Data/hora: 08/06/2024 10:47:58

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 30/12/2019
Data da última atualização: | 06/02/2024
Autoria: | MORAES, I. DE C.; RUME, G. DE C.; SOUZA SOBRINHO, F. de; TECHIO, V. H.
Afiliação: | ISABELLA DE CAMPOS MORAES; GABRIEL DE CAMPOS RUME; FAUSTO DE SOUZA SOBRINHO, CNPGL; VÂNIA HELENA TECHIO.
Título: | Characterization of aneuploidy in interspecific hybrid between Urochloa ruziziensis (R. Germ. & Evrard) Crins and Urochloa decumbens (Stapf) R. D. Webster.
Ano de publicação: | 2019
Fonte/Imprenta: | Molecular Biology Reports, v. 46, n. 2, p. 1931-1940, 2019.
DOI: | https://doi.org/10.1007/s11033-019-04643-8
Idioma: | Inglês
Conteúdo: | The aim of the study was to characterize the type of aneuploidy present in the hybrid Urochloa ruziziensis × Urochloa decumbens and to confirm the origin of the additional chromosomes through comparative analysis of the hybrid and parental karyotypes. C and CMA banding techniques were used for chromosome differentiation. The parental genotypes showed 36 chromosomes. The hybrid presented plants with 36 + 2 chromosomes and plants with 36 + 1 chromosomes. Urochloa ruziziensis (4x) presented four chromosomes with CMA and C bands co-located in the terminal position. In U. decumbens, four chromosomes presented terminal CMA bands, eight chromosomes were distinguished by C banding with pericentromeric and terminal bands, one chromosome with terminal band at both ends and one chromosome presented one C terminal band. For the hybrid, CMA bands were found on five chromosomes and C bands on seven chromosomes, all in terminal position. Aneuploidy was identified in pairs 3' and 4' in the hybrid plants with 36 + 2 chromosomes, characterizing it as double trisomy. The karyotype of hybrid plants with 36 + 1 chromosomes indicated elimination of the additional chromosome identified in pair 4' and maintenance of trisomy on pair 3'. The comparative analysis of karyotypes indicates that the additional chromosomes that characterize the trisomy were inherited from U. ruziziensis (artificial tetraploid).
Palavras-Chave: | Karyotype; Trisomy.
Thesagro: | Brachiaria.
Thesaurus Nal: | Chromosome banding.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (24915-1) - UPC - AP - DD -  -  -  - DIS