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Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (3): 161-173.DOI: 10.11686/cyxb2023153

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Chloroplast genome characteristics of Physocarpus opulifolius ‘Diabolo’ and phylogenetic analysis of the subfamily Spiraeoideae

Xiang HUANG1(), Meng-yao HE1,2, Zi-xuan WANG1, Guang-ming CHU1, Ping JIANG1,2()   

  1. 1.College of Agriculture,Shihezi University,Shihezi 832003,China
    2.Xinjiang Production and Construction Corps Key Laboratory of Special Fruit and Vegetables Cultivation Physiology and Germplasm Resources Utilization,Shihezi 832003,China
  • Received:2023-05-09 Revised:2023-07-28 Online:2024-03-20 Published:2023-12-27
  • Contact: Ping JIANG

Abstract:

Physocarpus opulifolius ‘Diabolo’ is an ornamental flowering shrub that has been introduced into China from North America in recent years. The aims of this study were to determine the structural characteristics of the chloroplast genome of P. opulifolius ‘Diabolo’ and to clarify its taxonomic status within the subfamily Spiraeoideae. The chloroplast genome of P. opulifolius ‘Diabolo’ was sequenced on the Illumina NovaSeq 6000 sequencing platform, and the complete chloroplast genome was assembled and annotated. The chloroplast genome of P. opulifolius ‘Diabolo’ had a typical quadripartite structure, with a total length of 159131 bp, large single copy (LSC) length of 87582 bp, small single copy (SSC) length of 18829 bp, and inverted repeats a (IRa) and inverted repeats b (IRb) length of 26360 bp. A total of 130 genes were annotated, including 83 protein-coding genes, 8 ribosomal RNA (rRNA) genes, 37 transfer RNA (tRNA) genes, and 2 pseudogenes. Twelve codons (UUG, AUU, GUU, GUA, UAA, AAA, UCU, UCC, CCU, ACU, GCU, GGU) were determined. The codon usage bias was mainly affected by natural selection, and mutation was a weak influencing factor. Twenty-seven pairs of long sequence repeats and 87 simple sequence repeat loci were detected. The genes with high nucleotide polymorphism in the chloroplast genome of Physocarpus opulifolius ‘Diabolo’ were psbZtrnG (UCC), trnfM (CAU), trnH (GUG), psbArbcLrpl20 and rps12. The results of the phylogenetic analysis showed that Physocarpus is closely related to the genus Neillia.

Key words: Physocarpus opulifolius ‘Diabolo’, chloroplast genome, codon usage bias, phylogeny