Light use efficiencies of potato cultivars with late blight (Phytophthora infestans) |
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| Authors: | M Van Oijen |
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| Institution: | (1) Centre for Plant Breeding Research (CPO), Wageningen, The Netherlands;(2) Present address: Centre for Agrobiological Research (CABO), P.O. Box 14, 6700 AA Wageningen, The Netherlands |
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| Abstract: | Summary Potato cultivars of different maturity classes and levels of resistance toPhytophthora infestans were grown under several disease intensities in three field trials. Seasonal courses of ground cover by green foliage and
final tuber yields were determined. Light use efficiencies (LUE) were calculated from regression analyses of yield on cumulative
light interception.
Late blight reduced tuber yields by decreasing cumulative light interception without affecting LUE. No differences in LUE
between cultivars or cultivar classes were detected. Therefore, the maintenance of green leaf area is important when breeding
potatoes for optimal performance in the presence of late blight.
The results support the hypothesis that the correlation between lateness and reported resistance of potato cultivars is due
to the vigorous foliage growth of late cultivars. |
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| Keywords: | ground cover light interception tuber yield Solanum tuberosum L |
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