Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Characteristics of the Complete Chloroplast Genome of <i>Pourthiaea</i> (Rosaceae) and Its Comparative Analysis
oleh: Zhengying Cao, Wenzhi Zhao, Yaxuan Xin, Weixiang Shen, Fei Wang, Qishao Li, Yuxiang Tu, Haorong Zhang, Zhanghong Dong, Peiyao Xin
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-12-01 |
Deskripsi
<i>Pourthiaea</i> is of great ornamental value because it produces white flowers in spring and summer, red fruit in autumn, and their fruit does not fall in winter. In order to explore the genetic structure and evolutionary characteristics of the chloroplast genome of <i>Pourthiaea</i>, comparative genomics analysis and phylogenetic analysis were conducted using ten published chloroplast genomes of <i>Pourthiaea</i> from the NCBI database. The results showed that the chloroplast genomes of the ten species of <i>Pourthiaea</i> showed typical circular tetrad structures, and the genome sizes were all within the range of 160,159–160,401 bp, in which the large single copy was 88,047–88,359 bp, the small single copy was 19,234–19,338 bp, and the lengths of a pair of inverted repeats were 26,341–26,401 bp. The GC contents ranged from 36.5% to 36.6%. A total of 1017 SSR loci were identified from the chloroplast genomes of the ten species of <i>Pourthiaea</i>, including six types of nucleotide repeats. The gene types and gene distribution of the IR boundary regions of the chloroplast genomes of different species of <i>Pourthiaea</i> were highly conservative, with little variation. Through the sequence alignment of chloroplast genomes, it was found that the chloroplast genomes of the ten species of <i>Pourthiaea</i> were generally highly conservative. The variation mainly occurred in the spacer regions of adjacent genes. Through nucleic acid diversity analysis, three hypervariable regions were screened at Pi > 0.006, namely <i>trnQ(UUC)-psbk-psbl</i>, <i>accD-psal</i>, and <i>ndhF-rpl32-trnL (UAG)</i>. Phylogenetic analysis showed that the ten species of the genus <i>Pourthiaea</i> were clustered in the same branch and formed sister groups with the genus <i>Stranvaesia</i>, and that the support rate for the monophyly of the genus <i>Pourthiaea</i> was high. This study can serve as a reference for the breeding, genetic evolution, and phylogeny of <i>Pourthiaea</i>.