GENETIC DIVERGENCE IN COMMON BEAN GENOTYPES CULTIVATED IN NORTH OF MINAS GERAIS, BRAZIL

Authors

V. B. de Souza, Universidade Estadual de MaringáFollow
O. G. Brito, Universidade Federal dos Vales do Jequitinhonha e Mucuri
A. J. de Carvalho, Universidade Estadual de Montes Claros
M. B. de Oliveira, Universidade Estadual de Montes Claros
J. E. de S. Carneiro, Universidade Federal de Viçosa
J. C. Medeiros, Universidade Estadual de Montes Claros
M. L. Lacerda, Universidade Estadual de Montes Claros
J. V. S. Guerra, Universidade Estadual de Montes Claros
A. A. de Souza, Universidade Federal dos Vales do Jequitinhonha e Mucuri
S. M. de Oliveira, Universidade Estadual de Montes Claros

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: Common bean (Phaseolus vulgaris L.) presents a very great diversity of grains forms and color. It is a culture of great relevance for the Brazilian economic scenario, since its great importance and preference in the Brazilians food. The advance of genetic breeding has increased the number of cultivars with ideal characteristics of crop. However, the extensive use of one or more genetically similar cultivars provides narrowing of the genetic basis. Genetic diversity provides strategies that avoid the use of genetically similar cultivars and thereby avoid problems of origin mainly of biotic character. Thus, it is required that cultivars are not only adapted and productive, but also genetically divergent. Therefore, the objective of this work was to evaluate the genetic diversity of 25 common bean genotypes evaluated in the VCU tests in the north of Minas Gerais.

MATERIAL AND METHODS: The test carried out in Janauba were composed of 25 common bean genotypes of the carioca commercial group, selected among the breeding programs of UFV, UFLA, EPAMIG and EMBRAPA Rice and Bean. Soil preparation was conventional one, with a plowing and two harrowing. The area was then grooved and fertilized using a mechanized seeder adjusted for 0.5 m spacing between rows with a planting density of about 15 plants m^-1. The plots consisted of four rows of plants, 4 m in length, and additional irrigation was used. Grain yield, mean number of pods per plant (PPL), average number of grains per pod (GPP) and mass of 100 grains (M100) were evaluated. The data were submitted to analysis of variance for all the studied characteristics. The effect of the genotypes when significant were compared by the Scott- Knott test, at 5%. The generalized distance of Mahalanobis was used for the determinate genetic divergence among genotypes (SINGH, 1981). Tocher optimization method was used for the clustering. The analyzes were performed using the computational application in GENES genetic and statistical.