Allium section Bromatorrhiza is endemic to the Hengduan Mountain Region and neighboring areas. Its taxonomic circumscription and systematic position have been clarified by previous systematic works, but the infra-sectional taxonomic classification and interspecific relationships within the section are as yet unclear. Here, section Bromatorrhiza is cladistically analyzed based on 36 morphological characters using subgenus Amerallium species of circle-Mediterranean Region and North America as outgroups. The topology of the tree obtained is consistent with the results derived from molecular data. Sect. Bromatorrhiza and subg. Amerallium species of circle-Mediterranean Region form a good clade, suggesting more closely relationships between them. Within the section, its species are arranged into two obvious clades. One consists of A. fasciculatum (x = 10, two ovules) and all x = 11 species (one ovule), and the other clade (x = 7, two ovules) includes A. macranthum and A. wallichii. The results suggest that subsection Bromatorrhiza previously presented is artificial and should be cancelled. Combining the existed results, the present study suggests that sect. Bromatorrhiza comprises four independent evolutionary clades, viz. A. wallichii and its variety, A. macranthum, A. fasciculatum and all x = 11 species (including five species and one variety). Although subsection Uniovulatum formerly proposed is reasonable, we argue that a subdivision of section Bromatorrhiza seems unnecessary for such a relatively small number of species.
HU Chun-ya
,
JIANG Xiao-jun
,
WANG Yue-feng
,
CHEN Xu
,
HUANG De-qing
. Phylogenetic Relationship of Allium sect. Bromatorrhiza Inferred from Morphological Characters[J]. Subtropical Plant Science, 2018
, 47(04)
: 363
-369
.
DOI: 10.3969/j.issn.1009-7791.2018.04.011
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