Data/hora: 04/06/2024 04:22:55

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	08/04/2015	
Data da última atualização: 	21/03/2016	
Autoria: 	HEINEMANN, A. B.; BARRIOS-PEREZ, C.; RAMIREZ-VILLEGAS, J.; ARANGO-LONDOÑO, D.; BONILLA-FINDJI, O.; MEDEIROS, J. C.; JARVIS, A.	
Afiliação: 	ALEXANDRE BRYAN HEINEMANN, CNPAF; CAMILO BARRIOS-PEREZ, CIAT; JULIAN RAMIREZ-VILLEGAS, CIAT; DAVID ARANGO-LONDOÑO, CIAT; OSANA BONILLA-FINDJI, CIAT; JOÃO CARLOS MEDEIROS; ANDY JARVIS, CIAT.	
Título: 	Variation and impact of drought-stress patterns across upland rice target population of environments in Brazil.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Journal of Experimental Botany, London, v. 66, n. 12, p. 3625-3638, June 2015.	
DOI: 	10.1093/jxb/erv126	
Idioma: 	Inglês	
Notas: 	Published online April 4, 2015.	
Conteúdo: 	The upland rice (UR) cropped area in Brazil has decreased in the last decade. Importantly, a portion of this decrease can be attributed to the current UR breeding programme strategy, according to which direct grain yield selection is targeted primarily to the most favourable areas. New strategies for more-efficient crop breeding under non-optimal conditions are needed for Brazil?s UR regions. Such strategies should include a classification of spatio-temporal yield variations in environmental groups, as well as a determination of prevalent drought types and their characteristics (duration, intensity, phenological timing, and physiological effects) within those environmental groups. This study used a process-based crop model to support the Brazilian UR breeding programme in their efforts to adopt a new strategy that accounts for the varying range of environments where UR is currently cultivated. Crop simulations based on a commonly grown cultivar (BRS Primavera) and statistical analyses of simulated yield suggested that the target population of environments can be divided into three groups of environments: a highly favorable environment (HFE, 19% of area), a favorable environment (FE, 44%), and least favourable environment (LFE, 37%). Stress-free conditions dominated the HFE group (69% likelihood) and reproductive stress dominated the LFE group (68% likelihood), whereas reproductive and terminal drought stress were found to be almost equally likely to occur in the FE group. For the best and worst environments, we propose specific adaptation focused on the representative stress, while for the FE, wide adaptation to drought is suggested. ?Weighted selection? is also a possible strategy for the FE and LFE environment groups.	
Thesagro: 	Arroz; Deficiência hídrica; Melhoramento; Oryza sativa; Resistência a seca.	
Thesaurus Nal: 	Breeding; Models; Rice.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (33264-1) - UPC - AP - DD - 2015.009 -  - 2015.009 - DIS