Inheritance of frost resistance in F1, and advanced generation hybrids of Eucalyptus globulus and E. gunnii

Frost resistance of hybrids between the sensitive E. globules and resistant E. gunnii is inherited in an additive manner in both F, and advanced generation hybrids. Variation in the F, is continuous and tmimodel argoing that the ditkrence in frost resistance between these two species is under polygeneic control. There was no association between frost resistance and sezdhng height withii the F,, suggesting that it may be possible to select fast growing. frost resistance genotypes from advanced generation hybrids.