Abstract

Objetivou-se com esse trabalho avaliar a divergência genética de genótipos de cafeeiros resistentes à ferrugem do Banco de Germoplasma de café de Minas Gerais, com base em características anatômicas. Foram avaliadas 12 características anatômicas foliares e a distância generalizada de Mahalanobis foi usada para quantificar a divergência genética entre os genótipos. Foram empregados como estratégia de agrupamento, o agrupamento de Tocher e o método hierárquico UPGMA (Unweighted Pair-Group Method Using Arithmetic Averages), além disso, foi feita a análise da contribuição relativa das variáveis. Houve variabilidade genética entre os genótipos, sendo que a análise do agrupamento de Tocher e UPGMA separaram os genótipos em cinco e sete grupos distintos, respectivamente. O genótipo MG 0582 se destacou como o mais divergente dentre os demais com base nas características anatômicas avaliadas. Conclui-se que existe uma grande variabilidade genética para as características da anatomia foliar entre os 15 genótipos avaliados, possibilitando a seleção de genótipos superiores com base nessas características.

Highlights

  • The success of genetic breeding programs allowed producers to achieve a more adapted, productive and high-quality coffee. These cultivars have already reached high levels of productivity, new features may arise from the development of cultivars with better resistence to pests, diseases or with specific characteristics that are adapted to new agricultural frontiers or product quality. These characteristics are found in Coffea arabica L. and in wild species of Coffea, highlighting the importance of a germplasm bank (EIRA et al 2007)

  • The aim of this study was to evaluate the genetic divergence between coffee genotypes resistant to rust based on leaf anatomy characteristics, using material from the Minas Gerais Germplasm Bank

  • The number of groups formed through the Tocher method demonstrates the wide variability between the genotypes studied. These results show that the genotypes present variability in leaf anatomy characteristics, showing that the leaves have foliar alterations with variations in their structure

Read more

Summary

Introduction

The success of genetic breeding programs allowed producers to achieve a more adapted, productive and high-quality coffee These cultivars have already reached high levels of productivity, new features may arise from the development of cultivars with better resistence to pests, diseases or with specific characteristics that are adapted to new agricultural frontiers or product quality. These characteristics are found in Coffea arabica L. and in wild species of Coffea, highlighting the importance of a germplasm bank (EIRA et al 2007).

Objectives
Methods
Results
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call