Data/hora: 17/06/2024 03:55:12

Biblioteca(s): | Embrapa Arroz e Feijão.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 08/08/2011
Data da última atualização: | 08/08/2011
Autoria: | HEINEMANN, A. B.; SENTELHAS, P. C.
Afiliação: | ALEXANDRE BRYAN HEINEMANN, CNPAF; PAULO CESAR SENTELHAS, ESALQ.
Título: | Environmental group identification for upland rice production in central Brazil.
Ano de publicação: | 2011
Fonte/Imprenta: | Scientia Agricola, Piracicaba, v. 68, n. 5, p. 540-547, set./out. 2011.
Idioma: | Inglês
Conteúdo: | Upland rice (Oryza sativa L.) production is basically concentrated in four central Brazilian States, Mato Grosso, Goiás, Rondônia and Tocantins. To reduce the genotype and environment (G × E) interactions, the classification of environment groups was proposed. The goal of this study explores possibilities to adjust the upland rice regional breeding systems to optimally fit to the range of environments they are targeting, based on a historical yield data set of the Brazilian Geographic and Statistics Institute (IBGE, www.ibge.gov.br/home/) from 54 microregions. The specific objectives of this study were: (i) to identify and classify environmental groups in the Brazilian upland rice production area; (ii) to validate these environmental groups using yield data set from the upland rice multi-trial experiments (MTEs); (iii) and to identify the most representative site for each environmental group. For this the historical upland rice yield data from 54 microregions were detrented from the effects of technological advances and adjusted to the reference year, 2006. The adjusted yield data were used to build a matrix, which was submitted to a cluster analysis allowing the identification of three different environmental groups. These groups were classified as: highly favorable environment (HFE); favorable environment (FE); and less favorable environment (LFE). The HFE is less affected by inter-annual rainfall variability than the other two groups. The upland rice breeding programs must take into account the differences among the environmental groups to conduct their trials and suggest genotypes for the upland production area.
Palavras-Chave: | Breading program; Environment classification.
Thesagro: | Análise estatística; Arroz; Oryza sativa.
Thesaurus Nal: | Cluster analysis; Yields.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/39399/1/Scientiia.pdf
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (30690-1) - UPC - AP - DD - 2011.028 -  - 2011.028 - DIS