Principal component analysis on morphological traits in juvenile stage arabica coffee

Authors

  • Alexsandro Lara Teixeira Embrapa Rondônia
  • Flávia Maria Avelar Gonçalves UFLA - Universidade Federal de Lavras
  • Juliana Costa de Rezende EPAMIG - Empresa de Pesquisa Agropecuária de Minas Gerais
  • Rodrigo Barros Rocha Embrapa Rondônia
  • Antonio Alves Pereira Epamig - Unidade Regional da Zona da Mata - Campus da UFV S/N - Cx.P. 216 - 36570-000 -Viçosa - MG

DOI:

https://doi.org/10.25186/cs.v8i2.411

Keywords:

Early selection, multivariate, coffee breeding

Abstract

In plant breeding and selection, it is necessary to evaluate a great number of traits that are naturally associated. Thus, the use of multivariate analysis, such as Principal Component Analysis, can assist data interpretation. The aim of this study was to identify which morphological traits are of greatest importance to discriminate juvenile Coffea arabica genotypes. Cultivars, hybrids and some wild genotypes were evaluated from a coffee genebank maintained by the Empresa de Pesquisa Agropecuária de Minas Gerais, in Patrocínio, MG, Brazil. A randomized block experimental design was used with two replicates, spacing of 3.5 x 0.8 meters and ten plants per plot. The morphological characters were measured at 12 months after the plantation, at the plants juvenile phase. Only the first two major components explained 80.04% of total variance. Among the morphological evaluated traits, the length of the first plagiotropic branch, the plant vitality, the stem diameter and the nodes number of the first plagiotropic branch are the most important variables to discriminate the genotypes. These evaluations are important to the early selection of the genotypes of higher potential allowing to concentrate efforts in their evaluating, discarding other minor traits.

Author Biographies

Alexsandro Lara Teixeira, Embrapa Rondônia

Setor de pesquisa e desenvolvimento

Melhoramento genético do cafeeiro

Flávia Maria Avelar Gonçalves, UFLA - Universidade Federal de Lavras

Departamento de Biologia

Melhoramento genético do cafeeiro

Juliana Costa de Rezende, EPAMIG - Empresa de Pesquisa Agropecuária de Minas Gerais

Centro Tecnológico do Sul de Minas

Pesquisa e desenvolvimento do café

Rodrigo Barros Rocha, Embrapa Rondônia

Setor de pesquisa e desenvolvimento

Genética quantitativa e melhoramento

Published

2013-12-24

Issue

Section

Articles