Chromosomal-level genome of macadamia(Macadamia integrifolia)  

作　　者：Chengcai Xia Sirong Jiang Qiujin Tan Wenquan Wang Long Zhao Chenji Zhang Yuting Bao Qi Liu Jianjia Xiao Ke Deng Miaohua He Pengliang An Wenlin Wang Meiling Zou Zhiqiang Xia 

机构地区：[1]Sanya Nanfan Research Institute of Hainan University,Hainan Yazhou Bay Seed Laboratory,Sanya 572025,China [2]College of Tropical Crops,Hainan University,Haikou 570288,China [3]Guangxi South Subtropical Agricultural Science Research Institute,Longzhou 532415,China [4]Academy of Agriculture and Forestry Sciences,Qinghai University,Xining 810016,China [5]College of Agriculture,China Agricultural University,Beijing 100083,China

出　　处：《Tropical Plants》2022年第1期13-21,共9页热带植物（英文刊）

基　　金：supported by Guangxi Natural Science Foundation under Grant No.2019GXNSFBA18501.

摘　　要：Macadamia from the family Proteaceae is a plant native to Australia and has long been favoured by people for its crispy and high nutritional and medicinal value.Here,the genome of GUIRE 1(GR1),a highly heterozygous superior cultivar of macadamia nut,was sequenced and assembled using nanopore sequencing,and a 807-Mb genome(contig N50,1.9 Mb;scaffold N50,54.70 Mb)and 14 chromosomes were obtained.A total of 453 Mb(about 55.95%)repetitive sequences and 37,657 protein-coding genes were obtained by gene annotation and homologous protein comparison.Proteaceae diverged from Nelumbonaceae nearly 115.37 million years ago and from Rubiaceae about 140 million years ago.A genome-wide duplication(WGD)event occurred in macadamia 41 million years ago based on the WGD analysis.The functional enrichment analysis of M.integrifolia-specific gene families revealed their roles in signal transduction,protein phosphorylation,protein binding,and defense response.Here,a highly heterozygous genome of M.integrifolia was unlocked to provide a database for breeding and molecular mechanism research.

关 键 词：BREEDING analysis. integrifolia 

分 类 号：Q94[生物学—植物学]