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Is Oryza malampuzhaensis Krish. et Chand. (Poaceae) a valid species? Evidence from morphological and molecular analyses

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Abstract

Phylogenetic relationship between O. malampuzhaensis Krish. et Chand. (2n = 4x = 48; Poaceae, Oryzeae), a South Indian endemic wild rice with a disputed taxonomic identity, and eight other species belonging to the O. officinalis complex of the genus Oryza was examined using 62 morphological characters and 445 random amplified polymorphic DNA (RAPD) markers. Multivariate and cluster analyses using both the data sets clearly separated all accessions of O. malampuzhaensis into a distinct group. Genetic distances between O. malampuzhaensis and other species in O. officinalis complex were comparable with the distance between any other two taxa with species rank in this complex. Case-by-case taxonomic treatment of O. malampuzhaensis in relation to other species examined is presented. A taxonomic key for the discrimination of O. malampuzhaensis from other species in the O. officinalis complex has been constructed. Based on the present results, we strongly argue to restore the species rank to O. malampuzhaensis, as originally proposed by Krishnaswamy and Chandrasekharan (1958).

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Joseph, L., Kuriachan, P. & Thomas, G. Is Oryza malampuzhaensis Krish. et Chand. (Poaceae) a valid species? Evidence from morphological and molecular analyses. Plant Syst Evol 270, 75–94 (2008). https://doi.org/10.1007/s00606-007-0606-2

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