Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae)
The epidemiological importance of Chagas disease vectors largely depends on their spreading ability and adaptation to domestic habitats. Triatoma patagonica is a secondary vector of Chagas disease endemic of Argentina, and it has been found colonizing domiciles and most commonly peridomiciliary stru...
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todo:paper_19326203_v11_n12_p_Nattero2023-10-03T16:34:40Z Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) Nattero, J. Pita, S. Calleros, L. Crocco, L. Panzera, Y. Rodríguez, C.S. Panzera, F. Article Chagas disease chromosome analysis controlled study cross breeding cytochrome c oxidase I mitochondrial gene DNA sequence genetic distance genetic variability heterochromatin insect vector mitochondrial gene morphological trait nonhuman phenotype population differentiation Triatoma Triatoma patagonica anatomy and histology animal animal dispersal Chagas disease genetic variation genetics physiology reproductive isolation transmission Triatoma wing Animal Distribution Animals Chagas Disease Genetic Variation Insect Vectors Phenotype Reproductive Isolation Sequence Analysis, DNA Triatoma Wings, Animal The epidemiological importance of Chagas disease vectors largely depends on their spreading ability and adaptation to domestic habitats. Triatoma patagonica is a secondary vector of Chagas disease endemic of Argentina, and it has been found colonizing domiciles and most commonly peridomiciliary structures in several Argentine provinces and morphological variation along its distribution range have been described. To asses if population differentiation represents geographic variants or true biological species, multiple genetic and phenotypic approaches and laboratory cross-breeding were performed in T. patagonica peridomestic populations. Analyses of chromatic variation of forewings, their size and the content of C-heterochromatin on chromosomes revealed that populations are structured following a North-South latitudinal variation. Cytochrome c oxidase I mitochondrial gene (COI) nucleotide analysis showed a mean genetic distance of 5.2% between the most distant populations. The cross-breeding experiments suggest a partial reproductive isolation between some populations with 40% of couples not laying eggs and low hatching efficiency. Our findings reveal phenotypic and genetic variations that suggest an incipient differentiation processes among T. patagonica populations with a pronounced phenotypic and genetic divergence between the most distant populations. The population differentiation here reported is probably related to differential environmental conditions and it could reflect the occurrence of an incipient speciation process in T. patagonica. © 2016 Nattero et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19326203_v11_n12_p_Nattero |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Article Chagas disease chromosome analysis controlled study cross breeding cytochrome c oxidase I mitochondrial gene DNA sequence genetic distance genetic variability heterochromatin insect vector mitochondrial gene morphological trait nonhuman phenotype population differentiation Triatoma Triatoma patagonica anatomy and histology animal animal dispersal Chagas disease genetic variation genetics physiology reproductive isolation transmission Triatoma wing Animal Distribution Animals Chagas Disease Genetic Variation Insect Vectors Phenotype Reproductive Isolation Sequence Analysis, DNA Triatoma Wings, Animal |
| spellingShingle |
Article Chagas disease chromosome analysis controlled study cross breeding cytochrome c oxidase I mitochondrial gene DNA sequence genetic distance genetic variability heterochromatin insect vector mitochondrial gene morphological trait nonhuman phenotype population differentiation Triatoma Triatoma patagonica anatomy and histology animal animal dispersal Chagas disease genetic variation genetics physiology reproductive isolation transmission Triatoma wing Animal Distribution Animals Chagas Disease Genetic Variation Insect Vectors Phenotype Reproductive Isolation Sequence Analysis, DNA Triatoma Wings, Animal Nattero, J. Pita, S. Calleros, L. Crocco, L. Panzera, Y. Rodríguez, C.S. Panzera, F. Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) |
| topic_facet |
Article Chagas disease chromosome analysis controlled study cross breeding cytochrome c oxidase I mitochondrial gene DNA sequence genetic distance genetic variability heterochromatin insect vector mitochondrial gene morphological trait nonhuman phenotype population differentiation Triatoma Triatoma patagonica anatomy and histology animal animal dispersal Chagas disease genetic variation genetics physiology reproductive isolation transmission Triatoma wing Animal Distribution Animals Chagas Disease Genetic Variation Insect Vectors Phenotype Reproductive Isolation Sequence Analysis, DNA Triatoma Wings, Animal |
| description |
The epidemiological importance of Chagas disease vectors largely depends on their spreading ability and adaptation to domestic habitats. Triatoma patagonica is a secondary vector of Chagas disease endemic of Argentina, and it has been found colonizing domiciles and most commonly peridomiciliary structures in several Argentine provinces and morphological variation along its distribution range have been described. To asses if population differentiation represents geographic variants or true biological species, multiple genetic and phenotypic approaches and laboratory cross-breeding were performed in T. patagonica peridomestic populations. Analyses of chromatic variation of forewings, their size and the content of C-heterochromatin on chromosomes revealed that populations are structured following a North-South latitudinal variation. Cytochrome c oxidase I mitochondrial gene (COI) nucleotide analysis showed a mean genetic distance of 5.2% between the most distant populations. The cross-breeding experiments suggest a partial reproductive isolation between some populations with 40% of couples not laying eggs and low hatching efficiency. Our findings reveal phenotypic and genetic variations that suggest an incipient differentiation processes among T. patagonica populations with a pronounced phenotypic and genetic divergence between the most distant populations. The population differentiation here reported is probably related to differential environmental conditions and it could reflect the occurrence of an incipient speciation process in T. patagonica. © 2016 Nattero et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| format |
JOUR |
| author |
Nattero, J. Pita, S. Calleros, L. Crocco, L. Panzera, Y. Rodríguez, C.S. Panzera, F. |
| author_facet |
Nattero, J. Pita, S. Calleros, L. Crocco, L. Panzera, Y. Rodríguez, C.S. Panzera, F. |
| author_sort |
Nattero, J. |
| title |
Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) |
| title_short |
Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) |
| title_full |
Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) |
| title_fullStr |
Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) |
| title_full_unstemmed |
Morphological and genetic differentiation within the southernmost vector of chagas disease: Triatoma patagonica (hemiptera-reduviidae) |
| title_sort |
morphological and genetic differentiation within the southernmost vector of chagas disease: triatoma patagonica (hemiptera-reduviidae) |
| url |
http://hdl.handle.net/20.500.12110/paper_19326203_v11_n12_p_Nattero |
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