The genome sequencing and comparative analysis of a wild kiwifruit Actinidia eriantha  

作　　者：Xiaohong Yao Shuaibin Wang Zupeng Wang Dawei Li Quan Jiang Qiong Zhang Lei Gao Caihong Zhong Hongwen Huang Yifei Liu 

机构地区：[1]Key Laboratory of Plant Germplasm Enhancement and Specially Agriculture,Wuhan Botanical Garden,the Chinese Academy of Sciences,Wuhan 430074,China [2]Department of Bioinformatics,College of Life Sciences,Zhejiang University,Hangzhou 310058,China [3]College of Life Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]Lushan Botanical Garden,Chinese Academy of Sciences,Jiujiang 332900,China [5]College of Pharmacy,Hubei University of Chinese Medicine,Wuhan 430065,China

出　　处：《Molecular Horticulture》2022年第1期172-185,共14页分子园艺（英文）

基　　金：This study was supported by the National Key Research and Development Program of China(Grant No.2018YFD1000105);the National Natural Science Foundation of China(31870198 and 31770374).

摘　　要：The current kiwifruit industry is mainly based on the cultivars derived from the species Actinidia chinensis(Ac)which may bring risks such as canker disease.Introgression of desired traits from wild relatives is an important method for improving kiwifruit cultivars.Actinidia eriantha(Ae)is a particularly important taxon used for hybridization or introgressive breeding of new kiwifruit cultivars because of its valued species-specific traits.Here,we assembled a chromosome-scale high-quality genome of a Ae sample which was directly collected from its wild populations.Our analysis revealed that 41.3%of the genome consists of repetitive elements,comparable to the percentage in Ac and Ae cultivar“White”genomes.The genomic structural variation,including the presence/absence-variation(PAV)of genes,is distinct between Ae and Ac,despite both sharing the same two kiwifruit-specific whole genome duplication(WGD)events.This suggests that a post-WGD divergence mechanism occurred during their evolution.We further investigated genes involved in ascorbic acid biosynthesis and disease-resistance of Ae,and we found introgressive genome could contribute to the complex relationship between Ae and other representative kiwifruit taxa.Collectively,the Ae genome offers valuable genetic resource to accelerate kiwifruit breeding applications.

关 键 词：KIWIFRUIT GENOME Evolution Vitamin C Disease resistance Introgression breeding 

分 类 号：S663.4[农业科学—果树学]