Abstract:

‘Guipu 9’is a new red，low-chilling requirement fresh-eating grape cultivar developed through conventional hybridization between’Ruiduhongyu（female parent）and‘Shine Muscat’（male parent）. The cultivar features conical panicles with single panicle weights ranging from 563.5 to 828.3 g. Grapes are obtuse-elliptical，weighing 8.3–10.5 g per berry. The thin-skinned berries exhibit a red color with minimal bloom，and the flesh-pulp separation resistance ensures easy peeling. It emits a distinct strawberry aroma，with an average soluble solids content of 19.3% and titratable acidity of 0.44%. In Guangxi，the cultivar supports a dual-harvest rain-sheltered cultivation system：the first crop initiates budbreak in late February，reaching full maturity by late June；the second crop is induced by pruning in late July，with budbreak in early August and maturity from late December to mid-December. The first-crop yield reaches 19 200 kg · hm^-2，while the second crop yields 12 750 kg · hm^-2. This cultivar is recommended for cultivation in Guangxi and climatically similar regions，offering extended harvest windows and enhanced market supply flexibility.

Key words: grape, low chilling requirement, dual-harvest per year, cultivar