Data/hora: 01/06/2024 22:27:17

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 07/04/2021
Data da última atualização: | 07/04/2021
Autoria: | SADER, M.; VAIO, M.; SANTOS, L. A. C.; DORNELAS, M. C.; VIEIRA, M. L. C.; MELO, N. F. de; PEDROSA-HARAND, A.
Afiliação: | MARIELA SADER; MAGDALENA VAIO; LUIZ AUGUSTO CAUZ SANTOS; MARCELO CARNIER DORNELAS; MARIA LUCIA CARNEIRO VIEIRA; NATONIEL FRANKLIN DE MELO, CPATSA; ANDREA PEDROSA-HARAND.
Título: | Large vs small genomes in Passifora: the infuence of the mobilome and the satellitome.
Ano de publicação: | 2021
Fonte/Imprenta: | Planta, v. 253, n. 4, 2021.
DOI: | https://doi.org/10.1007/s00425-021-03598-0
Idioma: | Inglês
Conteúdo: | Repetitive sequences are ubiquitous and fast-evolving elements responsible for size variation and large-scale organization of plant genomes. Within Passifora genus, a tenfold variation in genome size, not attributed to polyploidy, is known. Here, we applied a combined in silico and cytological approach to study the organization and diversifcation of repetitive elements in three species of this genus representing its known range in genome size variation. Sequences were classifed in terms of type and repetitiveness and the most abundant were mapped to chromosomes. We identifed long terminal repeat (LTR) retrotransposons as the most abundant elements in the three genomes, showing a considerable variation among species. Satellite DNAs (satDNAs) were less representative, but highly diverse between subgenera. Our results clearly confrm that the largest genome species (Passifora quadrangularis) presents a higher accumulation of repetitive DNA sequences, specially Angela and Tekay elements, making up most of its genome. Passifora cincinnata, with intermediate genome and from the same subgenus, showed similarity with P. quadrangularis regarding the families of repetitive DNA sequences, but in diferent proportions. On the other hand, Passifora organensis, the smallest genome, from a diferent subgenus, presented greater diversity and the highest proportion of satDNA. Altogether, our data indicates that while large genomes evolved by an accumulation of retrotransposons, the smallest genome known for the genus has evolved by diversifcation of diferent repeat types, particularly satDNAs.
Palavras-Chave: | Escumação do genma; Evolução cromossmica; SatDNA.
Thesagro: | Genoma; Maracujá; Passiflora Edulis.
Thesaurus Nal: | Passion fruits; Retrotransposons.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (59509-1) - UPC - AP - DD -  -  -  - DIS