Data/hora: 21/06/2024 05:49:51

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Tipo da produção científica: | Resumo em Anais de Congresso
Data corrente: | 25/09/2008
Data da última atualização: | 03/02/2009
Autoria: | ALVES, A.; MENDES, R.; CARVALHO, P. C. de; COSTA, I.; DITA, M.; FARIAS, A.; SILVA, A.; TAVARES FILHO, L.; LEDO, C.; FREGENE, M.
Afiliação: | Alfredo Augusto Cunha Alves, CNPMF; Rui Mendes, CENARGEN; Paulo Cézar de Carvalho, UFRB; Ivo Costa; Miguel Angel Dita, CNPMF; Alba Rejane Nunes Farias, CNPMF; Alineaurea Silva, CPATSA; Leônidas Tavares Filho, FAPESB; Carlos Alberto da Silva Ledo, CNPMF; Martin Fregene, CIAT.
Título: | Cassava wild relatives utilisation at Embrapa.
Ano de publicação: | 2008
Fonte/Imprenta: | In: CGIAR GENERATION CHALLENGE PROGRAMME ANNUAL RESEARCH MEETING, 2008, Bangkok, Thailand. Poster abstracts... México, DF: Generation Challenge Programme, 2008. p. 52.
Idioma: | Inglês
Conteúdo: | A collection of Manihot species has been field established at Embrapa/CNPMF, obtained from different sources: 1) wild accessions from CENARGEN and other institutons; and 2) collection expeditions accomplished in semi-arid ("caating") and savanna ("cerrado") ecosystems. Currently, the collection has around 920 accessions of 18 cassava wild relatives. The crossing compatibility was assessed in crosses involving cultivars of M. esculenta and accessions of 13 wild species: M. anomala, M. flabellifolia, M. jacobinensis, M. peruvianna, M. tomentosa, 'Pornúncia', M. caerulescens, M. cecropiaefolia, M. dichotoma, M. glaziovii, M. irwinii, 'Maniçoba' and cassava 'Sete Anos'. The average rates of fertilised flowers, fruit set, and seed production were significantly different among species and dependent of both donor and receptor of the pollen grains. A total of 158 hybrid seeds were produced from 972 pollinated flowers. Interspecific hybrids between elite cassava varieties and M. tristis. For rust, higher numbers of resistant hybrids had M. flabellifolia or M. peruviana as parent. Resistance to cassava mealybugs and green mites were found in hybrids of M. flabellifolia.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)