Data/hora: 08/06/2024 05:52:20

Biblioteca(s): | Embrapa Gado de Corte.
Data corrente: | 21/02/2006
Data da última atualização: | 10/03/2008
Autoria: | GROF, B.; FERNANDES, C. D.; FERNANDES, A. T. F.
Título: | A novel technique to produce polygenic resistance to anthracnose in Stylosanthes capitata.
Ano de publicação: | 2001
Fonte/Imprenta: | In: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, São Pedro. Grassland ecosystems: an outlook into the 21st century: proceedings. Piracicaba: Sociedade Brasileira de Zootecnia: FEALQ, 2001.
Páginas: | p. 525-526. (ID n. 13-01)
Idioma: | Inglês
Notas: | CNPGC.
Conteúdo: | An improved cultivar, based on17 genotypes of S.cpitata and six of S.macrocephala, was developed at the Embrapa Beef Cattle Research Center. Campo Grande, Brazil. The aim was o create durable, race non-spedific resistance to anthracnose controlled by polygenic factors. A mass hybridisation technique was employed to produce a higth degree of genetic diversity and sizeable quantities of seed of hybriderived progenies of Brazilian and Venezuelan genotypes of S.capitata. Outcrossing resulted in a significant improvement in the forage production of progeny of Venezuelan accessions. The multicross was evaluated in multilocational trials, each representing a large tract of country  in the Cerradis ecosystem along  a north-south transect from lat 6 to 20 S. The genetic shift that accourred in  S. capitata was a key element in the formation of the new cultivar. It is a complex mixture of two especies, and a reombination of murch desired forage tratis of Brazilian x Venezuelan genotypes, high forage and seed yields coupled eith anthracnose resistance. The new cultivar with its diverse genetic make up has  a wide application in the acid-soil savannas of tropical America. It was released by Embrapa for the Cerrados in 2000.
Thesagro: | Antracnose; Cerrado; Hibridação; Variedade Resistente.
Thesaurus Nal: | anthracnose; genetic variation; hybridization; savannas; Stylosanthes capitata.
Categoria do assunto: | --
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (11096-1) - UPC - PL - -- - 633.2 - I61p -  - DIS