Data/hora: 15/06/2024 07:42:33

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 30/11/2000
Data da última atualização: | 05/05/2016
Autoria: | ALLEM, A. C.; ROA, A. C.; MENDES, R. A.; SALOMAO, A. N.; BURLE, M. L.; SECOND, G.; CARVALHO, P. C. L. de; CAVALCANTI, J.
Afiliação: | JOSIAS CAVALCANTI, CPATSA.
Título: | The primary gene pool of cassava (Manihot esculenta Crantz).
Ano de publicação: | 2000
Fonte/Imprenta: | In: INTERNATIONAL SCIENTIFIC MEETING CASSAVA BIOTECHNOLOGY NETWORK, 4., 1998, Salvador. Cassava biotechnology: proceedings. Brasília, DF: EMBRAPA-CENARGEN: CBN, 2000.
Páginas: | P. 3-14.
ISBN: | 85-87697-05-6
Idioma: | Inglês
Conteúdo: | A crop gene pool comprises three distinct categories of gene suppliers, primary, secondary, and tertiary gene pools. The primary gene pool (GP-1) is composed of gene reservoirs that cross easily with the domesticate and the crosses produce fertile offspring regularly. The secondary (GP-2) and tertiary (GP-3) gene pools comprise gene sources that cross with variable degrees of diffilculty with the crop species, this implies less close genetic distances. The GP-1 is further subdivided in cultivated and wild gene pools. The cultivated gene pool englobes commercial stocks of the crop besides indigenous landraces and folk varieties of the domesticate. The wild GP-1 of a crop comprises putative ancestors and closely related species that show a fair degree of fertile relationships with the domesticate. Two Douth American wild subspecies of cassava (M. flabellifolia and M. peruviana) are natural members of the wild GP-1 of the species. Another Brazilian species (M. pruinosa) is so close morphologically to the two wild subspecies of cassava that it may turn out another member of the wild GP-1 of the indigen. The GP-2 of cassava is more difficult to delimit as few species have been tested for genetic compatibility. Biosystematic crosses carried out between the crop and a number of wild species suggest a dozen of them as components of the GP-2, the majority are Brazilian species.
Palavras-Chave: | Biotecnology.
Thesagro: | Biotecnologia; Espécie; Mandioca; Manihot Esculenta; Taxonomia.
Thesaurus Nal: | Cassava.
Categoria do assunto: | Q Alimentos e Nutrição Humana
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/142796/1/ID-8742-1.pdf
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (8742-1) - UPC - AA - PP - 633.682 - I61c -  - DIS