LEE, HAE-LIM* and KI-JOONG KIM. Department of Biology, Yeungnam University, Kyongsan, Kyeungbuk, Korea 712-749. - Molecular phylogeny and character evolution of Jasminum (Oleaceae).
Jasminum is the largest genus in the family Oleaceae. The
species numbers are estimated from 150 to 450 depending on the
authors. Several species are widely cultivated in all over the world.
However, most species are distributed in Asian/African sub-/tropic
regions. The genus is traditionally classified into two groups,
section Alternifolia and the opposite-leaved group, based on the
arrangement of leaves. The opposite-leaved group further classified
into three sections; Unifoliolata, Pinnatifolia and Trifoliolata,
based on the number of leaflets. Recent molecular sequence data
suggest that the Menodora may include within Jasminum.
In order to evaluate the phylogenetic relationships between
Menodora and Jasminum and to estimate the evolutionary
directions of leaf character in Jasminum, we sequenced the
trnT-L-F regions (¡Ö1600bp) of chloroplast genome and nuclear
ITS regions (¡Ö700bp) from including 16 species of Menodora, 70
species of Jasminum, and 10 outgroup genera. Both nuclear ITS
and chloroplast trnT-L-F sequence data support the monophyly of
three major clades including Menodora, alternate-leaved
Jasminum and opposite-leaved Jasminum. The genus
Menodora was nested within Jasminum and form a sister
clade to the alternate-leaved Jasminum. Traditionary recognized
three sections within the opposite-leaved Jasminum were not
monophyletic and mixed each others in some species. The monophyly of
Menodora was further supported by an unique 300bp insertion
mutation in the chloroplast trnT-L noncoding region.
Key words: Biogeography, Jasminum, Leaf form evolution, Menodora, Molecular phylogeny, Oleaceae