Variabilidade genética em progênies de meios-irmãos de coentro

Abstract

A large number of producers are involved in the cultivation of coriander throughout the year in Brazil, making it a crop of social and economic importance. Throughout nearly the entire Northeast Region, cultivar Verdão is used. Genetic variability studies on coriander are important for the proper planning of genetic improvement programs. The aim of the present study was to quantify the genetic variability for agronomic characteristics in cv. Verdão to contribute information toward genetic improvement. The study was developed at Universidade Federal Rural de Pernambuco, Pernambuco State, Brazil, in a greenhouse, using randomized blocks of 28 plants in two pots and five replications. The treatments were composed of 55 half-sib progenies from cultivar Verdão. The t test detected significance at 1 and 5% likelihood between the genotypic, phenotypic and environmental correlations. Broad sense heritability ranged from 7.19 for average plant weight to 81.09 for number of bolted plants. The ratio between genetic and environmental coefficients of variation (CVg/CVe) ranged from 0.27 (average weight) to 2.07 (number of bolted plants), indicating that selection against bolting presents more favorable conditions in terms of immediate genetic gains. The genotype correlation between height of non-bolted plants and the number of bolted plants was considered strong (0.86) and highly significant (t test), enabling simultaneous gains from selection.