Scientific paper

Preliminary Assessment of the Grading of Eucalyptus Clones Using Carbon Isotope Discrimination

Published in: South African Forestry Journal
Volume 154, issue 1, 1990 , pages: 51–55
DOI: 10.1080/00382167.1990.9629052
Author(s): W.J. BondBotany Department,, W.D. StockBotany Department,


Stable carbon isotopes were analysed in leaf material of nine Eucalyptus clones grown in field trials in the eastern Transvaal. Carbon isotope ratios, measured as d13C, differed within tree canopies, between replicate trees and between clones. Values from both north and south canopy positions were correlated with tree height after 13 months. Unexplained variation in the correlation may he interpreted, theoretically, as an indication that some clones use less water for the same level of productivity. With further testing, the method may have promise for early screening of clones in genotype/environment interaction trials and in selecting water-efficient trees.

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