Donate to IAPT when you shop on Amazon

Unless otherwise specified, content on this website is licensed under Creative Commons CC-BY. Please see our Terms of Use for more information.

Plastome phylogenomics of sugarcane and relatives confirms the segregation of the genus Tripidium (Poaceae-Andropogoneae)

February 15, 2019

by Cassiano A. D. Welker, Michael R. McKain, Maria S. Vorontsova, Myriam C. Peichoto, Elizabeth A. Kellogg

Sugarcane (Saccharum officinarum) is one of the most important crops in the world and a major source of sugar for human consumption. Despite this immense value, the circumscription of the genus Saccharum is complex, contentious, and largely unresolved. Saccharum is accepted in a broad sense by some authors or split into various genera such as Erianthus and Tripidium by others. A plastome phylogenomic analysis of sugarcane and relatives was performed in order to investigate generic delimitation, with emphasis on Tripidium (= Erianthus sect. Ripidium). Our plastome analysis demonstrates that Saccharum s.l. is polyphyletic and Tripidium (distributed in the Old World) belongs to a distinct lineage from Saccharum s.s. (Old World) and Erianthus s.s. (= Erianthus sect. Erianthus, New World). Therefore, this study confirms the recognition of Tripidium as a genus distinct from Saccharum and Erianthus, which is also supported by morphology and nuclear markers. The circumscription of Erianthus s.s. remains unclear since our results are consistent with either considering it as a distinct genus or including it in Saccharum. Better understanding of the evolutionary relationships of sugarcane and relatives may be useful for the selection of potential taxa for interspecific and intergeneric crosses in the genetic improvement of sugarcane. A taxonomic treatment of the six species of Tripidium is also presented, including descriptions, illustrations, data on geographical distribution, and three new nomenclatural combinations.

 

Tags:

Share on Facebook
Share on Twitter
Please reload

Recent Posts

November 11, 2019

October 24, 2019

October 3, 2019

Please reload

Archive
Please reload

Search By Tags
Please reload

Follow Us
  • Facebook Basic Square
  • Twitter Basic Square
  • Google+ Basic Square