Data/hora: 12/06/2024 05:34:48

Biblioteca(s): | Embrapa Milho e Sorgo.
Tipo da produção científica: | Artigo em Periódico Indexado
Data corrente: | 06/07/1997
Data da última atualização: | 19/07/2018
Autoria: | VIANNA, R. T.; GAMA, E. E. G. e; NASPOLINI FILHO, V.; MORO, J. R.; VENCOVSKY, R.
Afiliação: | EMBRAPA/CNPMS.
Título: | Inbreeding depression of several introduced populations of maize (Zea mays L.).
Ano de publicação: | 1982
Fonte/Imprenta: | Maydica, Bergamo, v. 27, n. 3, p. 151-157, 1982.
Idioma: | Inglês
Conteúdo: | An inbreeding depression study was conducted with 14 maize populations introduced from CIMMYT to the National Corn and Sorghum Research Center, Sete Lagoas, MG, Brasil. It was initiated by selfing 200 unselected So plants per populations and from each 100 ears were selected. The S1 generation of each population was represented by a mixture of 100 kernels from each of the 100 selected ears. Experiments were conducted in 1979 at two locations to evaluated yield change associated with inbreeding by selfing. A drought period caused considerable yield reduction a Piracicaba. In these populations, with inbreeding due to only one selfing generation, mean yield reduction ranged from 31 to 65% and 44 to 69% at Sete Lagoas and Piracicaba, respectively. In bothlocalization a significant interaction between population ans inbreeding depression was observed. In general materials grown under moisture stress did not respond the same as under non stress conditions. In the non stress environment data confirmed that the synthetic variety showed a significant lower inbreeding depression than broad basis populations.
Palavras-Chave: | Maize.
Thesagro: | Melhoramento; Milho; Zea Mays.
Thesaurus Nal: | breeding.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (4350-1) - UPC - AP - DD -  -  -  - DIS