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Evaluation of an andean common bean reference collection under drought stress

Pérez Vega, Juan Carlos and Blair, Matthew W. and Monserrate, Fredy and Ligarreto Moreno, Gustavo Adolfo (2012) Evaluation of an andean common bean reference collection under drought stress. Agronomía Colombiana; Vol. 29, núm. 1 (2011); 17-26 Agronomía Colombiana; Vol. 29, núm. 1 (2011); 17-26 2357-3732 0120-9965 .

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URL oficial: http://revistas.unal.edu.co/index.php/agrocol/arti...

Resumen

More than 60% of common bean (Phaseolus vulgaris L.) production worldwide is impacted by the risk of drought. In this study, the goal was to evaluate 64 bush bean genotypes from the CIAT reference collection to identify possible sources of drought resistance in the Andean gene pool. Phenotypic traits such as yield, 100-seed weight (P100) and days to physiological maturity (Dpm) were evaluated on selected accessions of this collection which was grown in an 8x8 lattice with two repetitions under three environments: intermittent drought (SI) and irrigation (R) in Palmira as well as early drought (ST) in Darién, Colombia. The genotypes included 20 from the Nueva Granada 1 (NG1) sub-race, 19 from the Nueva Granada 2 (NG2) sub-race, 10 from race Peru (P), 14 Andean control genotypes and one Mesoamerican check. The variables were analyzed through a combined ANOVA across environments, while simple correlations between yield and others variables were determinate. The genotypes with better adaptation to drought showed higher yields, 100-seed weight and fewer days to physiological maturity. The coefficients of correlations among yield and 100-seed weight were significant and positive, while Dpm showed negative correlation. Fourteen genotypes were identified as drought tolerant: G4001, G5625, G6639, G16115, G17070, G18255, G21210 and G22247 from the NG1 sub-race; G5708, G14253, G18264 and LRK31 from the NG2 sub-race; and DRK47 and G22147 from race Peru., More than 60% of common bean (Phaseolus vulgaris L.) production worldwide is impacted by the risk of drought. In this study, the goal was to evaluate 64 bush bean genotypes from the CIAT reference collection to identify possible sources of drought resistance in the Andean gene pool. Phenotypic traits such as yield, 100-seed weight (P100) and days to physiological maturity (Dpm) were evaluated on selected accessions of this collection which was grown in an 8x8 lattice with two repetitions under three environments: intermittent drought (SI) and irrigation (R) in Palmira as well as early drought (ST) in Darién, Colombia. The genotypes included 20 from the Nueva Granada 1 (NG1) sub-race, 19 from the Nueva Granada 2 (NG2) sub-race, 10 from race Peru (P), 14 Andean control genotypes and one Mesoamerican check. The variables were analyzed through a combined ANOVA across environments, while simple correlations between yield and others variables were determinate. The genotypes with better adaptation to drought showed higher yields, 100-seed weight and fewer days to physiological maturity. The coefficients of correlations among yield and 100-seed weight were significant and positive, while Dpm showed negative correlation. Fourteen genotypes were identified as drought tolerant: G4001, G5625, G6639, G16115, G17070, G18255, G21210 and G22247 from the NG1 sub-race; G5708, G14253, G18264 and LRK31 from the NG2 sub-race; and DRK47 and G22147 from race Peru.

Tipo de documento:Artículo - Article
Información adicional:© Facultad de Agronomía, Universidad Nacional de Colombia Se autoriza la reproducción y citación del material que aparece en la revista, siempre y cuando se indique de manera explícita: nombre de la revista, nombre del autor(es), año, volumen, número y páginas del artículo fuente. Las ideas y afirmaciones consignadas por los autores están bajo su responsabilidad y no interpretan necesariamente las opiniones y políticas de la Universidad Nacional de Colombia. La mención de productos o firmas comerciales en la revista no implica una recomendación o apoyo por parte de la Universidad ni de la Facultad; el uso de tales productos debe ceñirse a las recomendaciones de las etiquetas.
Palabras clave:andean races, water deficit, phenotypical traits, adaptation., andean races, water deficit, phenotypical traits, adaptation.
Unidad administrativa:Revistas electrónicas UN > Agronomía Colombiana
Código ID:19815
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :26 Junio 2014 03:06
Ultima modificación:18 Agosto 2014 14:49
Ultima modificación:18 Agosto 2014 14:49
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