The genetic control of flowering time in Eucalyptus globulus, E. nitens and their F1 hybrids

Flowering time in a base population trial of Eucalyptus globulus ssp. globulus was highly variable and under strong genetic control. Races from the east coast of Tasmania and the Furneaux Group flowered approximately 1 month earlier than races from Victoria and King Island. These racial differences in flowering time were inherited in an additive manner in interprovenance F₁ hybrids, whereas the flowering time of interspecific F₁ hybrids between E. nitens and E. globulus was more similar to the late-flowering E. nitens.