Characteristics chloroplast genome of Yangxincai and correction of its Latin scientific name

Yangxincai, a “highcalcium vegetable,” is a hybrid of Phedimus aizoon L. and Phedimus kamtschaticus (Fisch., 1840), historically misidentified as P. aizoon L. owing to their morphological similarity. Uncertainty regarding its parentage has impeded official nomenclature and caused confusion in research. To clarify its maternal origin, we sequenced and assembled its complete chloroplast genome, 151,666 bp in length with a GC content of 37.73%, comprising LSC 83,128 bp, SSC 16,704 bp, and a pair of IRs (25,917 bp). A total of 128 genes were annotated,including 84 proteincoding, 36 tRNA, and 8 rRNA genes. Phylogenetic analysis of the maternally inherited chloroplast genome confirmed P. aizoon as the maternal parent, and we propose the corrected name Phedimus aizoon × kamtschaticus for this hybrid cultivar.阳新菜是一种高钙蔬菜，为费菜（*Phedimus aizoon* L.）与堪察加费菜（*Phedimus kamtschaticus* (Fisch., 1840)）的杂交品种，因二者形态相似，历史上曾被误鉴定为费菜（*P. aizoon* L.）。其亲本归属的不确定性阻碍了官方命名工作，并给相关研究造成了混淆。为明确其母本来源，本研究对其完整叶绿体基因组进行了测序与组装：该基因组全长151,666 bp，GC含量为37.73%，包含大单拷贝区（Large Single Copy, LSC）83,128 bp、小单拷贝区（Small Single Copy, SSC）16,704 bp以及一对反向重复区（Inverted Repeat, IR，单段长度25,917 bp）。共注释得到128个基因，其中包括84个蛋白编码基因、36个转运RNA（Transfer RNA, tRNA）基因以及8个核糖体RNA（Ribosomal RNA, rRNA）基因。基于母系遗传的叶绿体基因组开展的系统发育分析证实，费菜（*P. aizoon* L.）为该杂交种的母本；据此，我们建议将该栽培杂交品种的校正名称定为*Phedimus aizoon* × *kamtschaticus*。