Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera)
Leptysma argentina (Acrididae: Orthoptera) is polymorphic for a centric fusion between pairs 3 and 6 of its basic chromosomal complement. With the aim of carrying out an analysis of selection components in this species, male mating success, in relation to karyotype and three morphometric traits, was...
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2001
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v87_n4_p480_Colombo http://hdl.handle.net/20.500.12110/paper_0018067X_v87_n4_p480_Colombo |
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paper:paper_0018067X_v87_n4_p480_Colombo2023-06-08T14:39:27Z Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) Centric fusion Leptysma argentina Morphometric variables Orthoptera Sexual selection morphology polymorphism reproductive success sexual selection Acrididae Leptysma argentina Orthoptera animal article body constitution chromosome cross breeding female femur genetic polymorphism genetics genotype histology karyotyping male metaphase Orthoptera sexual behavior sexual development thorax Animal Body Constitution Chromosomes Crosses, Genetic Female Femur Genotype Karyotyping Male Metaphase Orthoptera Polymorphism (Genetics) Sex Behavior, Animal Sex Characteristics Support, Non-U.S. Gov't Thorax Leptysma argentina (Acrididae: Orthoptera) is polymorphic for a centric fusion between pairs 3 and 6 of its basic chromosomal complement. With the aim of carrying out an analysis of selection components in this species, male mating success, in relation to karyotype and three morphometric traits, was assessed by using experimental contests with four males and one female per mating cage. Karyotype was assessed in terms of fused chromosome 3/6 dosage and coded as '0', '1' and '2' for unfused homozygotes, heterozygotes and fusion homozygotes, respectively. The individual ANOVA showed significant differences between 'successful' and 'unsuccessful' males in all four measured characters. Fusion carriers showed a higher relative fitness. Since the phenotypic correlations among traits were significant, the selective effects were assessed by means of a multivariate analysis, which demonstrated that selection acted significantly on femur length only, selection on karyotype being indirect. Given that the fusion frequency has been constant since 1985, the presence of selective trade-offs cannot be ruled out. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v87_n4_p480_Colombo http://hdl.handle.net/20.500.12110/paper_0018067X_v87_n4_p480_Colombo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Centric fusion Leptysma argentina Morphometric variables Orthoptera Sexual selection morphology polymorphism reproductive success sexual selection Acrididae Leptysma argentina Orthoptera animal article body constitution chromosome cross breeding female femur genetic polymorphism genetics genotype histology karyotyping male metaphase Orthoptera sexual behavior sexual development thorax Animal Body Constitution Chromosomes Crosses, Genetic Female Femur Genotype Karyotyping Male Metaphase Orthoptera Polymorphism (Genetics) Sex Behavior, Animal Sex Characteristics Support, Non-U.S. Gov't Thorax |
| spellingShingle |
Centric fusion Leptysma argentina Morphometric variables Orthoptera Sexual selection morphology polymorphism reproductive success sexual selection Acrididae Leptysma argentina Orthoptera animal article body constitution chromosome cross breeding female femur genetic polymorphism genetics genotype histology karyotyping male metaphase Orthoptera sexual behavior sexual development thorax Animal Body Constitution Chromosomes Crosses, Genetic Female Femur Genotype Karyotyping Male Metaphase Orthoptera Polymorphism (Genetics) Sex Behavior, Animal Sex Characteristics Support, Non-U.S. Gov't Thorax Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) |
| topic_facet |
Centric fusion Leptysma argentina Morphometric variables Orthoptera Sexual selection morphology polymorphism reproductive success sexual selection Acrididae Leptysma argentina Orthoptera animal article body constitution chromosome cross breeding female femur genetic polymorphism genetics genotype histology karyotyping male metaphase Orthoptera sexual behavior sexual development thorax Animal Body Constitution Chromosomes Crosses, Genetic Female Femur Genotype Karyotyping Male Metaphase Orthoptera Polymorphism (Genetics) Sex Behavior, Animal Sex Characteristics Support, Non-U.S. Gov't Thorax |
| description |
Leptysma argentina (Acrididae: Orthoptera) is polymorphic for a centric fusion between pairs 3 and 6 of its basic chromosomal complement. With the aim of carrying out an analysis of selection components in this species, male mating success, in relation to karyotype and three morphometric traits, was assessed by using experimental contests with four males and one female per mating cage. Karyotype was assessed in terms of fused chromosome 3/6 dosage and coded as '0', '1' and '2' for unfused homozygotes, heterozygotes and fusion homozygotes, respectively. The individual ANOVA showed significant differences between 'successful' and 'unsuccessful' males in all four measured characters. Fusion carriers showed a higher relative fitness. Since the phenotypic correlations among traits were significant, the selective effects were assessed by means of a multivariate analysis, which demonstrated that selection acted significantly on femur length only, selection on karyotype being indirect. Given that the fusion frequency has been constant since 1985, the presence of selective trade-offs cannot be ruled out. |
| title |
Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) |
| title_short |
Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) |
| title_full |
Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) |
| title_fullStr |
Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) |
| title_full_unstemmed |
Chromosomal polymorphism, morphological traits and male mating success in Leptysma argentina (Orthoptera) |
| title_sort |
chromosomal polymorphism, morphological traits and male mating success in leptysma argentina (orthoptera) |
| publishDate |
2001 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v87_n4_p480_Colombo http://hdl.handle.net/20.500.12110/paper_0018067X_v87_n4_p480_Colombo |
| _version_ |
1768543403676532736 |