Quantitative analysis of correlations among flower traits in Gerbera hybrida, Compositae. III. Genetic variability and structure of principal component traits |
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Authors: | H Huang J Harding |
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Institution: | (1) Department of Environmental Horticulture, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA, US |
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Abstract: | A sample of 36 flower traits consisting of six morphological categories in the Davis population of gerbera was restructured
into phenotypic and genetic principal component traits. The first 5 phenotypic principal component traits accounted for 62%
of the total phenotypic variance of the 36 traits and have moderate to high heritablities. The first 5 genetic principal component
traits account for 97% of total genetic variance and all have high heritability. Morphological structure of these component
traits suggest an underlying process identified by the first genetic principal component involving largely trans and disk
floret traits. The results of this study indicate that the quantitative genetic structure of the gerbera flower is controlled
by a few independent components and that principal component analysis is a useful tool to reveal variation in this structure.
These composite traits are heritable and are expected to respond to selection.
Received: 20 September 1997 / Accepted: 19 January 1998 |
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Keywords: | Principal component analysis Genetic correlation Heritability Selection |
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