Hybrid Collapse Confirms the Specific Status of Triatoma bahiensis Sherlock and Serafim, 1967 (Hemiptera, Triatominae), an Endemic Species in Brazil

Author(s)

Chaboli Alevi, Kaio Cesar ^{[1, 2]} ; Pinotti, Heloisa ^{[3, 4]} ; de Araujo, Renato Freitas ^{[5, 6]} ; Vilela de Azeredo Oliveira, Maria Tercilia ^{[1, 2]} ; da Rosa, Joao Aristeu ^{[3, 4]} ; Mendonca, Vagner Jose ^{[7, 8]}

Affiliation

^[1] Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Biol, IBILCE, UNESP, Sao Paulo - Brazil

^[2] Univ Estadual Paulista, UNESP, IBILCE, Inst Biociencias Letras & Ciencias Exatas, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

^[3] Univ Estadual Paulista, FCFAR, UNESP, Dept Ciencias Biol, Fac Ciencias Farmaceut, Sao Paulo - Brazil

^[4] Univ Estadual Paulista, UNESP, FCFAR, Fac Ciencias Farmaceut, Rodovia Araraquara Jau Km 1, BR-14801902 Araraquara, SP - Brazil

^[5] Ctr Adm Bahia, Secretaria Estadual Saude Bahia SESAB, Div Entomol, Salvador, BA - Brazil

^[6] Secretaria Estadual Saude Bahia SESAB, Div Entomol, Ctr Adm Bahia, Ave Luis Viana Filho 400, BR-41745900 Salvador, BA - Brazil

^[7] Univ Fed Piaui, UFPI, Ctr Ciencias Saude, Dept Parasitol & Microbiol, Campus Minist Petronio Portella, Teresina, Piaui - Brazil

^[8] Univ Fed Piaui, UFPI, Ctr Ciencias Saude, Ave Univ Lado Imparlninga, BR-64049550 Teresina, PI - Brazil

• Document type: Journal article
• Source: American Journal of Tropical Medicine and Hygiene; v. 98, n. 2, p. 475-477, 2018.
• Web of Science Citations: 3

Abstract

Six to seven million people worldwide are estimated to be infected with Trypanosoma cruzi, the etiologic agent of Chagas disease transmitted mainly by triatomines. Triatoma bahiensis was recently collected in the Brazilian state of Bahia and revalidated using different approaches. The main criterion used to define a ``good{''} biological species is reproductive isolation, so we evaluated the cytogenetics of first-generation (F1) hybrids resulting from the experimental cross between T. bahiensis females and Triatoma lenti males to possibly characterize the postzygotic isolation associated with the hybrid breakdown. All cells analyzed presented a karyotype of 2n = 22 and a pair of univalent autosomes. This chromosome behavior represents hybrid collapse and underscores the specific status of T. bahiensis. Thus, we have characterized the presence of the hybrid collapse phenomenon in an experimental cross, and we confirm the specific status of T. bahiensis, thus contributing to the Triatominae taxonomy. (AU)

• FAPESP's process: 13/19764-0 - Cytotaxonomy and chromosomal evolution in Triatominae subfamily
• Grantee: Kaio Cesar Chaboli Alevi
• Support Opportunities: Scholarships in Brazil - Doctorate