Studies on colchicine induced changes in bajra napier hybrid (Pennisetum glaucum x P. purpureum)

An experiment was conducted to estimate the lethal concentration of polyploidy inducing chemical Colchicine in two genotypes Bajra Napier hybrid CO 6 and TNCN 1534. Single nodded setts 1534 were treated with colchicine using different methods viz., whole immersion concentrations 0.05%, 0.10%, 0.15%, 0.20% 0.25% for 3 hours cotton swab method same five concentrations. The LC50 values observed based on growth reduction seedlings after planting by methods. sprouting percentage survival both gradually reduced increasing doses it also differed used. had value 0.21% genotype 0.19% 0.14% case 0.15% found be optimum indicating differential response treatment. Correlation between stomatal parameters indicated positive correlation when varieties duration a negative they hour method. As exposure increased, showed decreased growth. In method, width while length seen having increased. Keywords: Pennisetum, colchicine, sprouting, survivability, Probit analysis, &nbsp