Data/hora: 04/06/2024 17:22:32

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 21/01/2015
Data da última atualização: | 05/02/2024
Autoria: | PEREIRA, R. C.; FERREIRA, M. T. M.; DAVIDE, L. C.; PASQUAL, M.; MITTELMANN, A.; TECHIO, V. H.
Afiliação: | ROSELAINE C. PEREIRA, UFLA; MARCO TULIO M. FERREIRA, UFLA; LISETE CHAMMA DAVIDE, UFLA; MOACIR PASQUAL, UFLA; ANDREA MITTELMANN, CNPGL; VANIA H. TECHIO, UFLA.
Título: | Chromosome duplication in Lolium multiflorum Lam.
Ano de publicação: | 2014
Fonte/Imprenta: | Crop Breeding and Applied Biotechnology, v. 14, p. 251-255, 2014.
Idioma: | Inglês
Conteúdo: | Artificial chromosome duplication of diploid genotypes of Lolium multiflorum (2n=2x=14) is worthy to breeding, and aims to increase the expression of traits with agronomic interest. The purpose of this study was to obtain polyploid plants of L. multiflorum from local diploid populations in order to exploit adaptation and future verification of the effects of polyploidy in agronomic traits. Seedlings were immersed in different colchicine solutions for an exposure time of 3h and 24h. Ploidy determination was made by the DNA content and certified by chromosomes counts. The plants confirmed as tetraploids were placed in a greenhouse, and, at flowering, pollen viability was evaluated, and seeds were harvested to assess the stability of the progenies. The percentage of polyploids obtained was 20%. Pollen viability of the tetraploids generated ranged from 58% to 69%. The tetraploid plants obtained in the experiment generated 164 progenies, of which 109 presented DNA content compatible with the tetraploid level, showing stability of chromosome duplication in the filial generation.
Palavras-Chave: | Forage grass; Polyploidization; Tetraploid.
Thesaurus Nal: | plant breeding.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/116182/1/Artigo-Andrea-Crop-BrApBiotech-Chromosome.pdf
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (21612-1) - UPC - AP - DD -  -  -  - DIS