Data/hora: 22/06/2024 07:05:23

Biblioteca(s): | Embrapa Amapá; Embrapa Milho e Sorgo; Embrapa Unidades Centrais.
Data corrente: | 24/03/2006
Data da última atualização: | 11/10/2022
Autoria: | RODRIGUES, M. C.; CHAVES, L. J.; PACHECO, C. A. P.
Afiliação: | MARCIO COSTA RODRIGUES, CPAF-AP; LÁZARO JOSÉ CHAVES, UNIVERSIDADE FEDERAL DE GOIÁS; CLESO ANTONIO PATTO PACHECO, CNPMS.
Título: | Heterosis in crosses among white grain maize populations with high quality protein.
Ano de publicação: | 2006
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, v. 41, n. 1, p. 59-66, jan. 2006.
Idioma: | Inglês
Conteúdo: | The objective of this work was to investigate heterosis and its components in 16 white grain maize populations presenting high quality protein. These populations were divided according to grain type in order to establish different heterosis groups. The crosses were carried out according to a partial diallel cross design among flint and dent populations. Seven agronomic traits were evaluated in three environments while four leaf diseases and incidence of corn stunt were evaluated in one. Least square procedure was applied to the normal equation X'Xb = X'Y, to estimate the model effects and their respective sum of squares. Among the heterosis components, in diallel analysis, significance for average heterosis in grain yield, number of days to female flowering and to all evaluated diseases was detected. Specific heterosis was significant for days to female flowering and resistance to Puccinia polysora. Results concerned to grain yield trait indicate that populations with superior performance in dent group, no matter what flint population group is used in crosses, tend to generate superior intervarietal hybrids. In decreasing order of preference, the dent type populations CMS 476, ZQP/B 103 and ZQP/B 101 and the flint type CMS 461, CMS 460, ZQP/B 104 and ZQP/B 102 are recommended to form composites.
Palavras-Chave: | capacidade geral de combinação; dialelo parcial; partial diallel.
Thesagro: | Milho; Zea Mays.
Thesaurus Nal: | general combining ability.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/35450/1/41n01a09.pdf
Registro original: | Embrapa Amapá (CPAF-AP)

Exemplares:

AI-SEDE - (35450-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CPAF-AP - (9399-1) - UPC - AP - PP -  -  -  - DIS
CNPMS - (18469-1) - UPC - AP - DD -  -  -  - DIS