A lengthy (73 pages) and interesting report from July 2017 with both economic and agricultural evaluations.
At page 49 there is a list of the top 10 commercial jujube cultivars grown in China.
Pages 51-53 are descriptions of some of the cultivars that the article’s author would like to import into Australia from China. This is an excellent list. Some of these are early ripening cultivars. I wish we had all of them in the US (I think we have at least three of them) but the cultivar that interests me the most is Zanhuangdazao (Gold silk jujube), a triploid which is grown in Hebei and Zanhuang:
"Tree is tall and upright, Fruit oblong or obovate, diameter 4.1x3.1cm, average fruit weight 17.3g, max 29g. Peel is thick and dark reddish brown. Flesh nearly white, dense, medium juice, sweet and sour.
Only natural triploid, fruit suitable for dry, candied and fresh. Versatile, adaptable, resistant to drought, suitable for warm climate."
Shengrui
jujubemulberry
mamuang
BobVance
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Bede