关键词: 葡萄, 种质资源, 果穗, 穗形, 评价标准

Abstract:

The present study investigated the cluster shape of 234 varieties of grape germplasm resources. According to the“Descriptors and Data Standard for Grape（Vitis L.）”，we further categorized the grape cluster shape into the following five classes：long cone，short cone，long cylinder，short cylinder and branch. Among them，varieties with the long-cone clusters are dominant（34.61%），followed by the short-cone（33.33%），and the branched varieties are the least（5.13%）. The cluster shape of table grape is mainly long conical，while the shape of wine grape is mainly short conical. The probability grading method was adopted to determine the hierarchical criterion of cluster length，width，weight and size. Using the above four traits as parameters，the fuzzy synthetic evaluation method evaluated the cluster appearance of the grape germplasm resources by giving each cultivar a specific score. The results of weighted evaluation and equal weight evaluation were generally consistent，and some varieties with good appearance，such as ‘Tensyū’，‘Cardinal’and‘Triumph’，were obtained. This study not only enriches the grape germplasm resource evaluation，but also provides a theoretical basis for further utilization of grape germplasm resources to breed new varieties.

Key words: Vitis vinifera, germplasm resource, cluster, shape, Evaluation criteria