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Phylogenetic analysis of rbcL sequences identifies Acorus calamus as the primal extant monocotyledon.

Abstract：

:The identity of the oldest lineage of monocotyledons is a subject of debate. Alternative interpretations of morphological homologies are variously consistent with proposals that species of Alismatanae, Dioscoreales, or Melanthiales were the earliest descendants of the first monocotyledons. We present phylogenetic analyses based on DNA sequences of the plastid locus rbcL in which Acorus calamus, an herb with unspecialized floral features and of uncertain affinities, is supported as a member of the oldest extant lineage of monocotyledons. This conclusion is consistent with a substantial body of morphological, anatomical, and embryological evidence and offers an explanation for the failure to identify any close relationship between Acorus and other genera.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Duvall MR,Learn GH Jr,Eguiarte LE,Clegg MT

doi

10.1073/pnas.90.10.4641

subject

Has Abstract

pub_date

1993-05-15 00:00:00

pages

4641-4

issue

10

eissn

0027-8424

issn

1091-6490

journal_volume

90

pub_type

杂志文章

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