The complete chloroplast genome sequence of Lithocarpus litseifolius (Hance) Chun 1837 (Fagaceae) and phylogenetic analysis

Lithocarpus litseifolius (Hance) Chun 1837 is an evergreen tree of Fagaceae, which can be used as sweet tea, natural sweetener, and precious medicinal material. The complete chloroplast genome of L. litseifolius was sequenced and its phylogenetic relationship was analyzed in this study. The chloroplast genome of L. litseifolius has a circular structure with a length of 161,322 bp, and it contains a pair of inverted repeat regions (IRs 25,897 bp), a large single copy (LSC 90,551 bp), and a small single copy (SSC 18,977 bp). There were 131 genes identified, including 37 tRNA, 8 rRNA, and 86 mRNA genes. Phylogenetic analysis of 23 species of Fagaceae indicated that Lithocarpus is monophyletic with strong bootstrap, and L. litseifolius is genetically closely related to Lithocarpus polystachyus.

木姜叶柯（Lithocarpus litseifolius (Hance) Chun 1837）是壳斗科（Fagaceae）常绿乔木，可作为甜茶、天然甜味剂及名贵药用原料。本研究对木姜叶柯的完整叶绿体基因组进行了测序，并分析了其系统发育关系。该叶绿体基因组呈环状结构，全长161322 bp，包含一对反向重复区（inverted repeat regions, IRs，长25897 bp）、一个大单拷贝区（large single copy, LSC，长90551 bp）以及一个小单拷贝区（small single copy, SSC，长18977 bp）。共鉴定出131个基因，其中包括37个转运RNA（tRNA）基因、8个核糖体RNA（rRNA）基因以及86个信使RNA（mRNA）基因。对23种壳斗科物种的系统发育分析结果表明，柯属（Lithocarpus）为单系类群且具有极高的自展支持率，木姜叶柯与多穗柯（Lithocarpus polystachyus）的遗传亲缘关系极为密切。