Data/hora: 21/06/2024 01:19:43

Biblioteca(s): | Embrapa Gado de Corte.
Data corrente: | 19/06/1998
Data da última atualização: | 11/07/2007
Autoria: | GROF, B.; FERNANDES, C. D.; ALMEIDA, C. B.; SANTOS, A. V. dos.
Afiliação: | EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS).
Título: | Development of a multicross cultivar of Stylosanthes spp.
Ano de publicação: | 1997
Fonte/Imprenta: | In: INTERNATIONAL GRASSLAND CONGRESS, 18., 1997, Winnipeg, Saskatoon. Proceedings... [S.l.: s.n., 1997?].
Páginas: | p. 4-31 / 4-32.
Idioma: | Inglês
Notas: | CNPGC.
Conteúdo: | A synthetic population,refered to as multicross, has been developed from an interspecific mixture of Stylosanthes capitata and S.macrocephala germplasm. This basic population evolved in a farming situation subject to uncontrolled, continuous, heavy grazing. Natural selection and systematically programmed intercrossing among anthracnose-resistant Venezuelan and Brazilian genotypes of S.capitata have played major roles in the subsequent development of this heterogeneous population. Eight anthracnose-resistant Venezuelan and two Brazilian accessions of S.capitata were introgressed into the basic population. Genetic diversity was further increased by adding seed of four selected accessions of S. macrocephala to the synthetic which had already included three accessions from the basic population. The composite was advanced through five generations of bulk seed production to improve its stability, synchronise harvest maturity, and primarily to facilitate natural intercrossing among S.capitata genotypes. The multicross population displayed anthracnose-resistance in the presence of susceptible, infected accessions in field trials conducted over the years since its initial synthesis in 1990.
Palavras-Chave: | Anthracnosis; Brasil; Diseases resistance; Variedade resistante.
Thesagro: | Antracnose; Hibridação; Leguminosa; Leguminosae; Stylosanthes Macrocephala.
Thesaurus Nal: | Brazil; hybridization; Stylosanthes capitata; Venezuela.
Categoria do assunto: | --
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (3655-1) - UPC - PL - -- - 633.2 - I61p - 1998.00021 - DIS