Data/hora: 22/06/2024 01:09:19

Biblioteca(s): | Embrapa Gado de Corte.
Data corrente: | 22/02/2006
Data da última atualização: | 10/03/2008
Autoria: | VALLE, C. B. do; EUCLIDES, V. P. B.; MACEDO, M. C. M.; VALÉRIO, J. R.; CALIXTO, S.
Afiliação: | Embrapa Gado de Corte (Campo Grande, MS).
Título: | Selecting new Brachiaria for brazilian pastures.
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. 536-537. (ID n. 13-14).
Idioma: | Inglês
Notas: | CNPGC.
Conteúdo: | Brazilian beef production relies heavily on cultivated pastures, of which about 80% are planted mainly to  two Brachiaria cultivars. The narrowness of diversity associated with reproduction by apomixis of most plants in this genus prompted an intense search for new cultivars amongst recently collected and introduced ecotypes from Africa. This paper reports results for a three-year evaluation of 21 pre-selected ecotypes in two typical Cerrado ecosystems. Plots, replicated four times, were selected in rows and cut every 6 weeks during the rainy season followed by a cut in the middle and one at the end of the dry season. Significant differences wee found between ecotypes,  seasons and years for total, leaf + stem dry matter production, percentage of leaves, leaf: sterm ratio and regrowth rate. Ecotypes differed in  the two ecosystems for percentage  of leaves, leaf: stem ratio and regrowth. Superior ecotypes (BRA004308, 003361, 003441) could be identified and were equally advantageous in both ecosystems.
Palavras-Chave: | Agronomic characters; Brasil; Brazilian savannas; Genotype environmental interaction; Interação genótipo ambiente; Selection.
Thesagro: | Brachiaria; Características Agronômicas; Cerrado; Melhoramento Genético Vegetal; Pastagem; Seleção.
Thesaurus Nal: | Brazil; pastures; plant breeding.
Categoria do assunto: | --
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (11099-1) - UPC - PL - -- - 633.2 - I61p -  - DIS