日本东京都农试以巨峰为母本,与亚力山大杂交育出葡萄新品种——黑曜。该品种树势旺,似巨峰。幼叶尖端为浅红色,这点与巨蜂明显不同。枝为暗褐色。开花期5月下旬,比巨峰稍迟。花粉丰富。果穗、果粒都与巨峰一样大。果实含糖17—18度,酸味小,味比巨峰还好。采收期为8月下旬—9月中旬,较耐贮藏。抗害性较强,也抗病虫,所以比巨峰易栽培。 Japan Tokyo agricultural experiment to Kyoho as the mother of the hybrid with the Alexander bred new grape varieties - Obsidian. The species vigor Wang, like a giant peak. The tip of young leaves is light red, which is obviously different from the giant bee. Branches dark brown. Flowering in late May, later than the peak. Pollen rich. Ear, fruit and Jufeng are the same size. Fruity 17-18 degrees sugar, sour, taste better than the peak. Harvest period for late August - mid-September, more resistant to storage. Strong resistance, but also resistant to pests, so easy to cultivate than the peak.