GENETIC VARIABILITY, GENETIC DIVERSITY, ASSOCIATION AND PATH ANALYSIS FOR ECONOMIC TRAITS IN INDIAN OREGANO (Origanum vulgare L)

K.T. VENKATESHA¹*, VED RAM SINGH², V. SPOORTHI³, RAJENDRA CHANDRA PADALIA⁴, RAM SWAROOP VERMA⁵, RAKESH KUMAR UPADHYAY⁶, RAKESH KUMAR⁷, AMIT CHAUHAN^8
1CSIR -Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), Research Centre, Pantnagar, P.O. - Dairy Farm Nagla, Uttarakhand, 263149, India
²CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), P.O. CIMAP, Lucknow, 226015, Uttar Pradesh, India
³University of Agricultural Sciences, GKVK, Bangalore, 560065, India
⁴CSIR -Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), Research Centre, Pantnagar, P.O. - Dairy Farm Nagla, Uttarakhand, 263149, India
⁵CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), P.O. CIMAP, Lucknow, 226015, Uttar Pradesh, India
⁶CSIR -Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), Research Centre, Pantnagar, P.O. - Dairy Farm Nagla, Uttarakhand, 263149, India
⁷CSIR -Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), Research Centre, Pantnagar, P.O. - Dairy Farm Nagla, Uttarakhand, 263149, India
⁸CSIR -Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), Research Centre, Pantnagar, P.O. - Dairy Farm Nagla, Uttarakhand, 263149, India
* Corresponding Author : venkatesha@cimap.res.in

Received : 18-06-2018     Accepted : 24-06-2018     Published : 30-06-2018
Volume : 10     Issue : 12       Pages : 6417 - 6421
Int J Agr Sci 10.12 (2018):6417-6421

Keywords : chemo-types, cluster, correlation, genotypic variance, heritability
Academic Editor : Gangadhara K.
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR- CIMAP), P.O. CIMAP, Lucknow, 226015, Uttar Pradesh, India
Author Contribution : All author equally contributed

To know the genetic variability, genetic divergence, the relationship between traits and path coefficient analysis of characters in Indian oregano accessions (Origanum vulgare L.). A total of fourteen Indian oregano accessions characterized for agro-morphological traits and chemical constituents of oil. Significant genetic variability noticed among the fourteen oregano accessions. The highest genotypic coefficient of variance (GCV)and phenotypic coefficient of variance (PCV) observed for herb yield (63.52, 64.22) respectively. Highest genetic advance(199.39) observed for herb yield. By D2 values, all the fourteen oregano accessions grouped into two diverse clusters. The Cluster I was the largest group that comprised of ten oregano accessions. Maximum intracluster distance observed in cluster II (10344.76) and the minimum in cluster I (5720.50). A significant chemical variability also noticed among the fourteen oregano accessions. The genotypic correlation coefficient among the traits revealed that plant height significantly positively correlated with canopy diameter (0.80**) and internodal length (0.83**). Canopy diameter significantly positively correlated with herb yield plant- (0.72 **). The path coefficient analysis revealed that internode length (0.70) has a highest positive direct effect on oil yield.

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