GENETIC CONTROL OF PRODUCTIVITY AND GENOTYPES BY ENVIRONMENTS INTERACTION FOR Eucalyptus dorrigoensis IN SOUTHERN BRAZIL

Abstract

This study aimed to estimate the genetic parameters and assess the Genotype x Environment interaction for two Eucalyptus dorrigoensis progeny tests at 2.5 years of age. Both tests were established with single tree plots in Sertão Santana and Lavras do Sul, Rio Grande do Sul State, Brazil. Each test contained 98 progenies, with five checks. The evaluated traits were diameter at breast high (DBH), total height (H), volume (Vol), and mean annual increment (MAI). For Sertão Santana, the narrow sense heritability ranged from 0.46 (H) to 0.64 (Vol/MAI) and for Lavras do Sul it ranged from 0.38 (H) to 0.47 (Vol/MAI). The CV_g% values varied from 8.12% (H) to 26.06% (Vol/MAI). Greatest genetic correlation occurred between DBH and MAI, reaching 0.98. The G x E interaction was significant and mostly complex (78.70%). The best genetic materials for each environment, along with the most stable genetic materials, were identified.