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Evaluation of the mutants and soma clones under different location helped in identifying superior mutants for different morphological, yield and quality parameter. Mean values of six environments indicated that Mutant MV₇ recorded significantly maximum plant height, number of branches (71.63 cm; 48.23) which was superior over all other mutants and check variety K-8. For yield & quality parameters also mutant MV₇ has recorded maximum tuberous ischolar_main length (29.17 cm), maximum fresh & dry tuberous ischolar_main weight (666.81 g; 177.94 g, respectively) and produced maximum forskolin content (0.76%). Among locations, Bangalore location was more favorable for expression of maximum plant height, number of branches, number of leaves and leaf area at harvest (180 days) with mean value (67.73 cm; 48.34; 791.22 & 10465.75 cm², respectively) followed by Shimoga and Mandya. When yield parameters are considered, Bangalore location more favoured for maximum production of number of tuberous ischolar_mains (17.83), tuberous ischolar_main length (27.52 cm), ischolar_main diameter (2.70 cm), fresh tuberous ischolar_main weight (556.53 g) and dry tuberous ischolar_main weight (143.77 g) & forskolin content (0.78 %). The superior mutant MV₇ was released as a variety "AISIRI" by State varietal release committee. Further, the mutant was also sent for registration to NBPGRI, New Delhi and a National ID- IC-547017 is also obtained and conserved at the Germplasm Conservation Centre, NBPGRI, New Delhi.

Keywords

Plectranthus barbatus Andrews, Mutants, Somaclones, Multilocation, Forskolin, AISIRI Variety

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