Speciation

Intraspecific and interspecific polyploidy of Brazilian species of the genus Inga (Leguminosae: Mimosoideae)

M. F. Figueiredo, Bruno, R. L. A., Silva, A. E. Barros e, Nascimento, S., Oliveira, I. G., and Felix, L. P., Intraspecific and interspecific polyploidy of Brazilian species of the genus Inga (Leguminosae: Mimosoideae), vol. 13, pp. 3395-3403, 2014.

We investigated the karyotypes of 13 species of six sections of the genus Inga (Leguminosae-Mimosoideae) from Brazil. We used conventional Giemsa staining to identify numerical chromosomal variations and looked for karyotypic evolutionary patterns. The karyotypes generally had small chromosomes, varying from metacentric to submetacentric, with a basic number x = 13. Nine of the species showed 2n = 2x = 26 (I. thibaudiana, I. cayennensis, I. ingoides, I. edulis, I. vera, I. subnuda, I. striata, I.

New microsatellite markers for the neotropical malaria vector Anopheles nuneztovari sensu lato

A. S. Cunha-Machado and Scarpassa, V. M., New microsatellite markers for the neotropical malaria vector Anopheles nuneztovari sensu lato, vol. 13, pp. 8856-8861, 2014.

Anopheles nuneztovari sensu lato consists of cryptic species and genetic lineages, one of which is an important human malaria vector in the northern part of South America. Population structure and evolutionary genetics studies may help in the definition and delimitation of the species and lineages within this species complex, which is relevant information for organizations involved in malaria control efforts. In this study, 10 new microsatellite markers were isolated from 2 repeat-enriched genomic libraries of A. nuneztovari s.l.

Evolution by polyploidy and gene regulation in Anura

M. Luiza Beçak and Kobashi, L. Setsuo, Evolution by polyploidy and gene regulation in Anura, vol. 3, pp. 195-212, 2004.

The evolution of the metazoa has been characterized by gene redundancy, generated by polyploidy, tandem duplication and retrotransposition. Polyploidy can be detected by looking for duplicated chromosomes or segments of orthologous chromosomes in post-polyploid animals. It has been proposed that the evolutionary role of polyploidy is to provide extra-copies of genes, whose subsequent alteration leads to new functions, increased biological complexity, and, ultimately, speciation.

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