Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)

In previous papers it was reported that a Robertsonian translocation (centric fusion) affected external phenotype in the grasshopper Leptysma argentina and that thorax height was the target of adult viability selection. In the present paper two populations of L. argentina at different latitudes, wit...

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Detalles Bibliográficos
Autor principal: Colombo, Pablo Cesar
Publicado: 2012
Materias:
Adult survival
Centric fusion
Grasshoppers
Phenotypic and genotypic selection
Selection analysis
Acrididae
Caelifera
Drosophila melanogaster
Leptysma argentina
Orthoptera
Robertsonia
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00087114_v65_n2_p126_Colombo
http://hdl.handle.net/20.500.12110/paper_00087114_v65_n2_p126_Colombo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00087114_v65_n2_p126_Colombo
record_format dspace
spelling paper:paper_00087114_v65_n2_p126_Colombo2023-06-08T14:33:24Z Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera) Colombo, Pablo Cesar Adult survival Centric fusion Grasshoppers Phenotypic and genotypic selection Selection analysis Acrididae Caelifera Drosophila melanogaster Leptysma argentina Orthoptera Robertsonia In previous papers it was reported that a Robertsonian translocation (centric fusion) affected external phenotype in the grasshopper Leptysma argentina and that thorax height was the target of adult viability selection. In the present paper two populations of L. argentina at different latitudes, with different centric fusion frequencies, were studied. It was demonstrated that selection acts on roughly the same targets but in opposite directions. In the northernmost population longevity selection acted primarily on thorax height (TH), leading to an increase of that variable. In the southern population, longevity selection leads to an increased femur length (FL) but to a decreased body size (including TH). Longevity selection affects karyotype frequency, leading to an increase of fusion homozygote frequency; however, fusion 3/6 significantly increases FL. This is consistent with an increase in fusion frequency along the season. The fact that longevity selection in one population increases and in another decreases body size is interpreted as an interaction between environment and body size, of the sort already detected in laboratory strains of Drosophila melanogaster. © 2012 Dipartimento di Biologia Evoluzionistica. Fil:Colombo, P.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00087114_v65_n2_p126_Colombo http://hdl.handle.net/20.500.12110/paper_00087114_v65_n2_p126_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 Adult survival
Centric fusion
Grasshoppers
Phenotypic and genotypic selection
Selection analysis
Acrididae
Caelifera
Drosophila melanogaster
Leptysma argentina
Orthoptera
Robertsonia
spellingShingle Adult survival
Centric fusion
Grasshoppers
Phenotypic and genotypic selection
Selection analysis
Acrididae
Caelifera
Drosophila melanogaster
Leptysma argentina
Orthoptera
Robertsonia
Colombo, Pablo Cesar
Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)
topic_facet Adult survival
Centric fusion
Grasshoppers
Phenotypic and genotypic selection
Selection analysis
Acrididae
Caelifera
Drosophila melanogaster
Leptysma argentina
Orthoptera
Robertsonia
description In previous papers it was reported that a Robertsonian translocation (centric fusion) affected external phenotype in the grasshopper Leptysma argentina and that thorax height was the target of adult viability selection. In the present paper two populations of L. argentina at different latitudes, with different centric fusion frequencies, were studied. It was demonstrated that selection acts on roughly the same targets but in opposite directions. In the northernmost population longevity selection acted primarily on thorax height (TH), leading to an increase of that variable. In the southern population, longevity selection leads to an increased femur length (FL) but to a decreased body size (including TH). Longevity selection affects karyotype frequency, leading to an increase of fusion homozygote frequency; however, fusion 3/6 significantly increases FL. This is consistent with an increase in fusion frequency along the season. The fact that longevity selection in one population increases and in another decreases body size is interpreted as an interaction between environment and body size, of the sort already detected in laboratory strains of Drosophila melanogaster. © 2012 Dipartimento di Biologia Evoluzionistica.
author Colombo, Pablo Cesar
author_facet Colombo, Pablo Cesar
author_sort Colombo, Pablo Cesar
title Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)
title_short Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)
title_full Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)
title_fullStr Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)
title_full_unstemmed Environment-dependent regime of longevity selection in the chromosomally polymorphic species Leptysma argentina (Acrididae: Orthoptera)
title_sort environment-dependent regime of longevity selection in the chromosomally polymorphic species leptysma argentina (acrididae: orthoptera)
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00087114_v65_n2_p126_Colombo
http://hdl.handle.net/20.500.12110/paper_00087114_v65_n2_p126_Colombo
work_keys_str_mv AT colombopablocesar environmentdependentregimeoflongevityselectioninthechromosomallypolymorphicspeciesleptysmaargentinaacrididaeorthoptera
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