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Evolutionary patterns in the Torilidinae inferred from ITS sequences
Author(s) -
Lee ByoungYoon
Publication year - 2003
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.2003.tb00383.x
Subject(s) - biology , bristle , appendage , monophyly , pollen , genus , botany , internal transcribed spacer , evolutionary biology , ribosomal dna , ribosomal rna , phylogenetics , anatomy , genetics , clade , gene , brush , electrical engineering , engineering
Evolutionary patterns of selected characters among 17 representatives of subtribe Torilidinae of family Apiaceae were investigated by comparative sequencing of the two internal transcribed spacers of the 18s‐26s nuclear ribosomal DNA repeat. Distribution of several palynological, cytological, morphological, and cotyledon characters reveals that many of these features are highly homoplastic. Base chromosome number of x=6 is not suggestive of monophyly of the genus Torilis. Features derived from secondary (vallecular) appendages of hits do not seem to be usekl characters for delimiting generic boundaries. Bristles on the primary ridges of fruits are ancestral within the subtribe; curved bristles and spines emerged. Characters of cotyledons and pollen grains support the generic relationships between Lisaea and Turgenia.