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| International Agrophysics |
| publisher: | Institute of Agrophysics
Polish Academy of Sciences
Lublin, Poland |
| ISSN: |
0236-8722 |
vol. 20, nr. 4 (2006)
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Multivariate analysis of image descriptors of common wheat (Triticum aestivum)
and spelt (T. spelta) grain infected by Fusarium culmorum
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E. Suchowilska
, M. Wiwart
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University of Warmia and Mazury, Department of Plant Breeding and Seed Production, 10-724 Olsztyn, pl. Łódzki 3, Poland
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vol. 20 (2006), nr. 4,
pp. 345-351
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abstract
The response of five spring common wheat and
five spring spelt cultivars to the infection of their spikes with
Fusarium culmorum was examined using the shape and colour
analysis of kernel images. The results obtained suggest that there is
a significant correlation between the thousand kernel weight
(TKW) and the shape descriptors of the kernel image: area, perimeter,
length and width. Such a correlation was observed especially
for TKW and image area (Pearson's correlation coefficient r ranged
from 0. 737 for common wheat to 0. 914 for spelt) as well as for
the shape coefficient S5 calculated on the basis of image length and
area (r equalled 0.716 and 0.886, respectively). A significant
correlation was also observed for TKW and H (hue), S (saturation)
and I (intensity) of colour of the kernel image. The results of cluster
analysis performed for the values of H, S, I and S5 permitted precise
differentiation between kernels obtained from control and infected
heads of common wheat and spelt. A reliable evaluation of grain
infection by F. culmorum was possible only when the results of
both shape and colour analysis were considered.
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keywords
Fusarium head blight, grain, image analysis,
wheat, spelt
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