The complete chloroplast genome of Cucumis anguria var. anguria ( Cucurbitaceae ) and its phylogenetic implication.

The genus Cucumis contains 52 species, including two economically significant crops, cucumber and melon, as well as other important species. Cucumis anguria var. anguria is a wild relative of C. melon , native to Africa. Cucumis anguria is rich in vitamins and minerals in gherkin fruits and carries broad-spectrum resistance to multiplex biotic and abiotic stress, such as powdery mildew, fusarium wilt, and meloidogyn incognita. Cucumis anguria provides a valuable gene pool for crop improvement of Cucumis crops. In this study, the complete chloroplast (cp) genome sequence of C. anguria was determined using next-generation sequencing. The entire cp genome was determined to be 156,577 bp in length. It contained large single-copy (LSC) and small single-copy (SSC) regions of 85,971 and 18,100 bp, respectively, which were separated by a pair of 26,253 bp inverted repeat (IR) regions. The genome contained 134 genes, including 88 protein-coding genes, 37 tRNA genes, 8 rRNA genes and 1 pseudogene infA. The overall GC content of the genome is 37.0%. A phylogenetic tree reconstructed by 48 chloroplast genomes reveals that C. anguria is a separate branch in Cucumis .
Competing Interests: No potential conflict of interest was reported by the authors.
(© 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)