Parâmetros genéticos para caracteres silviculturais em cedro australiano

Genetic parameters and promising provenances and progenies for enhanced silvicultural traits in Eremanthus erythropappus

“…Within the estimates of the components of genetic variance, there was a greater contribution of the additive genetic variance (σ² a ) than of the genetic variance between provenances (σ² proc ) for all traits (Table 3). Similar behavior to that of Toona ciliata progenies was demonstrated by Santos et al (2021). Due to a low expression of σ² proc , there was a low coe cient of determination of the effects of provenances (c² proc ), all lower than 4.5%, similar to those found in Eucalyptus urophylla provenances in tests in Brazil (Hodge and Dvorak, 2015).…”

“…Similar heritability was obtained for the H of E. erythropappus at different ages, ranging from 0.08 to 0.18 (Avelar et al 2021). In T. ciliata, higher heritability estimates were obtained for H (0.30) and DBH (0.15), but with a reduction in values with planting age due to environmental factors, such as intraspeci c competition (Santos et al 2021).…”

“…The higher magnitudes of the coe cient of variation (CVe%) may be associated with the differential response of genotypes to stressors such as aluminum toxicity, low soil fertility, water de cit, high temperatures, pest attacks, and res that may occur throughout cultivation (Santos et al 2021). In eld experiments, high values of CVe% are expected, with those between 10% and 20% being considered adequate (Pimentel-Gomes 2009).…”