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Sequencing and comparative analysis of the chloroplast genome of Ribes odoratum provide insights for marker development and phylogenetics in Ribes

文献类型： 外文期刊

作者： Wang, Le 1 ; Liang, Jian 1 ; Sa, Wei 1 ; Wang, Li 2 ;

作者机构： 1.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Peoples R China

2.Qinghai Univ, Qinghai Acad Agr Forestry Sci, Xining 810016, Peoples R China

3.Qinghai Key Lab Hulless Barley Genet & Breeding, Xining 810016, Peoples R China

4.Qinghai Plateau Key Lab Tree Genet & Breeding, Xining 810016, Qinghai, Peoples R China

关键词： Ribes odoratum; Chloroplast genome; Molecular marker; Phylogenomics

期刊名称：PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS （ 影响因子：2.391； 五年影响因子：2.836 ）

ISSN： 0971-5894

年卷期： 2021 年 27 卷 1 期

页码：

收录情况： SCI

摘要： Ribes odoratum, commonly known as clove currant, is a perennial deciduous shrub noted for its long-lasting fragrant flowers and edible fruits. Owing to its ornamental values, this species has been widely used in city gardening and urban landscaping. Here, the complete cp genome of R. odoratum was de novo assembled for the first time. The plastome is 157,152 bp in length, with a GC content of 38.2%. The cp genome featured a typical quadripartite structure, consisting of a pair of inverted repeat regions of 25,961 bp, separated by a large single copy region of 86,896 bp, and a small single copy region of 18,333 bp. A total of 131 genes were annotated in the plastome, including 86 protein coding genes, 37 tRNA genes, and 8 rRNA genes. 56 SSRs were identified, among which, 82.35% were located in the intergenic regions. A strong A/T bias in base composition was observed in these cpSSRs. In addition, 49 repeats of different sizes and types were also found in the plastome. Through comparison, seven divergence hotspots were identified between the cp genomes of R. odoratum and R. fasciculatum var. chinense. Sequences of these divergent regions could be developed as potential markers for species delimitation in further studies. We re-investigated the relationship aomong 32 Saxifragales species through plastome-based phylogenywhich revealed that R. odoratum as a sister of R. fasciculatum var. chinense. Thus, our study provides genomic resources and valuable reference for marker development and phylogenomics in Ribes.

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