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Journal article
A high-quality Bougainvillea genome provides new insights into the evolutionary history and pigment biosynthetic pathways in the Caryophyllales
Horticulture research, Vol.10(8), uhad124
2023
Abstract
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 151 756 278 bp and contains 86 572 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.
Details
- Title
- A high-quality Bougainvillea genome provides new insights into the evolutionary history and pigment biosynthetic pathways in the Caryophyllales
- Authors/Creators
- Lan Lan - Agricultural Genomics Institute at ShenzhenHuiqi Zhao - Sanya UniversitySuxia Xu - Fujian Institute of Subtropical BotanyShenglong Kan - Agricultural Genomics Institute at ShenzhenXiaoni Zhang - Agricultural Genomics Institute at ShenzhenWeichao Liu - Agricultural Genomics Institute at ShenzhenXuezhu Liao - Agricultural Genomics Institute at ShenzhenLuke R Tembrock - Colorado State UniversityYonglin Ren - Murdoch UniversityWayne Reeve - Murdoch UniversityJun Yang - Sanya UniversityZhiqiang Wu - Agricultural Genomics Institute at Shenzhen
- Publication Details
- Horticulture research, Vol.10(8), uhad124
- Publisher
- Oxford Academic
- Identifiers
- 991005592637107891
- Copyright
- © 2023 The Author(s).
- Murdoch Affiliation
- Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.54 Molecular & Cell Biology - Genetics
- 1.54.1543 Flow Cytometry
- Web Of Science research areas
- Genetics & Heredity
- Horticulture
- Plant Sciences
- ESI research areas
- Agricultural Sciences