New Zealand Journal of Botany abstracts

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VARIATION IN NATURAL POPULATIONS OF PINUS RAD1ATA IN CALIFORNIA
PART I. SAMPLING METHODS AND BRANCH CHARACTERS

Margot B. Forde

Forest Research Institute, Rotorua

Abstract Samples of branches, cones, and needles were collected from the three Californian populations of Pinus radiata in the spring of 1961. A number of morphological characters were measured in these samples, and the amount of variation and its distribution among different levels of sampling were examined by means of hierarchal analyses of variance. The length of the annual branch shoot, the number of branch and cone whorls on it, and the number of branchlets per branch whorl were found to be highly variable in all areas, and in these characters no significant differences could be shown between the populations. The number of whorls and the number of branchlets per whorl are positively correlated with the length of the shoot. Annual shoots with a relatively high proportion of cone whorls tend to be shorter than those with fewer or no cone whorls.

N.Z. J. Bol 2 : 213-36
(Received for publication, 8 July 1964)

PDF file of entire paper: medium quality (3204K); (scanned from paper original: notes about this process)

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