Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (10): 2063-2074.doi: 10.16420/j.issn.0513-353x.2021-0701

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A Review and Perspective for Citrus Breeding in China During the Last Six Decades

DENG Xiuxin()   

  1. Key Laboratory of Horticultural Plant Biology,Ministry of Education,College of Horticulture & Forestry Sciences,Huazhong Agricultural University,Wuhan 430070,China
  • Received:2022-07-05 Revised:2022-08-25 Online:2022-10-25 Published:2022-10-31
  • Contact: DENG Xiuxin


Citrus genetic improvement has achieved a great progress during the last six decades in China. A repository harboring more than 1 700 accessions of Rutaceae in Chongqing and an embryogenic callus collection including more than 100 varieties in Wuhan have been established,respectively. Continuing exploration of citrus germplasm resulted in the identification of wild Daoxian tangerine,Honghe papeda and the mini-citrus,a mono-embryonic Hongkong kumquat for functional genmics research. A new type of rootstock,Ziyang Xiangcheng(Citrus junos)has been utilized in Chinese citrus industry. A total of 122 citrus varieties including 121 for scion and one for rootstock have been registered or protected by PVP. Out of the scion varieties,88.5% is from the natural mutation including the bud-sport and chance seedling variation,and the rest from artifically created mutants,such as the irradiation,hybridization and protoplast fusion etc. These varieties covered nearly all types of citrus,including loose-skin mandarin,sweet orange and pummelo etc,with improved seedlessness,mature season and fruit color etc. The omics technologies have been widely used in citrus genetic improvement in China. Genomes including sweet orange and other main citrus species have been sequenced and assembled during the recent decade,as has accelerated cloning of the key genes controlling import agronomic traits,such as the polyembryonic related gene CitRWP etc. Genetic transformation and gene editing are also setup in Citrus. These achievments have laid a solid base for citrus genome-design breeding for the future.

Key words: citrus, germplasm, genetic improvement, breeding, varity, genomics

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