Eighteen representative species were selected from all the nine sections of
Chinese Allium on the basis of the classification of morphology and cytota
xonomy. The trnK and rpL16 gene fragments of chloroplast DNA were amplified
from 18 species by PCR method. The two cpDNA fragments were digested by 26
restriction enzymes, and 303 polymorphic restriction sites were found, of
which 163 were informative. The restriction site data were analyzed with PA
UP (version 3.1.1) and MEGA (version 1.01) as well as PHYLIP. As a result,
the genus Allium could be classified into six subgenera, The recognition of
Sect. Anguinum in the Flora of China is reasonable, Sect. Rhizirideum, Sec
t. Haplostemon and Sect, Cepa are not monophyletic. The infrageneric system
of this genus was also discussed.