U.S. Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska

 

Date of this Version

3-2017

Citation

ANNUAL REPORT OF THE BEAN IMPROVEMENT COOPERATIVE, No. 60, March 2017. Published by USDA.

Comments

U.S. government work.

Abstract

INTRODUCTION: The snap bean (Phaseolus vulgaris L.) is a legume that is widely consumed on the world scenario due to its biochemical composition and nutritional quality (Furlan et al., 2016). Besides the nutritional compounds, the snap bean presents antioxidants properties, inhibiting or retarding the oxidative damage, which avoids the propagation of oxidative reactions and can prevent diseases caused by free radicals. (Silva et al., 2009).

The aim of this study was to evaluated the interaction between the antioxidant activity and pod size of several snap bean genotypes cultivated in the sowing season spring/summer and autumn/winter.

MATERIAL AND METHODS: The experiment was conducted in an organic system with protected cultivation in the municipality of Londrina, Paraná, Brazil. The study was conducted in a completely randomized design, in a factorial scheme (8 vs. 2), with four replications, being eigth snap bean genotypes with indeterminate growth pattern (Teresópolis Ag 481, HAV 69, HAV 41, Preferido Ag 482, Macarrão Brasília, Trepador Top Seed, HT 30 e Favorito Ag 480) and tow sowing season: spring/summer of 2014 and autumn/winter of 2015. Each experimental plot was composed by 10 plants spaced at 0.20 m in the line and 1.00 m between lines.

Samples of pods were collected from each treatment, being measured: the average pod mass, length and diameter of pods - measured in 10 pods per plant; And antioxidant activity (RUFINO et al., 2007). The data were submitted to analysis of variance by the F test (p <0.05) and compared by the principal component analysis (PCA), using software R (R, 2012).

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