The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii
Inversion polymorphisms often have been associated with fitness variation. Cactophilic Drosophila buzzatii has been used widely for the study of the maintenance of chromosomal variation. The purpose of this paper is to address the relative importance of variable selection regimes associated with the...
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2000
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v54_n4_p1295_Iriarte http://hdl.handle.net/20.500.12110/paper_00143820_v54_n4_p1295_Iriarte |
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paper:paper_00143820_v54_n4_p1295_Iriarte2023-06-08T14:37:00Z The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii Hasson, Esteban Ruben Antagonistic pleiotropy Cactus hosts Drosophila Inversion polymorphism Life-history traits chromosome gene rearrangement genetic polymorphism genetic variance homozygosity inversion polymorphism phylogeny pleiotropy evolution host use polymorphism Drosophila buzzatii Inversion polymorphisms often have been associated with fitness variation. Cactophilic Drosophila buzzatii has been used widely for the study of the maintenance of chromosomal variation. The purpose of this paper is to address the relative importance of variable selection regimes associated with the use of three different host cacti and antagonistic pleiotropy in the maintenance of chromosomal variation. Using homokaryotypic stocks derived from several lines homozygous for four second-chromosome arrangements, we show that inversions significantly affect first-instar larva to adult viability (VT), developmental time (DT) and adult thorax length (TL). We also show that the effects of inversions on DT and VT are dependent on the cactus rearing media. The effects of polymorphic gene arrangements on life-history traits suggest the existence of trade-offs between early and late fitness components. The dosage of arrangement 2st, the ancestral gene order, was negatively correlated with DT and TL, whereas flies carrying the derived arrangements 2j and 2jq7 had longer DTs and larger TLs. Arrangements 2st and 2jq7 increased viability, at least in one of the cactus media tested. Our results suggest that environmental heterogeneity, as represented by the use of different cactus hosts and the trade-off between DT and TL, may be involved in the maintenance of the polymorphism. In addition, our data suggest that the chromosomal phylogeny may be decoupled from the evolution of the genes affecting life-history traits linked to the inversion system. Fil:Hasson, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v54_n4_p1295_Iriarte http://hdl.handle.net/20.500.12110/paper_00143820_v54_n4_p1295_Iriarte |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Antagonistic pleiotropy Cactus hosts Drosophila Inversion polymorphism Life-history traits chromosome gene rearrangement genetic polymorphism genetic variance homozygosity inversion polymorphism phylogeny pleiotropy evolution host use polymorphism Drosophila buzzatii |
| spellingShingle |
Antagonistic pleiotropy Cactus hosts Drosophila Inversion polymorphism Life-history traits chromosome gene rearrangement genetic polymorphism genetic variance homozygosity inversion polymorphism phylogeny pleiotropy evolution host use polymorphism Drosophila buzzatii Hasson, Esteban Ruben The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii |
| topic_facet |
Antagonistic pleiotropy Cactus hosts Drosophila Inversion polymorphism Life-history traits chromosome gene rearrangement genetic polymorphism genetic variance homozygosity inversion polymorphism phylogeny pleiotropy evolution host use polymorphism Drosophila buzzatii |
| description |
Inversion polymorphisms often have been associated with fitness variation. Cactophilic Drosophila buzzatii has been used widely for the study of the maintenance of chromosomal variation. The purpose of this paper is to address the relative importance of variable selection regimes associated with the use of three different host cacti and antagonistic pleiotropy in the maintenance of chromosomal variation. Using homokaryotypic stocks derived from several lines homozygous for four second-chromosome arrangements, we show that inversions significantly affect first-instar larva to adult viability (VT), developmental time (DT) and adult thorax length (TL). We also show that the effects of inversions on DT and VT are dependent on the cactus rearing media. The effects of polymorphic gene arrangements on life-history traits suggest the existence of trade-offs between early and late fitness components. The dosage of arrangement 2st, the ancestral gene order, was negatively correlated with DT and TL, whereas flies carrying the derived arrangements 2j and 2jq7 had longer DTs and larger TLs. Arrangements 2st and 2jq7 increased viability, at least in one of the cactus media tested. Our results suggest that environmental heterogeneity, as represented by the use of different cactus hosts and the trade-off between DT and TL, may be involved in the maintenance of the polymorphism. In addition, our data suggest that the chromosomal phylogeny may be decoupled from the evolution of the genes affecting life-history traits linked to the inversion system. |
| author |
Hasson, Esteban Ruben |
| author_facet |
Hasson, Esteban Ruben |
| author_sort |
Hasson, Esteban Ruben |
| title |
The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii |
| title_short |
The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii |
| title_full |
The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii |
| title_fullStr |
The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii |
| title_full_unstemmed |
The role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic Drosophila buzzatii |
| title_sort |
role of the use of different host plants in the maintenance of the inversion polymorphism in the cactophilic drosophila buzzatii |
| publishDate |
2000 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00143820_v54_n4_p1295_Iriarte http://hdl.handle.net/20.500.12110/paper_00143820_v54_n4_p1295_Iriarte |
| work_keys_str_mv |
AT hassonestebanruben theroleoftheuseofdifferenthostplantsinthemaintenanceoftheinversionpolymorphisminthecactophilicdrosophilabuzzatii AT hassonestebanruben roleoftheuseofdifferenthostplantsinthemaintenanceoftheinversionpolymorphisminthecactophilicdrosophilabuzzatii |
| _version_ |
1768545956621451264 |