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Use of chloroplast DNA polymorphisms for the phylogenetic study of the subgenera Amerallium and Bromatorrhiza (genus Allium )
Author(s) -
Samoylov A.,
Klaas M.,
Hanelt P.
Publication year - 1995
Publication title -
feddes repertorium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.24
H-Index - 25
eISSN - 1522-239X
pISSN - 0014-8962
DOI - 10.1002/fedr.19951060306
Subject(s) - subgenus , biology , chloroplast dna , upgma , phylogenetic tree , allium , dendrogram , botany , genus , taxon , phylogenetics , evolutionary biology , zoology , genetics , genetic diversity , genotype , gene , population , demography , sociology
Chloroplast DNA (cpDNA) variability has been examined in 16 Allium species of the subgenera Amerallium and Bromatorrhiza according to the recently accepted classification in order to test conflicting ideas of their taxonomic relationships. Combinations of ten restriction enzymes and nine heterologous cpDNA probes were used to identify more than 1000 restriction fragments, 197 of these were informative. A phenetic analysis was carried out, and the resulting UPGMA and Neighbour joining dendrograms allow us to divide the 16 species into two groups. The first one includes species of several American sections of subg. Ameraltium , the second group combines all Old World species of subg. Amerallium and subg. Bromatorrhiza. The Bromatorrhiza accessions are interspersed among the typical Ameralliums and are separated from one another, thus confirming the artificial character of this group, which had to be dissolved and incorporated into subg. Amerallium. Two species of the former subg. Bromatorrhiza cluster with the South‐European sects. Briseis and Narkissoprason , whereas the two other species with a basic chromosome number x = 8 are rather isolated within subg. Amerallium. These E Himalayan–SW Chinese plants take an intermediate position between the two large x = 7 and x = 8 subgroups of Allium , suggesting a key role for them as a basic group in the diversification process of the genus.