A chromosome-level genome assembly for Chinese plum‘Wushancuili'reveals the molecular basis of its fruit color and susceptibility to rain-cracking  

作　　者：Kun Zhou Jingwen Wang Lin Pan Fang Xiang Yi Zhou Wei Xiong Ming Zeng Donald Grierson Wenbin Kong Lingyu Hu Wanpeng Xi 

机构地区：[1]College of Horticulture and Landscape Architecture,Southwest University,Chongqing 400715,China [2]Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River(Ministry of Education),Southwest University,Chongqing 400715,China [3]Department of Pomology,Chongqing Agricultural Technology Extension Station,Chongqing 401420,China [4]Plant and Crop Sciences Division,School of Biosciences,University of Nottingham,Sutton Bonington Campus,Loughborough LE125RD,UK [5]Wuxi Economical Crop Technology Extension Station,Chongqing 405800,China

出　　处：《Horticultural Plant Journal》2024年第3期672-688,共17页园艺学报（英文版）

基　　金：financially supported by the Construction Program for Chongqing's Distinctive“Wushancuili”Industry(Grant No.4322200370);Strategic Cooperation Project of Chongqing Municipality and Chinese Academy of Agricultural Sciences(Grant No.4322300181);Fundamental Research Funds for Central Universities-Talent induction project(Grant Nos.SWU-KR22001,SWU-KQ22070)。

摘　　要：Chinese plum(Prunus salicina Lindl.)originates from China and makes a large contribution to the global production of plums.The P.salicina‘Wushancuili'has a green coloration and high fruit quality and is economically important in eliminating poverty and protecting ecology in the Yangtze River Three Gorges Reservoir.However,rain-induced cracking(rain-cracking,literally skin cracking caused by rain)is a limitation to‘Wushancuili'fruit production and causes severe losses.This study reported a high-quality‘Wushancuili'genome assembly consisting of a 302.17-Mb sequence with eight pseudo-chromosomes and a contig N50 of 23.59 Mb through the combination of Illumina sequencing,Pacific Biosciences HiFiⅢsequencing,and high-throughput chromosome conformation capture technology.A total of 25109 protein-coding genes are predicted and 54.17%of the genome is composed of repetitive sequences.‘Wushancuili'underwent a remarkable orthoselection during evolution.Gene identification revealed that loss-of-function in four core MYB10 genes results in the anthocyanin deficiency and absence of red color,revealing the green coloration due to the residual high chlorophyll in fruit skin.Besides,the occurrence of cracking is assumed to be closely associated with cell wall modification and frequently rain-induced pathogen enrichment through transcriptomic analysis.The loss of MYB10 genes might render fruit more susceptible to pathogen-mediated cracking by weakening the epidermal strength and reactive oxygen species(ROS)scavenging.Our findings provided fundamental knowledge regarding fruit coloration and rain-cracking and will facilitate genetic improvement and cultivation management in Chinese plums.

关 键 词：Chinese plum Fruit coloration Fruit epidermis Genome MYB10 Rain-cracking 

分 类 号：S662.3[农业科学—果树学]