Genovez-Oliveira Jhon Lennon, Oliveira Mariana de Souza, Thode-Filho Sergio, Cardozo Sergian Vianna, Oliveira Águida Aparecida de, Lima Viviane Moreira de, Ferreira Ildemar, Berto Bruno Pereira
Programa de Pós-Graduação em Biologia Animal, Instituto de Ciências Biológicas e da Saúde (ICBS), Universidade Federal Rural do Rio de Janeiro (UFRRJ), BR-465 km 7, 23897-000 Seropédica, RJ, Brazil.
Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Avenida República do Paraguai 120, 25050-100 Duque de Caxias, RJ, Brazil; Programa de Pós-graduação em Ciência, Tecnologia e Inovação em Agropecuária, UFRRJ, BR-465 km 7, 23897-000 Seropédica, RJ, Brazil.
Parasitol Int. 2020 Apr;75:102040. doi: 10.1016/j.parint.2019.102040. Epub 2019 Dec 13.
In the current work, Isospora massardi Lopes, Berto, Luz, Galvão, Ferreira & Lopes, [10] is identified from white-necked thrushes Turdus albicollis Vieillot, 1818, rufous-bellied thrushes Turdus rufiventris Vieillot, 1818 and from a new host, the yellow-legged thrush Turdus flavipes (Vieillot, 1818) in a new locality, the Itatiaia National Park, in Southeastern Brazil, providing a preliminary genotypic characterization via sequencing of the mitochondrial cytochrome c oxidase subunit 1 (COI) and 18S small subunit ribosomal RNA genes. The oocysts and sporocysts of I. massardi of the current study are morphologically similar to the original description and are uniform in the proportionality of width on length, but exhibited different patterns of size associated with each host species. Furthermore, a genotypic difference of 3% was found in the COI sequences from T. flavipes and T. albicollis. Therefore, an ecological discussion is introduced aimed at associating these morphometric and genotypic differences with an ongoing speciation process.
在当前研究中，从白颈鸫（Turdus albicollis Vieillot，1818）、棕腹鸫（Turdus rufiventris Vieillot，1818）以及巴西东南部伊塔伊亚国家公园这一新地点的新宿主黄腿鸫（Turdus flavipes (Vieillot, 1818)）中鉴定出了马萨尔迪等孢球虫（Isospora massardi Lopes, Berto, Luz, Galvão, Ferreira & Lopes, [10]），并通过对线粒体细胞色素c氧化酶亚基1（COI）和18S小亚基核糖体RNA基因进行测序，提供了初步的基因型特征描述。本研究中的马萨尔迪等孢球虫的卵囊和孢子囊在形态上与最初描述相似，长宽比例一致，但与每个宿主物种相关的大小模式不同。此外，在黄腿鸫和白颈鸫的COI序列中发现了3%的基因型差异。因此，引入了一场生态讨论，旨在将这些形态测量和基因型差异与正在进行的物种形成过程联系起来。
