African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12218

Full Length Research Paper

Agronomic evaluation and web blight resilience of common bean genotypes in the littoral region of Ecuador

Ronald Villamar-Torres
  • Ronald Villamar-Torres
  • Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT), Ecuador.
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Luis Godoy Montiel
  • Luis Godoy Montiel
  • Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT), Ecuador.
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Julio Muñoz-Rengifo
  • Julio Muñoz-Rengifo
  • Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT), Ecuador.
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Samir Zambrano Montes
  • Samir Zambrano Montes
  • Facultad de Ciencias Pecuarias. Universidad Técnica Estatal de Quevedo. Quevedo, Los Ríos, Ecuador.
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Seyed Mehdi Jazayeri
  • Seyed Mehdi Jazayeri
  • Departamento de Biología, Facultad de Ciencias, Universidad Nacional de Colombia. Bogotá, Cundinamarca, Colombia.
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Naga Raju Maddela
  • Naga Raju Maddela
  • Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
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Luis Alcivar Torres
  • Luis Alcivar Torres
  • Facultad de Ciencias Agropecuarias. Universidad Técnica de Babahoyo. Babahoyo, Los Ríos-Ecuador.
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Alexis Matute Matute
  • Alexis Matute Matute
  • Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT), Ecuador.
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Marcos Heredia Pinos
  • Marcos Heredia Pinos
  • Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT), Ecuador.
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Ousseini Issaka Salia
  • Ousseini Issaka Salia
  • Faculty of Sciences and Techniques. Abdou Moumouni University of Niamey, Niger.
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Felipe Garcés-Fiallos
  • Felipe Garcés-Fiallos
  • Facultad de Ciencias Agrarias, Universidad de Guayaquil (UG), Guayaquil, Ecuador.
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  •  Received: 14 October 2017
  •  Accepted: 13 February 2018
  •  Published: 07 March 2018

Abstract

Common bean is very important in the daily diet of Ecuadorians. Web blight (Rhizoctonia solani (Kuhn) is the major constraint faced by common bean farmers in Ecuador and everywhere in the world, causing high losses of yield grain every year. A constant selection of genotypes with excellent productive and resilience to disease features in each region is presented as a potential solution to these problems. The present study aimed to evaluate the phenology, web blight resilience and grain yield production of 17 common bean genotypes in field conditions, in the Guayas River Basin, Ecuador. Three commercial varieties (two belonging to determined feature and one to undetermined feature) and 14 more promising genotypes were evaluated. Day period for phenological stage R6 (full bloom) and R9 (flowering maturity), web blight resilience, number of harvested pods, number of grains per pod per plant, 1000-seed weight, grain yield and later yield per hectare were measured. Scott Knott test (p ≤ 0.05) was executed for mean comparisons and principal component analysis (PCA) statistical test was performed using the productive and agronomical variables, successfully distinguishing two group of genotypes according to their types of growth (determined and undetermined), highlighting the genotypes EVG-6-103, EVG-6, CAL-96, INIAP-473, AFR-619, INIAP-474, AFR-298, SER-29, SER-35, EVG-16-08 which showed the higher agronomic, sanitary, and productively averages in approximately all the studied variables.

Key words: Phaseolus vulgaris L., Rhizoctonia solani (Kuhn), yield.