Mycosphaerella leaf disease: Genetic variation in damage to Eucalyptus nitens, Eucalyptus globulus, and their F1 hybrid

Abstract

Severity of Mycosphaerella leaf disease was assessed on the adult and juvenile foliage of both controlled crossed and open-pollinated families of Eucalyptus globulus ssp. globulus Labill., Eucalyptus nitens (Deane and Maiden) Maiden, Eucalyptus globulus ssp. bicostata (Maiden, Blakely and J. Simm.) Kirkpatr., and their F1 hybrids in a trial in northwest Tasmania, Australia. Within ssp. globulus, disease was more severe on one provenance, Taranna, than another, King Island. For interprovenance hybrids, differences between parents were inherited in an additive manner, whereas interspecific hybrids were generally more susceptible than predicted intraspecific midparent values and occasionally, w..