Chromosomal locations of U2 snDNA clusters in Megaleporinus, Leporinus and Schizodon (Characiformes: Anostomidae)

Autor(es)

Ponzio, Julia Chagas ^[1] ; Piscor, Diovani ^[1] ; Parise-Maltempi, Patricia Pasquali ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Biol, Lab Citogenet, Av 24A 1515, BR-13506900 Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOLOGIA; v. 73, n. 3, p. 295-298, MAR 2018.
• Citações Web of Science: 0

Resumo

The U small nuclear RNA (U snRNA) genes comprise a multigene family and are required for splicing of pre-mRNA. In this paper, we aimed to study the chromosomal location of the U2 snRNA gene in Megaleporinus, Leporinus and Schizodon species, which constitute interesting models for the study of repetitive DNA and genomic evolution in fish once the group comprises species with and without heteromorphic sex chromosomes. The all six species showed 2n = 54 chromosomes: Megaleporinus elongatus, Megaleporinus macrocephalus, Leporinus striatus, Leporinus friderici, Schizodon boreal and Schizodon isognathus. The U2 snDNA clusters were evident in only one medium-sized submetracentric pair in all analyzed species and this may represent a condition shared by Anostomidae family. (AU)

• Processo FAPESP: 10/51339-0 - Estudo de elementos repetitivos presentes no genoma de espécies da família Anostomidae (Pisces, Characiformes)
• Beneficiário: Patricia Pasquali Parise Maltempi
• Modalidade de apoio: Auxílio à Pesquisa - Regular