GENETIC-ANALYSIS OF SURVIVAL IN EUCALYPTUS-GLOBULUS SSP GLOBULUS

Genetic parameters for survival and diameter were estimated from measu rements from 4 to 5 year old progeny trials of Eucalyptus globulus ssp . globulus in Australia and Portugal. The trials comprised over 660 op en-pollinated families, covering the natural range of species. Individ ual narrow sense heritabilities for survival were moderate to high (av erage h(op)(2) = 0.31). Correlations between survival at different sit es were also moderate to high ranging from 0.16 to 0.92 (average of 0. 48), suggesting that in some instances survival ability can be determi ned by different genes. Diameter and survival were also positively cor related within sites (average r(g) = 0.54).