Susceptibility to bunch stem necrosis in grapes: A breeding screen
DOI:
https://doi.org/10.5073/vitis.1994.33.93-95Keywords:
bunch stem necrosis, disorder, resistance, xylem, model screening, variety of vineAbstract
A breeding screen has been developed with which it is possible to predict the resistance of newbred grapevine varieties to bunch stem necrosis. The screen is based on a 5-year study of 17 commercial varieties in which it was noted that in those which are sensitive to the disorder, xylem development is relatively reduced just distal to each branch point in the peduncle so as to form a short ''bottleneck'' (DURING and LANG 1993). The procedure advocated, offers a probabilistic assessment of susceptibility to the disorder, calculated from simple light microscope measurements on a relatively small amount of material.Downloads
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