Molecular phylogeny of Glyphochloa (Poaceae, Panicoideae), an endemic grass genus from the Western Ghats, India

Gosavi, Kumar Vinod Chhotupuri and Yadav, Shrirang R and Karanth, Praveen K and Surveswaran, Siddharthan (2016) Molecular phylogeny of Glyphochloa (Poaceae, Panicoideae), an endemic grass genus from the Western Ghats, India. In: JOURNAL OF SYSTEMATICS AND EVOLUTION, 54 (2). pp. 162-174.

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Abstract

The genus Glyphochloa (Poaceae: Panicoideae: Andropogoneae: Rottboellinae) is endemic to peninsular India and is distributed on lateritic plateaus of low and high altitude in and around Western Ghats and the Malabar Coast. The genus presumably originated and diversified in the Western Ghats. Species relationships in the genus Glyphochloa were deduced here based on molecular phylogenies inferred using nuclear ribosomal ITS sequences and plastid intergenic spacer regions (atpB-rbcL, trnT-trnL, trnL-trnF), and new observations were made of spikelet morphology, caryopsis morphology and meiotic chromosome counts. We observed two distinct clades of Glyphochloa s.l. One of these (group I') includes Ophiuros bombaiensis, and is characterized by a single-awned lower glume and a base chromosome number of 6; it grows in low elevation coastal areas. The other clade (group II') has a double-awned lower glume, a base chromosome number of 7, and is restricted to higher elevation lateritic plateaus; G. ratnagirica may belong to the group II clade, or may be a third distinct lineage in the genus. A sister-group relationship between group I and II taxa (with or without G. ratnagirica) is not well supported, although the genus is recovered as monophyletic in shortest trees inferred using ITS or concatenated plastid data. We present a key to species of Glyphochloa and make a new combination for O. bombaiensis.

Item Type:	Journal Article
Publication:	JOURNAL OF SYSTEMATICS AND EVOLUTION
Publisher:	WILEY-BLACKWELL
Additional Information:	Copy right for this article belongs to the WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Keywords:	cytology; Glyphochloa; Indian endemic grasses; molecular phylogeny; Ophiuros bombaiensis; spikelet morphology; Western Ghats
Department/Centre:	Division of Biological Sciences > Centre for Ecological Sciences
Date Deposited:	29 Apr 2016 05:43
Last Modified:	29 Apr 2016 05:43
URI:	http://eprints.iisc.ac.in/id/eprint/53734

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