Eucalyptus camaldulensis × globulus hybrids
2003
Meddings, Rachel A. | McComb, Jen A. | Calver, Michael C. | Thomas, Sandra R. | Mazanec, Richard A.
Controlled pollination techniques were used to produce hybrids between Eucalyptus camaldulensis and E. globulus, with E. camaldulensis as the female parent. There were substantial barriers to hybridisation, with a 28% reduction in the percentage capsule set, a 78% reduction in the number of seeds produced per capsule, a 99% increase in the number of inviable abnormal seedlings and overall a 92% reduction in the number of normal seedlings produced per pollinated flower compared with outcrossed E. camaldulensis. The number of normal seedlings per pollinated flower varied from 0.1 to 4.7 and was most strongly affected by the source of the pollen. Selfing E. camaldulensis showed it to be partially self-incompatible, with a 29% reduction in the percentage capsule set and an 86% reduction in the number of seeds produced per capsule compared with outcrosses. One reciprocal combination of E. camaldulensis clones originating from Erudina and Broken Hill gave a very low seed set.
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