Data/hora: 06/06/2024 10:35:56

Biblioteca(s): 	Embrapa Meio-Norte.	
Data corrente: 	14/04/1997	
Data da última atualização: 	14/04/1997	
Autoria: 	WHITE, J. W.; CASTILLO, J. A.; EHLERINGER, J. R.; SINGH, S. P.	
Título: 	Relations of carbon isotope discrimination and other physiological traits to yieald in common bean (Phaseolus vulgaris) under rainfed conditions.	
Ano de publicação: 	1994	
Fonte/Imprenta: 	Journal of Agricultural Science, v. 122, n. 2, p. 275-284, 1994.	
Idioma: 	Inglês	
Conteúdo: 	Although direct selection for seed yield under water deficit can result in genetic gains in the common bean (Phaseolus vulgaris L.), progress could be enhanced through selection for additional traits that are related to underiving mechanisms of adaptation to water deficit. Carbon isotope discrimination has received considerable attention as an indicator of water use efficiency and adaptation to water deficit. To test the utility of as a selection criterion, and other traits were measured in F2 and F3 generations of a nine-parent diallel grown under rainfed conditions at two locations in Colombia with contrasting soil types. An irrigated trial was also conducted at one location. Significant (P < 0.05) differences among parents, F2 and F3 were found for carbon isotope discrimination, leaf optical density (OD), leaf nitrogen (N) and potassium (K) concentrations, relative duration of pod-filling period (RDPF), shoot dry weight (SDW) and harvest index (HI). Effect of location and water regime and their interactions with genotype were also frequently significant. Heritability estimates, determined by regressing the F3 on the F2, ranged from 0.11 + - 0.11 (S.E.) to 0.33 + - 0.10 for OD,  0.22 + - 0.07 to 0.44 + - 0.09 for N, 0.04 + - 0.05 to 0.29 + - 0.08 for K, 0.40 + - 0.08 to 0.43 + - 0.15 for RDPF and 0.30 + -  0.22 to 1.00 + - 0.24 for SDW. All vallues for and H1 did not differ significantly from zero.	
Palavras-Chave: 	Bean; Estresse hidrico.	
Thesagro: 	Feijão; Fisiologia; Phaseolus Vulgaris.	
Thesaurus Nal: 	water stress.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio-Norte (CPAMN)	
Exemplares: 	CPAMN - (6050-1) - ADC - SP - -- - S 10655 -  - S 10655 - DIS