Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala
Triatoma dimidiata is one of the major vectors of Chagas disease in Latin America. Its range includes Mexico, all countries of Central America, Colombia, and Ecuador. In light of recent genetic analysis suggesting that the possible origin of this species is the Yucatan peninsula, we have analyzed po...
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Instituto Oswaldo Cruz, Ministério da Saúde
2005-08-01
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doaj-f8a21109cad645f583720d53100590422020-11-24T23:52:49ZengInstituto Oswaldo Cruz, Ministério da SaúdeMemórias do Instituto Oswaldo Cruz.0074-02761678-80602005-08-01100547748610.1590/S0074-02762005000500006Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern GuatemalaP LehmannR OrdoñezR Ojeda-BarandaJ Mendez de LiraL Hidalgo-SosaC MonroyJM RamseyTriatoma dimidiata is one of the major vectors of Chagas disease in Latin America. Its range includes Mexico, all countries of Central America, Colombia, and Ecuador. In light of recent genetic analysis suggesting that the possible origin of this species is the Yucatan peninsula, we have analyzed populations from the state of Yucatan, San Luis Potosi, and Veracruz in Mexico, and a population from the southern region of the Yucatan peninsula located in Northern Guatemala, the region of El Peten. Classical morphometry including principal component, discriminant, sexual dimorphism, and wing asymmetry was analyzed. San Luis Potosi and Veracruz populations were indistinguishable while clearly separate from Yucatan and Peten populations. Despite important genetic differences, Yucatan and Peten populations were highly similar. Yucatan specimens were the smallest in size, while females were larger than males in all populations. Only head characters were necessary to distinguish population level differences, although wing fluctuating asymmetry was present in all populations. These results are discussed in light of recent findings suggesting genetic polymorphism in most populations of Triatoma dimidiata south of Chiapas to Ecuador.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762005000500006Triatoma dimidiataChagas diseasemorphometryMexicoGuatemala |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
P Lehmann R Ordoñez R Ojeda-Baranda J Mendez de Lira L Hidalgo-Sosa C Monroy JM Ramsey |
spellingShingle |
P Lehmann R Ordoñez R Ojeda-Baranda J Mendez de Lira L Hidalgo-Sosa C Monroy JM Ramsey Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala Memórias do Instituto Oswaldo Cruz. Triatoma dimidiata Chagas disease morphometry Mexico Guatemala |
author_facet |
P Lehmann R Ordoñez R Ojeda-Baranda J Mendez de Lira L Hidalgo-Sosa C Monroy JM Ramsey |
author_sort |
P Lehmann |
title |
Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala |
title_short |
Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala |
title_full |
Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala |
title_fullStr |
Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala |
title_full_unstemmed |
Morphometric analysis of Triatoma dimidiata populations (Reduviidae:Triatominae) from Mexico and Northern Guatemala |
title_sort |
morphometric analysis of triatoma dimidiata populations (reduviidae:triatominae) from mexico and northern guatemala |
publisher |
Instituto Oswaldo Cruz, Ministério da Saúde |
series |
Memórias do Instituto Oswaldo Cruz. |
issn |
0074-0276 1678-8060 |
publishDate |
2005-08-01 |
description |
Triatoma dimidiata is one of the major vectors of Chagas disease in Latin America. Its range includes Mexico, all countries of Central America, Colombia, and Ecuador. In light of recent genetic analysis suggesting that the possible origin of this species is the Yucatan peninsula, we have analyzed populations from the state of Yucatan, San Luis Potosi, and Veracruz in Mexico, and a population from the southern region of the Yucatan peninsula located in Northern Guatemala, the region of El Peten. Classical morphometry including principal component, discriminant, sexual dimorphism, and wing asymmetry was analyzed. San Luis Potosi and Veracruz populations were indistinguishable while clearly separate from Yucatan and Peten populations. Despite important genetic differences, Yucatan and Peten populations were highly similar. Yucatan specimens were the smallest in size, while females were larger than males in all populations. Only head characters were necessary to distinguish population level differences, although wing fluctuating asymmetry was present in all populations. These results are discussed in light of recent findings suggesting genetic polymorphism in most populations of Triatoma dimidiata south of Chiapas to Ecuador. |
topic |
Triatoma dimidiata Chagas disease morphometry Mexico Guatemala |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762005000500006 |
work_keys_str_mv |
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