Genetic improvement, chemotype selection and morphological/molecular characterization of Chrysopogon zizanioides (L.) Roberty for IPR protection. Analysis of vetiver accession by different molecular marker along with essential oil extraction as Chrysopogon zizanioides (L.) Roberty (syn. Vetiveria zizanioides (L.) Nash, an economical aromatic grass use for essential oil and cultivated in different part of world.