PJB-2018-780
Camellia hainanica (Theaceae) a new species from Hainan, supported from morphological characters and phylogenetic analysis
Xu Zhenggang, Yuan Deyi, Tang Yongcheng, Wu Liang and Zhao Yunlin
Abstract
An unusual Camellia specimen was noticed during field investigations in Hainan Island. In order to identify the phylogenetic position, the complete chloroplast genome sequences and the DNA barcode gene, matk, of the new species and closely related species were employed. The results confirmed that the new species belonged to Camellia section and had close genetic relationship with C. gauchowensis, C. crapnelliana, C. vietnamensis. The general morphology characters of the new plant species, Camellia hainanica YL Zhao et ZG Xu, sp. nov. were described. The pollen microstructure was studied by scanning electron microscope, then above features were compared with closely phylogenetic related Camellia species. Although morphological details were most similar to C. oleifera, the new species have larger fruit and brown rough pericarp. At the same time, the new species can be differentiated by its morphological characters, such as branchlets, bracteoles, stamens and fruit from other related species. All evidences from the characters of morphology, pollen and molecular phylogeny indicated that the plant was a new species and belonged to Camellia sect. Oleifera.
To Cite this article:
Zhenggang, X., Y. Deyi, T. Yongcheng, W. Liang and Z. Yunlin. 2020. Camellia hainanica (Theaceae) a new species from Hainan, supported from morphological characters and phylogenetic analysis. Pak. J. Bot., 52(3): DOI: http://dx.doi.org/10.30848/PJB2020-3(31)
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