Taxonomic reconsideration of Chinese Lespedeza maximowiczii (Fabaceae) based on morphological and genetic features, and recommendation as the independent species L-pseudomaximowiczii
Taxonomic reconsideration of Chinese Lespedeza maximowiczii (Fabaceae) based on morphological and genetic features, and recommendation as the independent species L-pseudomaximowiczii
复制标题
DOI：
10.11110/kjpt.2018.48.3.153
复制
发表时间：
2018-09-01
影响因子：
1
通讯作者：
Choi, Byoung-Hee
中科院分区：
文献类型：
--
作者：
Jin, Dong-Pil;Xu, Bo;Choi, Byoung-Hee
胡枝子 C. K. Schneid。 （豆科）是一种落叶灌木，已知分布于中国、韩国和日本对马岛的温带森林。由于物种内严重的形态差异，对韩国 L. maximowiczii 进行了大量检查。然而，尽管对中国植物的分类存在疑问，但其形态尚未得到彻底研究。为了澄清这个分类问题，我们研究了形态特征并利用微卫星标记进行了贝叶斯聚类分析。中国个体的形态和遗传特征与韩国生长的典型 L. maximowiczii 存在很大差异。例如，前者的花瓣形状不同，有长爪，萼裂片中部以上分叉，小叶上表面被柔毛。它们的圆柱状芽和螺旋排列的芽鳞与 Heterolespedeza 系列/组中的芽鳞不同，其中包括 L. maximowiczii。我们的贝叶斯聚类分析还包括 L. buergeri 作为外群。这些结果表明，中国样本聚集成与 L. maximowiczii 分离的谱系（最佳簇，K = 2），尽管后者与 L. buergeri 属于同一谱系。因此，我们将这些中国植物视为一个新种，命名为L.pseudomaximowiczii。
Lespedeza maximowiczii C. K. Schneid. (Fabaceae) is a deciduous shrub which is known to be distributed in the temperate forests of China, Korea and on Tsushima Island of Japan. Due to severe morphological variations within species, numerous examinations have been conducted for Korean L. maximowiczii. However, the morphology of Chinese plants has not been studied as thoroughly, despite doubts about their taxonomy. To clarify this taxonomic issue, we investigated morphological characters and undertook a Bayesian clustering analysis with microsatellite markers. The morphological and genetic traits of Chinese individuals varied considerably from those of typical L. maximowiczii growing in Korea. For example, petals of the former had a different shape and bore long claws, while the calyx lobes were diverged above the middle and the upper surface of the leaflet was pubescent. Their terete buds and spirally arranged bud scales were distinct from those within the series/section Heterolespedeza, which includes L. maximowiczii. Our Bayesian clustering analysis additionally included L. buergeri as an outgroup. Those results indicated that the Chinese samples clustered into a lineage separated from L. maximowiczii (optimum cluster, K = 2), despite the fact that the latter is grouped into the same lineage with L. buergeri. Therefore, we treat those Chinese plants as a new species with the name L. pseudomaximowiczii.