Genetic parameters estimates and visual selection for leaves production in Ilex paraguariensis

Abstract

The selection of yerba mate superior genotypes, based on each plant leaf weight, is based on genetic parameters obtained from experimental plantations and it is practically impossible from the fourth year of age. Therefore, we estimate genetic parameters and check the feasibility of selection through notes and weight estimates of each tree at 18.5 years of age. The genetic material consists of a combined trial of provenances and progenies of half-sibs with 140 progenies from 7 provenances, installed in Iva, Paran, Brazil, in a randomized block design with 10 repetitions. The genetic control of leaf production is of low magnitude ( h 2 a = 0.175042 0.0393) revealing high influence of the environment.