Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)

The South-American species Leptysma argentina Bruner is polymorphic for a centric fusion between chromosomal pairs 3 and 6 (fusion 3/6). Cytogenetic and morphological studies revealed that fusion 3/6 significantly increases some morphometric variables in males. A selection components study showed th...

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Detalles Bibliográficos
Autores principales: Colombo, Pablo Cesar, Pensel, Sara M.
Publicado: 2004
Materias:
Centric fusion
Female mating success
Leptysma argentina
Morphometric variables
Orthoptera
animal
article
body size
chromosome
cross breeding
female
genetic polymorphism
genetic selection
genetics
histology
male
multivariate analysis
phenotype
sexual behavior
Animals
Body Size
Chromosomes
Crosses, Genetic
Female
Male
Multivariate Analysis
Phenotype
Polymorphism, Genetic
Selection (Genetics)
Sexual Behavior, Animal
Insecta
Leptysma
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v121_n1_p25_Colombo
http://hdl.handle.net/20.500.12110/paper_00166707_v121_n1_p25_Colombo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00166707_v121_n1_p25_Colombo
record_format dspace
spelling paper:paper_00166707_v121_n1_p25_Colombo2023-06-08T14:38:26Z Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera) Colombo, Pablo Cesar Pensel, Sara M. Centric fusion Female mating success Leptysma argentina Morphometric variables Orthoptera animal article body size chromosome cross breeding female genetic polymorphism genetic selection genetics histology male multivariate analysis Orthoptera phenotype sexual behavior Animals Body Size Chromosomes Crosses, Genetic Female Male Multivariate Analysis Orthoptera Phenotype Polymorphism, Genetic Selection (Genetics) Sexual Behavior, Animal Insecta Leptysma Orthoptera The South-American species Leptysma argentina Bruner is polymorphic for a centric fusion between chromosomal pairs 3 and 6 (fusion 3/6). Cytogenetic and morphological studies revealed that fusion 3/6 significantly increases some morphometric variables in males. A selection components study showed that the fusion is positively selected for longevity, the direct effect being exerted on thorax height. Moreover, a unisexual approach revealed that sexual male selection acts by increasing third femur length. In the present study the effect of fusion 3/6 on morphometric variables and the effect of body size and karyotype on mating success in both males and females were analysed through a bisexual approach. Total body length (TL) and third femur length (FL) were significantly larger amongst the fusion carrier females. Besides, the largest females and the carriers of the fusion have increased mating success. The selection differential suggests that directional sexual selection favours the females with increased TL and fusion dosage; however, the selection gradient revealed that none of the variables here analysed is a direct target of sexual selection. The male sexual selection study agrees with previous results, showing the importance of the third pair of legs in male mating success among grasshoppers. Fil:Colombo, P.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pensel, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v121_n1_p25_Colombo http://hdl.handle.net/20.500.12110/paper_00166707_v121_n1_p25_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 Centric fusion
Female mating success
Leptysma argentina
Morphometric variables
Orthoptera
animal
article
body size
chromosome
cross breeding
female
genetic polymorphism
genetic selection
genetics
histology
male
multivariate analysis
Orthoptera
phenotype
sexual behavior
Animals
Body Size
Chromosomes
Crosses, Genetic
Female
Male
Multivariate Analysis
Orthoptera
Phenotype
Polymorphism, Genetic
Selection (Genetics)
Sexual Behavior, Animal
Insecta
Leptysma
Orthoptera
spellingShingle Centric fusion
Female mating success
Leptysma argentina
Morphometric variables
Orthoptera
animal
article
body size
chromosome
cross breeding
female
genetic polymorphism
genetic selection
genetics
histology
male
multivariate analysis
Orthoptera
phenotype
sexual behavior
Animals
Body Size
Chromosomes
Crosses, Genetic
Female
Male
Multivariate Analysis
Orthoptera
Phenotype
Polymorphism, Genetic
Selection (Genetics)
Sexual Behavior, Animal
Insecta
Leptysma
Orthoptera
Colombo, Pablo Cesar
Pensel, Sara M.
Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)
topic_facet Centric fusion
Female mating success
Leptysma argentina
Morphometric variables
Orthoptera
animal
article
body size
chromosome
cross breeding
female
genetic polymorphism
genetic selection
genetics
histology
male
multivariate analysis
Orthoptera
phenotype
sexual behavior
Animals
Body Size
Chromosomes
Crosses, Genetic
Female
Male
Multivariate Analysis
Orthoptera
Phenotype
Polymorphism, Genetic
Selection (Genetics)
Sexual Behavior, Animal
Insecta
Leptysma
Orthoptera
description The South-American species Leptysma argentina Bruner is polymorphic for a centric fusion between chromosomal pairs 3 and 6 (fusion 3/6). Cytogenetic and morphological studies revealed that fusion 3/6 significantly increases some morphometric variables in males. A selection components study showed that the fusion is positively selected for longevity, the direct effect being exerted on thorax height. Moreover, a unisexual approach revealed that sexual male selection acts by increasing third femur length. In the present study the effect of fusion 3/6 on morphometric variables and the effect of body size and karyotype on mating success in both males and females were analysed through a bisexual approach. Total body length (TL) and third femur length (FL) were significantly larger amongst the fusion carrier females. Besides, the largest females and the carriers of the fusion have increased mating success. The selection differential suggests that directional sexual selection favours the females with increased TL and fusion dosage; however, the selection gradient revealed that none of the variables here analysed is a direct target of sexual selection. The male sexual selection study agrees with previous results, showing the importance of the third pair of legs in male mating success among grasshoppers.
author Colombo, Pablo Cesar
Pensel, Sara M.
author_facet Colombo, Pablo Cesar
Pensel, Sara M.
author_sort Colombo, Pablo Cesar
title Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)
title_short Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)
title_full Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)
title_fullStr Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)
title_full_unstemmed Chromosomal polymorphism, morphometric traits and mating success in Leptysma argentina Bruner (Orthoptera)
title_sort chromosomal polymorphism, morphometric traits and mating success in leptysma argentina bruner (orthoptera)
publishDate 2004
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v121_n1_p25_Colombo
http://hdl.handle.net/20.500.12110/paper_00166707_v121_n1_p25_Colombo
work_keys_str_mv AT colombopablocesar chromosomalpolymorphismmorphometrictraitsandmatingsuccessinleptysmaargentinabrunerorthoptera
AT penselsaram chromosomalpolymorphismmorphometrictraitsandmatingsuccessinleptysmaargentinabrunerorthoptera
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