Data/hora: 21/06/2024 11:05:29

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 23/09/1997
Data da última atualização: | 18/07/2018
Autoria: | MAGNAVACA, R.; OLIVEIRA, A. C.; MORAIS, A. R.; GAMA, E. E. G.; SANTOS, M. X. dos.
Afiliação: | EMBRAPA/CNPMS; ANTONIO CARLOS DE OLIVEIRA, CNPMS.
Título: | Family hybrid selection on quality protein maize (Zea mays L.).
Ano de publicação: | 1989
Fonte/Imprenta: | Maydica, Bergamo, v. 34, n. 1, p. 63-71, 1989.
Idioma: | Inglês
Conteúdo: | The objective of this study was to investigate the possibility of developing high yielding quality protein maize (QPM) family hybrids based on full-sibs derived from CIMMYT QPM populations, that have the opaque-2 gene but normal-appearing yellow kernels. A 5x6 and 10x10 partial diallel of full-sib families plus parents were tested in four locations in Brazil. The 5x6 partial diallel consisted of early cycle flint x dent full-sibs, and the 10x10 consisted of intermediate cycle flint x dent full-sibs. The average heterosis was 33.7% and 28.2% for the early and intermediate crosses, respectively, while high parent heterosis was 60.5% for the best heterotic cross. Average ear weights of full-sib parents collected at the four locations helped in determining the feasability of using the full-sibs for hybrid production. In general, full-sib parents had more environmental interactions than the full-sib corsses. The average difference of parents and crosses had a significant interaction with environment. These results gave the opportunity to select hybrids with a broad or specific adaptation to environments. Superior families for inbred line development were detected, indicating that the objectives of developing high-yielding QPM family hybrids could be met in a short period of time.
Palavras-Chave: | Maize; Protein; QPM; Quality.
Thesagro: | Melhoramento; Milho; Proteína; Qualidade; Zea Mays.
Thesaurus Nal: | breeding.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (5299-1) - UPC - AP - DD -  -  -  - DIS