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Genetic variation in the juvenile leaf morphology of Eucalyptus globulus Labill. ssp globulus


Potts, BM and Jordan, GJ, Genetic variation in the juvenile leaf morphology of Eucalyptus globulus Labill. ssp globulus, Forest Genetics, 1, (2) pp. 81-95. ISSN 1335-048X (1994) [Refereed Article]


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Copyright 1994 Arbora Publishers

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The patterns of genetic variation in the length and shape of juvenile leaves of Eucalyptus globulus ssp globulus are described. Significant additive genetic variation occurred within populations for all traits. The individual narrow-sense heritabilities estimated for lamina length (h2= 0.37) and two leaf shape traits (relative lamina width 0.34 and degree of basal lobing 0.29) were significantly greater than the estimate for the position of the widest point of the lamina (0.19). Significant genetic differences also occur between populations in both leaf length and shape with the strongest differentiation occurring in leaf length. There were strong intra- and interpopulation genetic correlations amongst most of the leaf traits. Height and volume at two years of age were genetically independent of leaf length, but within populations, faster growth was genetically correlated with increased basal lobing and a shift of the widest point closer to the leaf base. The intra- and interpopulation genetic correlations were markedly different for some pairs of traits. Leaf length was genetically independent of the height of transition from the juvenile to the adult leaf form within populations, yet genetic differences between populations were highly correlated. Growth was more highly genetically correlated with different facets of leaf shape within populations than between populations. It is argued that correlated selection is the most likely cause of correlated genetic variation between populations when traits are genetically independent within populations.

Item Details

Item Type:Refereed Article
Keywords:Eucalyplus globulus, leaf morphology, genetic variation, heritability, genetic correlations
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Genetics not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Native forests
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Jordan, GJ (Professor Greg Jordan)
ID Code:86567
Year Published:1994
Deposited By:Plant Science
Deposited On:2013-09-24
Last Modified:2013-10-01
Downloads:272 View Download Statistics

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