Breeding report of a new big fruit grey jujube cultivar Qianghui No. 2

Abstract: Qianghui No. 2, a new grey jujube (Ziziphus jujuba Mill.) variety, was discovered in 2009 in Ruoqiang County, Henan Province as a natural bud sport of gray jujube introduced from Xinzheng. This variety had the advantages of large fruit size and high fruit setting rate. It could bear fruit in the same year of grafting and enter the full productive period in 3-4 years. The bud burst period was in mid April, the initial flowering period in mid May, the full flowering period in early June, the fruit setting period in early June, and the fruit ripening period in early October. The fruit was nearly circular in shape, the average weight of the fruits was 15.3 g. During the full productive period, the average yield per mu was 800-1000 kg (dried dates). The skin was reddish brown and the flesh was loose. The kernel was spindle shape. The quality of the fruits was excellent. This variety was easy to manage and had strong adaptability. It was recognized by the Autonomous Region Forest Variety Approval Committee as“New R- SV- ZJ- 004- 2015”, it was approved by the Autonomous Region Forest Variety Approval Committee as New S-SV-ZJ-002-2020 and officially named Qianghui No. 2 in 2020.