Physiological and genetic control of tuber formation |
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Authors: | Paul C Strunik Dick Vreugdenhil Herman J van Eck Christian W Bachem Richard G F Visser |
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Institution: | (1) Laboratory for Theoretical Production Ecology, Department of Plant and Crop Sciences, Wegeningen University, P.O. Box 430, 6700 AK Wageningen, The Netherlands;(2) Laboratory for Plant Physiology, Department of Plant and Crop Sciences, Wageningen University, Arboretumlaan 4, 6703 BD Wageninge, The Netherlands;(3) Laboratory for Plant Breeding, Department of Plant and Crop Sciences, Wageningen University, Lawickse Allee 166, 6709 DB Wageningen, The Netherlands |
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Abstract: | Summary Tuber formation is a plalstic and complex, but well-orchestrated sequences of morphological. physiological and biochemical
events. The physiological control mechanisms of this sequence of events may involve many hormones, but certainly gibberellic
acids play a dominant role: they affecft most steps and are influenced by inducing or non-inducing conditions in a manner
consistent with effects of these conditions on tuber induction. The genetic control is also complex. Numerous cDNA fragments
have been isolated which are specifically expressed during tuberization. They can be used in anti-sense orientation in transgenic
plants to thest their possible role in tuberization. In addition these cDNA fragments are used as genetic marker loci in QTL
mapping studies and serve as candidate genes to exlain phenotypic variation. Profiles of the importance of QTLs over time
may be combined with expression profiles of candidate genes. Such novel approaches offer unique opportunities for synergism
between physiology, molecular biology and genetics. |
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Keywords: | tuberization stolon formation hormones morphological changes gibberellins QTL mapping fingerpringting carbohydrate metabolism |
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