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The impact of multiple molecular and morphological data sets on the phylogenetic reconstruction of subtribe Neurachninae (Poaceae: Panicoideae: Paniceae).
- Source :
-
Australian Systematic Botany . 2021, Vol. 34 Issue 3, p227-251. 25p. - Publication Year :
- 2021
-
Abstract
- The taxonomy of Neurachninane has been unstable, with its member genera consisting of Ancistrachne , Calyptochloa , Cleistochloa , Dimorphochloa , Neurachne , Paraneurachne and Thyridolepis , changing since its original circumscription that comprised only the latter three genera. Recent studies on the phylogeny of Neurachninae have focused primarily on molecular data. We analysed the phylogeny of Neurachninae on the basis of molecular data from seven molecular loci (plastid markers: mat K, ndh F, rbc L, rpl 16, rpo C2 and trn LF, and ribosomal internal transcribed spacer, ITS) and morphological data from 104 morphological characters, including new taxonomically informative micromorphology of upper paleas. We devised an impact assessment scoring (IAS) protocol to aid selection of a tree for inferring the phylogeny of Neurachninae. Combining morphological and molecular data resulted in a well resolved phylogeny with the highest IAS value. Our findings support reinstatement of subtribe Neurachninae in its original sense, Neurachne muelleri and Dimorphochloa rigida. We show that Ancistrachne , Cleistochloa and Dimorphochloa are not monophyletic and Ancistrachne maidenii , Calyptochloa , Cleistochloa and Dimorphochloa form a new group, the cleistogamy group, united by having unique morphology associated with reproductive dimorphism. This study of native Australian grasses shows the impact on results from analyses of multiple datasets. The study builds on previous work using an expanded set of DNA sequences and a more comprehensive study of the morphology of seed heads to show new species, new genera and a new classification for a group of grasses defined by sharing a rare and distinct breeding system. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHYLOGENY
*MORPHOLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 10301887
- Volume :
- 34
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Australian Systematic Botany
- Publication Type :
- Academic Journal
- Accession number :
- 150228386
- Full Text :
- https://doi.org/10.1071/SB20015