Stability of Valepotriate Specific Valerian Chemotypes using Eberhart and Russell, AMMI, BLUP, WAAS and MTSI

Due to over-exploitation of Valeriana jatamansi rhizomes this species is now on the verge of extinction in India. For sustainable production and supply to the market/herbal industries, present study was conducted on twenty one chemotypes for four years, considering the four valepotriates. Analysis of variance based on Eberhart and Russell, additive multiplicative mean interaction was performed for all the valepotriates, which indicated highly significant Chemotype × Environment interaction for the valepotriates valtrate, acevaltrate, didrovaltrate, IVHD valtrate. The chemotypes A/F/38, D/B/10, D/B/15, U/B/1 were superior for valtrate and for acevaltrate the stable chemotypes were A/B/31, D/B/5, A/F/38, A/F/15, D/B/16, D/F/19. For didrovaltrate A/B/31, A/F/38, D/F/19, D/B/13 these four chemotypes are identified as superior and highly stable chemotypes. Seven chemotypes namelyA/B/7, A/F/8,A/B/40, U/B/46, U/B/1, D/B/16 and A/B/42 were superior and highly stable chemotypes for IVHD valtrate. The three chemotypes namely A/B/31, A/B/42 and U/B/1 were superior and stable for all the valepotriates. The stable valepotriate specific chemotypes could be used for valerian varietal development programme and could ensure the preservation of the species