Chloroplast Genome Profiling and Phylogenetic Insights of the "Qixiadaxiangshui" Pear (Pyrus bretschneideri Rehd.1)
文献类型： 外文期刊
作者： Jiao, Huijun 1 ; Chen, Qiming 1 ; Xiong, Chi 2 ; Wang, Hongwei 1 ; Ran, Kun 1 ; Dong, Ran 1 ; Dong, Xiaochang 1 ; Guan, Qiuzhu 1 ; Wei, Shuwei 1 ;
作者机构： 1.Shandong Inst Pomol, Longtan Rd 66, Tai An 271000, Peoples R China
2.Huaiyin Inst Technol, Meicheng East Rd 1, Huaian 223001, Peoples R China
3.Natl Ctr Technol Innovat Comprehens Utilizat Salin, Zhihui Rd 8, Dongying 257335, Peoples R China
关键词： "Qixiadaxiangshui" pear; chloroplast genome; comparative genome analysis; phylogenetic analysis
期刊名称：HORTICULTURAE （ 影响因子：3.1； 五年影响因子：3.1 ）
ISSN：
年卷期： 2024 年 10 卷 7 期
页码：
收录情况： SCI
摘要： The "Qixiadaxiangshui" pear (Pyrus bretschneideri Rehd.1) is a highly valued cultivar known for its crisp texture, abundant juice, and rich aroma. In this study, we reported the first complete chloroplast genome sequence of the "Qixiadaxiangshui" pear, which is 159,885 bp in length with a GC content of 36.58%. The genome exhibits a typical circular quadripartite structure, comprising a large single-copy region (LSC), a small single-copy region (SSC), and a pair of inverted repeat regions (IRs). A total of 131 genes were identified, including 84 protein-coding genes, 8 rRNA genes, and 37 tRNA genes. We also identified 209 simple sequence repeats (SSRs) and several mutation hotspots, such as ndhC-trnM-CAU and trnR-UCU-atpA, which can be applied in molecular identification and phylogenetic studies of Pyrus. Comparative genomic analysis showed high conservation among ten pear cultivars. Phylogenetic analysis indicated that the "Qixiadaxiangshui" pear is closely related to germplasm Dangshansuli, Wonwhang, and Yali, suggesting a recent common ancestor. These findings provided valuable insights into the genetic diversity and evolutionary dynamics of the Pyrus species and contribute to the conservation and breeding of pear germplasm resources.
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