A high-quality Bougainvillea genome provides new insights into evolutionary history and pigment biosynthetic pathways in the Caryophyllales  

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作  者:Lan Lan Huiqi Zhao Suxia Xu Shenglong Kan Xiaoni Zhang Weichao Liu Xuezhu Liao Luke RTembrock Yonglin Ren Wayne Reeve Jun Yang Zhiqiang Wu 

机构地区:[1]Shenzhen Branch,Guangdong Laboratory of Lingnan Modern Agriculture,Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs,Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen,518120,China [2]School of Medical,Molecularand Forensic Sciences,Murdoch University,6150,Western Australia,90 South Street,Murdoch,Australia [3]Kunpeng Institute of Modern Agriculture at Foshan,Shenzhen Branch,Guangdong Laboratory of Lingnan Modern Agriculture,Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen 518124,China [4]Sanya Institute,Hainan Academy of Agricultural Sciences,Sanya,572025,China [5]Institute of Tropical Horticulture Research,Hainan Academy of Agricultural Sciences,Haikou,571100,China [6]Fujian Key Laboratory of Subtropical Plant Physiology&Biochemistry,Fujian Institute of Subtropical Botany,Xiamen,361006,China [7]Key Laboratory of Horticultural Plant Biology,College of Horticulture and Forestry Sciences,Huazhong Agricultural University,Wuhan,430070,China [8]Department of Agricultural Biology,Colorado State University,Fort Collins,CO,80523,USA

出  处:《Horticulture Research》2023年第8期85-96,共12页园艺研究(英文)

基  金:This research was supported by Nanfan special project,CAAS(grant no.SWAQ06);the Funding of Major Scientific Research Tasks,Kunpeng Institute of Modern Agriculture at Foshan(KIMA-ZDKY2022004);Key R&D Project of Hainan Province(ZDYF2022XDNY254);the Scientific Research Foundation for Principle Investigator,Kunpeng Institute of Modern Agriculture at Foshan(KIMA-QD2022004);the Chinese Academy of Agricultural Sciences Elite Youth Program(110243160001007);to Z.W.,Science Technology and Innovation Commission of Shenzhen Municipality of China(ZDSYS20200811142605017);the National Natural Science Foundation of China(32071786).

摘  要:Bougainvillea is a perennial ornamental shrub that is highly regarded in ornamental horticulture around the world.However,the absence of genome data limits our understanding of the pathways involved in bract coloration and breeding.Here,we report a chromosome-level assembly of the giga-genome of Bougainvillea×buttiana‘Mrs Butt’,a cultivar thought to be the origin of many other Bougainvillea cultivars.The assembled genome is∼5 Gb with a scaffold N50 of 151756278 bp and contains 86572 genes which have undergone recent whole-genome duplication.We confirmed that multiple rounds of whole-genome multiplication have occurred in the evolutionary history of the Caryophyllales,reconstructed the relationship in the Caryophyllales at whole genome level,and found discordance between species and gene trees as the result of complex introgression events.We investigated betalain and anthocyanin biosynthetic pathways and found instances of independent evolutionary innovations in the nine different Caryophyllales species.To explore the potential formation mechanism of diverse bract colors in Bougainvillea,we analyzed the genes involved in betalain and anthocyanin biosynthesis and found extremely low expression of ANS and DFR genes in all cultivars,which may limit anthocyanin biosynthesis.Our findings indicate that the expression pattern of the betalain biosynthetic pathway did not directly correlate with bract color,and a higher expression level in the betalain biosynthetic pathway is required for colored bracts.This improved understanding of the correlation between gene expression and bract color allows plant breeding outcomes to be predicted with greater certainty.

关 键 词:evolutionary INSIGHT breeding 

分 类 号:S68[农业科学—观赏园艺]

 

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