Data/hora: 06/06/2024 05:28:45

Provedor de dados: 	61	
País: 	Brazil	
Título: 	Evaluation of physiological traits in upland rice for adaptation to no-tillage system	
Autores: 	Heinemann,Alexandre B.; Stone,Luís Fernando; Fageria,Nand K.; Castro,Lucas M. de.	
Data: 	2009-01-01	
Ano: 	2009	
Palavras-chave: 	Leaf area; Leaf expansion; Oryza sativa L; Shoot dry weight.	
Resumo: 	In the cerrado region of Brazil, no-tillage is an alternative management practice to conserve soil and reduce cost of crop production. However, many studies have been showed that there is a decrease in the yield when upland rice is cropped in this system. Therefore, there is a need that new breeding initiatives introgress favorable traits into upland rice for no-tillage adaptation. Key traits include faster emergence, ability to germinate when deep seeded, faster root development, and early canopy closure during the vegetative stages. All those traits can be summarized as "early vigor". So, the objective of this study was to evaluate physiological traits of four contrasting parental upland rice cultivars to verify their adaptation to no-tillage system. A greenhouse experiment with four upland rice cultivars (BRS Primavera, BRS Curinga, BRS Soberana, and Douradão) were planted at three different dates and growth at potential conditions. Development stages, total dry matter, leaf area, leaf dry matter, leaf length, leaf elongation rate and leaf duration were measured and calculated. Based on physiological traits, the four cultivars showed differences in the growth cycle. However, for biomass and leaf area growth and leaf expansion traits they did not differ significantly, probably being the lack of genetic "early vigor" a characteristic of the modern cultivars. The growth and development pattern was significantly affected by planting dates and not by cultivars.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000200004	
Editor: 	Brazilian Journal of Plant Physiology	
Relação: 	10.1590/S1677-04202009000200004	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Plant Physiology  v.21 n.2 2009	
Fonte: 	info:eu-repo/semantics/openAccess