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Cymbopogon flexuous of the family Poaceae is a highly valued grass known throughout the world for its aromatic properties. The objective of the study is to identify novel myrcene and methyl iso-eugenol rich essential oil variety of lemongrass. Myrcene is an earthy, spicy, clove fragrance commonly used in the culinary and perfume industry while methyl iso-eugenol has a typical sweet-warm, spicy- clove, woody, floral odour mostly used in perfume industries. In the present study, a total of 230 lemongrass accessions were collected from different regions of North East India which were planted in Randomized Complete Block Design (RCBD) with three replications at experimental farms of CSIR-NEIST, Jorhat, during the year 2015. Morphological and essential oil quality data were recorded during the studied the year 2015-16 and 2016-17. Based on two years of selection trial data a high myrcene and methyl iso-eugenol rich essential oil line was identified and named as Jor Lab L-11. The identified line was planted along with two checked varieties at four different locations during the year 2017-18. The average essential oil yield of the Jor Lab L- 11 for the multi-location trial was 0.58 % and contained an average of 48.02 % and 39.11 % myrcene and methyl iso-eugenol respectively as major component in the essential oil. Myrcene and methyl iso-eugenol percentage, essential oil percentage, tillers/plant were significantly higher in the identified variety compared to check varieties. GC/MS data obtained from essential oil leaf Jor Lab L- 11 essential oil showed limonene, elemicin, β-pinene, citronellol, α-pinene, neryl acetate, linalool, methyl eugenol, geranyl acetate, geraniol, citral b, citronellal, citral a, α-terpineol, nerol, eucalyptol, caryophyllene oxide, 2-methylbicyclo[4.3.0]non-1(6)-ene, m-camphorene, camphor, diepi-cubenol, T-cadinol, anethole and epi-α-murulol as minor compounds. [ABSTRACT FROM AUTHOR]

Cymbopogon species, which belongs to the family Poaceae, is an important genus of medicinal and aromatic plants. The essential oil of the species of genus is rich in various valuable chemical compounds, which are useful for industrial and commercial purposes. In this present study, a total of 425 germplasm of Cymbopogon species were collected from different regions of India, and was analyzed for its agronomical, essential oil yield and quality data, for two year 2014-15 and 2015-16.Extraction of essential oil was done using hydro-distillation and the constituents were identified using GC/MS analysis. On the basis of two consecutive year data, a geraniol rich line was identified and the results were confirmed by planting as multi-location trial, along with the standard check during the year 2016-17 and 2017-18. The average essential oil yield of the newly developed variety in the five different locations was 0.54 % and average geranial content of the multi-location trial was 83 %; which is much higher as compared to the check variety that showed essential oil yield of 0.40 % and geraniol content of 46.8 %. This selected germplasm also showed better agronomical traits in comparison to the check variety. This new identified line was named as "Jor Lab L-15" and is suitable for commercial cultivation. [ABSTRACT FROM AUTHOR]

A new high essential oil yielding variety of lemongrass (Cymbopogon flexuosus L.) was developed through mutation breeding technique and registered at ICAR, New Delhi. This genotype was identified through repeated selection in gamma treated mutation populations. After initial screening from M4 mutation populations, higher essential oil genotype was identified and planted along with two check varieties in four different locations for two years in NE India and found to be stable for all the related parameters of yield. Average essential oil was recorded as 1.35% and herbage yield was 29.57 tonnes/ha/year which were significantly higher than the check varieties and total citral content was found as 79.5% which was followed by other minor compounds viz., linalool, iso-eugenol, limonene, α-pinene, geraniol, camphene, nerol, α-terpineol, tricyclene, α-elemol, geranyl acetate, eugenol acetate, citronellal, bicyclosesquiphellandrene, trans-β-ocimene, trans-β-caryophyllene, humulene epoxide ll, caryophyllene oxide and α-phellandrene. This newly developed novel variety was registered at ICAR, New Delhi vide registration no. INGR-18040 and named as 'Jor Lab L-14'. This variety propagates vegetatively by means of slips and is stable for commercial cultivation. [ABSTRACT FROM AUTHOR]

A new strain of Cymbopogon khasianus rich in methyl eugenol was identified and named Jor Lab L-9. It is stable for production of essential oil yield (average 0.81%; σ 2 di = 0.00) and methyl eugenol (average 74.56%; σ 2 di = 0.06). This variety was registered with ICAR-NBPGR, New Delhi, India, under registration number INGR-18037. [ABSTRACT FROM AUTHOR]