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

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Horticulture Research 2023年第8期10卷 85-96页

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 Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen518120China School of Medical Molecularand Forensic SciencesMurdoch University6150Western Australia90 South StreetMurdochAustralia Kunpeng Institute of Modern Agriculture at Foshan Shenzhen BranchGuangdong Laboratory of Lingnan Modern AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518124China Sanya Institute Hainan Academy of Agricultural SciencesSanya572025China Institute of Tropical Horticulture Research Hainan Academy of Agricultural SciencesHaikou571100China Fujian Key Laboratory of Subtropical Plant Physiology&Biochemistry Fujian Institute of Subtropical BotanyXiamen361006China Key Laboratory of Horticultural Plant Biology College of Horticulture and Forestry SciencesHuazhong Agricultural UniversityWuhan430070China Department of Agricultural Biology Colorado State UniversityFort CollinsCO80523USA

Bougainvillea is a perennial ornamental shrub that is highly regarded in ornamental horticulture around the ***,the absence of genome data limits our understanding of the pathways involved in bract coloration and ***,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 *** assembled genome is∼5 Gb with a scaffold N50 of 151756278 bp and contains 86572 genes which have undergone recent whole-genome *** 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 *** investigated betalain and anthocyanin biosynthetic pathways and found instances of independent evolutionary innovations in the nine different Caryophyllales *** 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 *** 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 *** 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

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