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

作　　者：Kumar Vinod Chhotupuri Gosavi Shrirang R. Yadav K. Praveen Karanth Siddharthan Surveswaran 

机构地区：[1]Department of Botany, Shivaji University, Kolhapur 416004, India [2]Department of Botany, P.S.G.V.P.M. Arts, Science & Commerce College, Shahada, Nandurbar Dist. 425409, Maharashtra, India [3]Centre for Ecological Sciences, Indian Institute of Science, Bangalore 560012, India

出　　处：《Journal of Systematics and Evolution》2016年第2期162-174,共13页植物分类学报（英文版）

摘　　要：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.I. 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 li＇） 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.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.I. 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 li＇） 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.

关 键 词：CYTOLOGY Glyphochloa Indian endemic grasses molecular phylogeny Ophiuros bombaiensis spikelet morphology Western Ghats. 

分 类 号：Q949.714.2[生物学—植物学] S274.2[农业科学—农业水土工程]