Data/hora: 31/05/2024 08:18:51

Biblioteca(s): | Embrapa Soja.
Data corrente: | 17/12/1992
Data da última atualização: | 13/08/2004
Autoria: | COLLINS, G. B.; TAYLOR, N. L.; DEVERNA, J. W.
Título: | In vitro approaches to interspecific hybridization and chromosome manipulation in crop plants.
Ano de publicação: | 1984
Fonte/Imprenta: | In: STADLER GENETICS SYMPOSIUM, 16., 1984, Missouri. Gene manipulation in plant improvement. New York : Plenum Press, 1984.
Páginas: | p. 323-383.
Idioma: | Inglês
Conteúdo: | The results obtained to date involving the use of in vitro methods to facilitate wide hybridization in plants are voluminous and impressive. The techniques of embryo culture, ovule culture, and in vitro pollination and fertilization represent an extension of the normal sexual hybridization process. Successes recorded in obtaining hybrids stem largely from circumventing prezygotic or postzygotic hybridization barriers. Numerous recent successful hybridizations were possible because of the development of improved tissue and cell culture systems for crop plants and attention given to genotypes used in hybridization attempts. Interspecific and intergeneric hybridization utilizing the process of protoplast fusion will bypass the limits set by all sexual methods. In addition to combining complete genomes from two different species through protoplast fusion, this system affords unique opportunities for creating novel cytoplasmic combinations, transfer on individual chromosomes, transfer of cytoplasmic organelles, manipulation of male sterility, and for single gene transfer. Some caution must be noted with regard to the extent of hybridization possible between distantly related species. Although practically no limit exists to the physical fusion of protoplasts from widely divergent species, the restrictions imposed by somatic incompatibility have not been adequately addressed. Regeneration of plants from the protoplast or single heterokaryon level is still a major hurdle for many important crop species before somatic ...
Palavras-Chave: | Hibridizacao; Plant; Soybean; Sunflower.
Thesagro: | Girassol; Melhoramento; Planta; Soja.
Thesaurus Nal: | breeding; hybridization.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (8266-1) - ADC - PL - -- - 631.53 - S777g -  - DIS