文献类型： 外文期刊

作者： Li, Fangping ¹ ; Hou, Zhuangwei ¹ ; Xu, Shiqiang ¹ ; Han, Danlu ⁵ ; Li, Bin ¹ ; Hu, Haifei ⁶ ; Liu, Jieying ² ; Cai, Shike ¹ ; Gan, Zhenpeng ² ; Gu, Yan ¹ ; Zhang, Xiufeng ² ; Zhou, Xiaofan ² ; Wang, Shaokui ² ; Zhao, Junliang ⁶ ; Mei, Yu ¹ ; Zhang, Jisen ⁹ ; Wang, Zefu ³ ; Wang, Jihua ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Crop Res Inst, Guangdong Prov Key Lab Crops Genet & Improvement, Guangzhou 510640, Peoples R China

2.South China Agr Univ, Guangdong Prov Key Lab Plant Mol Breeding, State Key Lab Conservat & Utilizat Subtrop Agrobio, Guangzhou 510642, Peoples R China

3.Nanjing Forestry Univ, Coll Ecol & Environm, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China

4.Chinese Acad Agr Sci, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr, Genome Anal Lab,Minist Agr,Agr Genom Inst Shenzhen, Shenzhen, Peoples R China

5.South China Normal Univ, Sch Life Sci, Guangdong Prov Key Lab Biotechnol Plant Dev, Guangzhou 510631, Peoples R China

6.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China

7.Guangdong Acad Agr Sci, Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China

8.Guangdong Acad Agr Sci, Guangdong Rice Engn Lab, Guangzhou 510640, Peoples R China

9.Guangxi Univ, State Key Lab Conservat & Utilizat Subtrop Agrobio, Nanning 530005, Peoples R China

关键词： Phyllanthaceae; chromosome-scale haplotype-resolved genome; octoploid species; speciation; polyploidization; hybridization

期刊名称：PLANT JOURNAL （ 影响因子：7.2； 五年影响因子：7.9 ）

ISSN： 0960-7412

年卷期： 2024 年

页码：

收录情况： SCI

摘要： The Phyllanthaceae family comprises a diverse range of plants with medicinal, edible, and ornamental value, extensively cultivated worldwide. Polyploid species commonly occur in Phyllanthaceae. Due to the rather complex genomes and evolutionary histories, their speciation process has been still lacking in research. In this study, we generated chromosome-scale haplotype-resolved genomes of two octoploid species (Phyllanthus emblica and Sauropus spatulifolius) in Phyllanthaceae family. Combined with our previously reported one tetraploid (Sauropus androgynus) and one diploid species (Phyllanthus cochinchinensis) from the same family, we explored their speciation history. The three polyploid species were all identified as allopolyploids with subgenome A/B. Each of their two distinct subgenome groups from various species was uncovered to independently share a common diploid ancestor (Ancestor-AA and Ancestor-BB). Via different evolutionary routes, comprising various scenarios of bifurcating divergence, allopolyploidization (hybrid polyploidization), and autopolyploidization, they finally evolved to the current tetraploid S. androgynus, and octoploid S. spatulifolius and P. emblica, respectively. We further discuss the variations in copy number of alleles and the potential impacts within the two octoploids. In addition, we also investigated the fluctuation of metabolites with medical values and identified the key factor in its biosynthesis process in octoploids species. Our study reconstructed the evolutionary history of these Phyllanthaceae species, highlighting the critical roles of polyploidization and hybridization in their speciation processes. The high-quality genomes of the two octoploid species provide valuable genomic resources for further research of evolution and functional genomics. Our study reconstructed the evolutionary history of these Phyllanthaceae species, highlighting the critical roles of polyploidization and hybridization in their speciation processes.