The complete chloroplast genome sequence of Vitis berlandieri

Abstract Vitis berlandieri, a species of grape native to the southern North America, is known for good tolerance against soils with a high content of lime and was almost used for rootstock breeding. Here, we report the complete chloroplast genome of V. berlandieri. The chloroplast genome was 161,028 bp in length, harboring a large single-copy region (89,228 bp) and a small single-copy region (19,028 bp) separated by two inverted repeat regions. A total of 130 unique genes were identified from this genome, including 85 protein-coding genes (PCGs), 37 tRNA genes, and 8 rRNA genes. Chloroplast phylogenetic analysis revealed that V. berlandieri is closely related to V. cordifolia.

Vitis berlandieri was usually used as a breeding partner in rootstock to improve the adaptation of the rootstock to lime soils (Schmid et al. 2009). Many rootstocks currently used in production, such as '1103P' and 'Richter 110', were obtained from the cross between V. berlandieri and other varieties of rootstocks (Mazzitelli and Schubert 1990;Thomas et al. 2008). However, the phylogenetic relationship between V. berlandieri and other Vitis species are still uncertain. Thus, we sequenced the complete chloroplast genome of V. berlandieri to elucidate its phylogenetic position in the family.
The fresh leaves of V. berlandieri were collected from Research Vineyard for Grape Germplasm and Breeding in Zhejiang Academy of Agricultural Science, Xucun Town, Haining City, Zhejiang Province, China (120 24 0 15 00 E; 30 26 0 15 00 N). Total genome DNA was extracted with the slightly modified CTAB method (Qu et al. 1996). The voucher specimens of V. berlandieri were deposited in the Herbarium of the Institute of Horticulture, Zhejiang Academy of Agricultural Sciences (Accession number: ZAAS-XJ-20-06). DNA library was sequenced, and 150 pb paired-end reads were generated on an Illumina NovaSeq 6000 platform (Illumina Inc., San Diego, CA, USA). The 11.9 Gb sequence clean reads were assembled using NOVOPlasty v3.8.3 (Nicolas et al. 2016) with the reference chloroplast genome of V. vinifera (GenBank: DQ424856). The chloroplast genome annotation and prediction were conducted using BLAST 2.6.0þ and GeSeq package, respectively (Michael et al. 2017).
The complete chloroplast genome of V. berlandieri (GenBank: MT604110) is 161,028 bp in length, and has a typical quadripartite construction, which contains two inverted repeat regions (IRA and IRB) of 52,772 that is insulated by a large single-copy (LSC; 89,228 bp) and a small single-copy region (SSC; 19,028 bp). The total GC content of complete chloroplast genome, LSC, SSC, IR region is 35.32%, 42.95%, 31.64%, respectively. The genome contained a total of 130 unique genes, including 85 protein-coding genes (PCGs), 37 tRNA genes, and 8 rRNA genes. Most of these genes are single copy genes. However, 6 PCGs, 7 tRNAs, and 4 rRNAs have two copies, and only one tRNA (trnM-CAU) has four copies.
To confirm the phylogenetic position of V. berlandieri within Vitaceae, the complete chloroplast genomes of 22 other grapevine species were downloaded from the NCBI GenBank database. The sequences were aligned using MAFFT v7 (Katoh et al. 2017), and then the maximum likelihood tree (Figure 1) was constructed by using MEGA X (Kumar et al. 2018). Phylogenetic analysis showed that V. berlandieri is closely related to V. cordifolia. The published V. berlandieri chloroplast genome provides useful information for phylogenetic and evolutionary studies in Vitaceae.

Disclosure statement
No potential conflict of interest was reported by the author(s).

Funding
This work was supported by the National Natural Science Foundation of China (Youth fund project, no. 31801822) and the Young Talent Training Program of Zhejiang Academy of Agricultural Sciences.

Data availability statement
The data that support the findings of this study are openly available in Genbank at https://www.ncbi.nlm.nih.gov/genbank/, reference number [MT604110], or available from the corresponding author.