Data/hora: 03/06/2024 18:19:44

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 29/10/2021
Data da última atualização: | 14/06/2022
Autoria: | CHAVES, A. L. A.; CARVALHO, P. H. M.; FERREIRA, M. T. M.; BENITES, F. R. G.; TECHIO, V. H.
Afiliação: | ANA LUISA ARANTES CHAVES, Universidade Federal de Lavras; PEDRO HENRIQUE MENDES CARVALHO, Universidade Federal de Lavras; MARCO TULIO MENDES FERREIRA, Universidade Federal de Lavras; FLAVIO RODRIGO GANDOLFI BENITES, CNPGL; VÂNIA HELENA TECHIO, Universidade Federal de Lavras.
Título: | Genomic constitution, allopolyploidy, and evolutionary proposal for Cynodon Rich. based on GISH.
Ano de publicação: | 2021
Fonte/Imprenta: | Protoplasma, v. 259, p. 999-1011, 2022.
DOI: | https://doi.org/10.1007/s00709-021-01716-z
Idioma: | Inglês
Conteúdo: | Polyploidy is the main mechanism for chromosome number variation in Cynodon. Taxonomic boundaries are difcult to defne and, although phylogenetic studies indicate that some species are closely related, the degree of genomic similarity remains unknown. Furthermore, the Cynodon species classifcation as auto or allopolyploids is still controversial. Thus, this study aimed to investigate the genomic constitution in diploid and polyploid species using diferent approaches of genomic in situ hybridization (GISH). To better understand the hybridization events, we also investigated the occurrence of unreduced gametes in C. dactylon diploid pollen grains. We suggest a genomic nomenclature of diploid species as DD, D1 D1 , and D2 D2 for C. dactylon, C. incompletus, and C. nlemfuensis, and DDD2 D2 and DD2 D1 D1 for the segmental allotetraploids of Cynodon dactylon and C. transvaalensis, respectively. Furthermore, an evolutionary proposal was built based on our results and previous data from other studies, showing possible crosses that may have occurred between Cynodon species.
Palavras-Chave: | Análise genômica; Citótipo; Evolutionary history; Gameta não reduzido; Genomic analysis; História evolutiva; Unreduced gametes.
Thesagro: | Hibrido; Poliploidia.
Thesaurus Nal: | Cytotypes; Hybrids; Polyploidy.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (25454-1) - UPC - AP - DD -  -  -  - DIS