Nature Communications (Aug 2023)

Genomic insight into domestication of rubber tree

  • Jinquan Chao,
  • Shaohua Wu,
  • Minjing Shi,
  • Xia Xu,
  • Qiang Gao,
  • Huilong Du,
  • Bin Gao,
  • Dong Guo,
  • Shuguang Yang,
  • Shixin Zhang,
  • Yan Li,
  • Xiuli Fan,
  • Chunyan Hai,
  • Liquan Kou,
  • Jiao Zhang,
  • Zhiwei Wang,
  • Yan Li,
  • Wenbo Xue,
  • Jiang Xu,
  • Xiaomin Deng,
  • Xiao Huang,
  • Xinsheng Gao,
  • Xiaofei Zhang,
  • Yanshi Hu,
  • Xia Zeng,
  • Weiguo Li,
  • Liangsheng Zhang,
  • Shiqing Peng,
  • Jilin Wu,
  • Bingzhong Hao,
  • Xuchu Wang,
  • Hong Yu,
  • Jiayang Li,
  • Chengzhi Liang,
  • Wei-Min Tian

DOI
https://doi.org/10.1038/s41467-023-40304-y
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 13

Abstract

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Abstract Understanding the genetic basis of rubber tree (Hevea brasiliensis) domestication is crucial for further improving natural rubber production to meet its increasing demand worldwide. Here we provide a high-quality H. brasiliensis genome assembly (1.58 Gb, contig N50 of 11.21 megabases), present a map of genome variations by resequencing 335 accessions and reveal domestication-related molecular signals and a major domestication trait, the higher number of laticifer rings. We further show that HbPSK5, encoding the small-peptide hormone phytosulfokine (PSK), is a key domestication gene and closely correlated with the major domestication trait. The transcriptional activation of HbPSK5 by myelocytomatosis (MYC) members links PSK signaling to jasmonates in regulating the laticifer differentiation in rubber tree. Heterologous overexpression of HbPSK5 in Russian dandelion (Taraxacum kok-saghyz) can increase rubber content by promoting laticifer formation. Our results provide an insight into target genes for improving rubber tree and accelerating the domestication of other rubber-producing plants.