A number of mulberry varieties are available in nature, but they lack one or the other economic character required for silkworm Bombyx mori L. as food. Colchicine (C22H25NO6) a known polyploidising agent used to induce morphological variation in plants. Efforts have been made to induce polyploidy in mulberry variety Kajali using colchicine. Mulberry variety Kajali is grown in mulberry germplasm bank and the vegetative buds are treated with aqueous solution (0.1%-0.5%) of colchicine. RBD Method with three replications/ treatment was followed. Agro-botanical traits such as sprouting, rooting and survivability percentages, plant height, leaf area and intermodal distance were encountered. Results revealed that, Kajali mulberry variety recorded decrease in the growth parameters with the increase in colchicine concentration. Plants recovered at C1 (Colchicine treated plants in F1 generation) generation showed beneficial characters only at 0.4% colchicine concentration, leaf area is considerably increased to 196.11cm2 compared to control (178.27cm2). Dwarf, stout, thick, greenish leaves, leaf yield increased to 10.11% and number of chloroplast ranged from 23-27 compared to control (44.00) at 0.4% concentration in C1 generation. Mulberry plants recovered at 0.4% colchicine concentration require further systematic yield trials and evaluation of colchiploids over a period would establish their potentiality as cultivars.
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[H.L.Ramesh and V.N.Yogananda Murthy (2014); Induction of Colchiploids in Mulberry (Morus) variety Kajali in C1 Generation Int. J. of Adv. Res. 2 (4). 0] (ISSN 2320-5407). www.journalijar.com
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