Site and Age Effects on Genotypic Control of Juvenile Juglans Nigra L. Tree Height

1989

5 Abb., 2 Tab., 11 Lit. Ang., En, Zfsg. En

Unselbständiges Werk

4683

200030132

Trends in heritabilities for tree height and coefficients of genetic prediction from three black walnut progeny tests were compared from establishment through age 13. Although the trend in genetic variance components was relatively uniform from location to location, the patterns of variation for heritabilities and other variance components differed, underscoring the site sensitivity of the species. It is concluded that black walnut progeny tests should employ singe-tree plots or noncontiguous family plots for more precise estimation of genetic and environmental parameters.