

Grasshoppers have been much less studied than Drosophila when it comes to inversion polymorphisms, despite the occurrence of this rearrangement in several species of grasshoppers. In the present study, 354 males from a natural population of the New World species Trimerotropis pallidipennis, polymorp...

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Autor principal: Colombo, Pablo Cesar
Publicado: 2003
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age
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v139_n1_p68_Colombo
http://hdl.handle.net/20.500.12110/paper_00180661_v139_n1_p68_Colombo
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spelling paper:paper_00180661_v139_n1_p68_Colombo2023-06-08T14:39:17Z Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera) Colombo, Pablo Cesar age altitude article chromosome pairing controlled study gamete gene frequency gene rearrangement genetic polymorphism grasshopper karyotype latitude lifespan longevity male morphometrics natural population natural selection nonhuman Orthoptera pericentric chromosome inversion phenotype population genetics species distribution species identification Trimerotropis pallidipennis Animals Chromosome Mapping Grasshoppers Karyotyping Linkage Disequilibrium Male Orthoptera Phenotype Polymorphism, Genetic Regression Analysis Time Factors Insecta Orthoptera Trimerotropis Grasshoppers have been much less studied than Drosophila when it comes to inversion polymorphisms, despite the occurrence of this rearrangement in several species of grasshoppers. In the present study, 354 males from a natural population of the New World species Trimerotropis pallidipennis, polymorphic for 6 pericentric inversions in 4 chromosome pairs, were sampled at the beginning and at the end of the adult life span. This sampling, along with the fact that generations in this grasshopper are annual and discrete, was done to detect differential adult male longevity among karyotypes and departures from formal null models, such as gametic phase equilibrium. These methods allow the detection of natural selection taking place in the wild. The comparison between age classes showed that some inversions were significantly more frequent in one sample, thus revealing the operation of natural selection. Gametic phase disequilibrium was detected in the sample of aged males but not in the sample of young ones. Furthermore, here we aim to detect the phenotypic targets of longevity selection by examining morphometric characters, in order to have a clearer idea of the relation between inversions and natural selection in this species. These results corroborate previous studies that suggested that the inversions are involved in natural selection, and an adaptive model has been proposed for the pattern of inversion frequencies throughout several populations at different altitudes and latitudes. Fil:Colombo, P.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v139_n1_p68_Colombo http://hdl.handle.net/20.500.12110/paper_00180661_v139_n1_p68_Colombo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic age
altitude
article
chromosome pairing
controlled study
gamete
gene frequency
gene rearrangement
genetic polymorphism
grasshopper
karyotype
latitude
lifespan
longevity
male
morphometrics
natural population
natural selection
nonhuman
Orthoptera
pericentric chromosome inversion
phenotype
population genetics
species distribution
species identification
Trimerotropis pallidipennis
Animals
Chromosome Mapping
Grasshoppers
Karyotyping
Linkage Disequilibrium
Male
Orthoptera
Phenotype
Polymorphism, Genetic
Regression Analysis
Time Factors
Insecta
Orthoptera
Trimerotropis
spellingShingle age
altitude
article
chromosome pairing
controlled study
gamete
gene frequency
gene rearrangement
genetic polymorphism
grasshopper
karyotype
latitude
lifespan
longevity
male
morphometrics
natural population
natural selection
nonhuman
Orthoptera
pericentric chromosome inversion
phenotype
population genetics
species distribution
species identification
Trimerotropis pallidipennis
Animals
Chromosome Mapping
Grasshoppers
Karyotyping
Linkage Disequilibrium
Male
Orthoptera
Phenotype
Polymorphism, Genetic
Regression Analysis
Time Factors
Insecta
Orthoptera
Trimerotropis
Colombo, Pablo Cesar
Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)
topic_facet age
altitude
article
chromosome pairing
controlled study
gamete
gene frequency
gene rearrangement
genetic polymorphism
grasshopper
karyotype
latitude
lifespan
longevity
male
morphometrics
natural population
natural selection
nonhuman
Orthoptera
pericentric chromosome inversion
phenotype
population genetics
species distribution
species identification
Trimerotropis pallidipennis
Animals
Chromosome Mapping
Grasshoppers
Karyotyping
Linkage Disequilibrium
Male
Orthoptera
Phenotype
Polymorphism, Genetic
Regression Analysis
Time Factors
Insecta
Orthoptera
Trimerotropis
description Grasshoppers have been much less studied than Drosophila when it comes to inversion polymorphisms, despite the occurrence of this rearrangement in several species of grasshoppers. In the present study, 354 males from a natural population of the New World species Trimerotropis pallidipennis, polymorphic for 6 pericentric inversions in 4 chromosome pairs, were sampled at the beginning and at the end of the adult life span. This sampling, along with the fact that generations in this grasshopper are annual and discrete, was done to detect differential adult male longevity among karyotypes and departures from formal null models, such as gametic phase equilibrium. These methods allow the detection of natural selection taking place in the wild. The comparison between age classes showed that some inversions were significantly more frequent in one sample, thus revealing the operation of natural selection. Gametic phase disequilibrium was detected in the sample of aged males but not in the sample of young ones. Furthermore, here we aim to detect the phenotypic targets of longevity selection by examining morphometric characters, in order to have a clearer idea of the relation between inversions and natural selection in this species. These results corroborate previous studies that suggested that the inversions are involved in natural selection, and an adaptive model has been proposed for the pattern of inversion frequencies throughout several populations at different altitudes and latitudes.
author Colombo, Pablo Cesar
author_facet Colombo, Pablo Cesar
author_sort Colombo, Pablo Cesar
title Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)
title_short Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)
title_full Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)
title_fullStr Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)
title_full_unstemmed Inversion polymorphisms and natural selection in Trimerotropis pallidipennis (Orthoptera)
title_sort inversion polymorphisms and natural selection in trimerotropis pallidipennis (orthoptera)
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v139_n1_p68_Colombo
http://hdl.handle.net/20.500.12110/paper_00180661_v139_n1_p68_Colombo
work_keys_str_mv AT colombopablocesar inversionpolymorphismsandnaturalselectionintrimerotropispallidipennisorthoptera
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