Abstract

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Title:: Evaluation of Five Natural Variants Materials From Ziziphus jujuba Mill.‘Dongzao’

Author(s):: LUO Zhi1; ZHENG Xingjuan1; WANG Lihu2; 3; YI Kuilin4; WANG Jiurui1; 3; LIU Mengjun3; 5; (1.College of Forestry,Hebei Agricultural University,Baoding,Hebei 071001;2.College of Horticulture,Hebei Agricultural University,Baoding,Hebei 071001;3.Research Center of Chinese Jujube,Hebei Agricultural University,Baoding,Hebei 071001;4.Zhanhua Institute of Dongzao,Zhanhua,Shandong 256803;5.Beijing Collaborative Innovation Center for Eco-environmental Improvement With Forestry and Fruit Trees，Beijing 100000)

Keywords:: Ziziphus jujuba Mill.‘Dongzao’; variant; fruit; phenological period

Abstract:: Ziziphus jujuba Mill.‘Dongzao’ and its five natural variants were taken as materials,comparisons of fruit morphology,fruit nutrition,phonological period,chromosome ploidy and DNA fingerprint were carried out,in order to selecte the variation type of ‘Dongzao’ with excellent comprehensive charaters.The results showed that compared with ‘Dongzao’,the variant No.1 had significantly bigger fruits with the single fruit weight of 25.22 g and higher soluble sugar content and acid-sugar ratio.The phonological period of variation No.1 and No.2 was similar to that of ‘Dongzao’,yet other three variants fruits matured 15 days later than ‘Dongzao’.All the five natural variants were diploidy according to flow cytometry analysis.No difference of DNA fingerprint among ‘Dongzao’ and five natural variants were observed using 15 pairs of SSR primers,which indicated that the five variants were the most probably bud mutations from ‘Dongzao’.The evaluation demonstrated that the variant No.1 was a big fruit type and the variant No.3,No.4 and No.5 belonged to late-maturing fruit type.