One hundred and twenty-six seedlots (115 open-pollinated families and 11 composites) of Eucalyptus fastigata
Deane & Maid, representing eight native provenances from New South Wales and Victoria, one exotic population from South Africa, and 15 exotic populations from New Zealand were planted in tests in 1979 at Kinleith and Kaingaroa, New Zealand. The trees were assessed at Kinleith in 1980 for height growth and tolerance to winter frosts, and at Kinleith and Kaingaroa in 1981 for incidence of forking.
The seedlots varied greatly in frost tolerance, height growth, and incidence of forking. Components of variance for ''provenances" were 3 to 4 times larger than components for "families-in-provenance". The hardiest provenances generally grew the slowest and showed the lowest incidence of forking. By far the hardiest native provenances were from Oberon and Barrington Tops, New South Wales, confirming the outstanding frost-tolerance of these provenances recorded in artificial frosting tests. Families from New Zealand and from Robertson, New South Wales, were notably more frost-tender and more forked than those from other Australian localities, and from South Africa. New Zealand families from Oakura and Hunterville showed excellent vigour but generally poor frosttolerance and a high frequency of forking. The provenance in which the families possessed the best combination of good frost-tolerance, fast growth, and freedom from forking was from Bondi State Forest (south of Bombala, New South Wales) towards the southern end of the species' natural range.
The phenotypic correlations among family means within provenances were -0.41 between frost score and 1-year height (i.e., the tallest families generally showed the least frost damage), and 0.49 between 3-month and 1-year heights. Frost score at Kinleith was not well correlated at the family level (though highly correlated at the provenance level) with incidence of forking at either Kinleith itself or Kaingaroa.