Hybrid Collapse Confirms the Specific Status of Triatoma bahiensis Sherlock and Serafim, 1967 (Hemiptera, Triatominae), an Endemic Species in Brazil
Hybrid Collapse Confirms the Specific Status of Triatoma bahiensis Sherlock and Serafim, 1967 (Hemiptera, Triatominae), an Endemic Species in Brazil
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DOI：
10.4269/ajtmh.17-0270
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发表时间：
2018-01-01
影响因子：
3.3
通讯作者：
Mendonca, Vagner Jose
中科院分区：
文献类型：
--
作者：
Chaboli Alevi, Kaio Cesar;Pinotti, Heloisa;Mendonca, Vagner Jose
据估计，全世界有600万至700万人感染克氏锥虫，这是主要由锥虫传播的恰加斯病的病原体。最近在巴西的巴伊亚州收集了巴伊亚锥口线虫，并使用不同的方法进行了重新验证。用于定义“好”生物物种的主要标准是生殖隔离，因此我们评估了T. bahiensis女性和Triatoma lenti男性可能的特点与杂交故障合子后隔离。所有分析的细胞呈现2n = 22的核型和一对单价常染色体。这种染色体行为代表了杂种的崩溃，并强调了T的特殊地位。bahiensis。因此，我们的特点是存在的混合崩溃现象的实验交叉，我们确认的特定状态T。bahiensis，从而有助于Triatominae分类。
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.