Articles
FLOWERING BEHAVIOUR OF FOUR CLONES OF VELTHEIMIA BRACTEATA
Article number
570_47
Pages
341 – 343
Language
English
Abstract
Veltheimia bracteata is a bulbous plant indigenous to South Africa.
Under natural growing conditions it is evergreen and flowers during June to September.
Four clones of V. bracteata from different origins were obtained and grown in a temperature-controlled greenhouse in preparation for a study on the manipulation of flowering date.
The observations on the flowering behaviour of the four clones is reported here.
The cumulative flowering curves of all four clones showed a clear S shaped pattern with initial slow flowering, speeding up before slowing down to approach a limit.
These patterns were modelled by means of the Gompertz Curve using the Genstat TM Statistics Package which gave the best fit.
The four clones differed from one another regarding the maximum flowering rate as well as the flowering period.
One clone had a high flowering rate, two an intermediate rate and one a low rate.
Two of the clones were early flowering and the other two were late flowering.
All differences were significant at the 95% confidence limit.
These results indicate that results obtained by experimentation with one clone cannot readily be interpolated to other clones if the parameters of maximum flowering rate and timing of flowering are deemed to be important.
Under natural growing conditions it is evergreen and flowers during June to September.
Four clones of V. bracteata from different origins were obtained and grown in a temperature-controlled greenhouse in preparation for a study on the manipulation of flowering date.
The observations on the flowering behaviour of the four clones is reported here.
The cumulative flowering curves of all four clones showed a clear S shaped pattern with initial slow flowering, speeding up before slowing down to approach a limit.
These patterns were modelled by means of the Gompertz Curve using the Genstat TM Statistics Package which gave the best fit.
The four clones differed from one another regarding the maximum flowering rate as well as the flowering period.
One clone had a high flowering rate, two an intermediate rate and one a low rate.
Two of the clones were early flowering and the other two were late flowering.
All differences were significant at the 95% confidence limit.
These results indicate that results obtained by experimentation with one clone cannot readily be interpolated to other clones if the parameters of maximum flowering rate and timing of flowering are deemed to be important.
Publication
Authors
J.L. Ehlers, P.J.J. van Vuuren, L. Morey
Keywords
flowering curves, flowering period, Veltheimia
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