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Sci Rep. 2017 Jun 23;7(1):4192. doi: 10.1038/s41598-017-04613-9.

Differentiating Thamnocalamus Munro from Fargesia Franchet emend. Yi (Bambusoideae, Poaceae): novel evidence from morphological and neural-network analyses.

Author information

1
College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China.
2
College of Agriculture, Food and Natural Resources, University of Missouri, Columbia, MO, USA.
3
Centre for Medical Diagnostic and Research, Motilal Nehru national Institute of Technology, Allahabad, India.
4
College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China. 610245498@qq.com.
5
College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China. cqb@sicau.edu.cn.

Abstract

Fargesia Franchet emend. Yi is closely allied with Thamnocalamus Munro but differs in many major morphological characteristics. Based on traditional morphological characters, it is difficult to differentiate these two genera. The current study measured 19 species in these two genera to determine whether variations in 12 categories of major characters are continuous. In addition, a self-organizing map (SOM) and cluster analysis were used together to reveal whether the known species of Fargesia represent discontinuous sampling of Thamnocalamus. The results show that 46 morphological characteristics exhibited high variation at the generic and species levels. In addition, the cluster analysis showed that 32 morphological characteristics of Thamnocalamus and Fargesia were divided between two species and well separated from the outgroup. Additionally, significant differences (P < 0.01) were observed in the reproductive structures between these two genera. The unrooted dendrogram, which was based on the SOM neural network, shows the same results as the cluster analysis of morphological characteristics. These data indicate that Fargesia is not a result of discontinuous sampling of Thamnocalamus; thus, Fargesia should not be treated as a synonym for Thamnocalamus.

PMID:
28646152
PMCID:
PMC5482892
DOI:
10.1038/s41598-017-04613-9
[Indexed for MEDLINE]
Free PMC Article

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