The present investigation was carried out at the College of Forestry, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India during August, 2018 to June, 2019 to study the genetic variability in growth characteristics among different clones of Eucalyptus tereticornis. Different clones of Eucalyptus tereticornis Sm. were planted in RCBD, with 4 replications revealed significant variations among all eight treatments (clones) with respect to 9 different characters. Based on the mean performance, treatment-1 (clone-526) showed maximum value for characters like biomass (1124.17), plant height (247.9 cm), collar diameter (23.25 mm), and a number of leaves plant-1 (463.25 number). Similarly, the maximum value was observed in treatment-8 (clone-136) for traits like leaf area (42.70 cm2), leaf length (15 cm), and leaf width (5.75 cm). The highest leaf length to leaf width ratio (3.57) and lowest number of branches plant-1 (18.75 number) were found in treatment-2 (clone-288). All characters had exhibited higher genotypic variance than an environmental variance. Similarly, the genetic coefficient of variation in the case of all variables was also found greater than an environmental coefficient of variation. Heritability was found maximum in plant height (87.35%) and all other characters also showed high heritability. Genetic advance as % of mean was found maximum in biomass (71.15%). Based on the overall mean performance of growth characters, Treatment-1 (Clone-526) was found as a superior clone with respect to the most important character biomass for the test locality. High GCV, heritability, and GAM value for biomass indicated that the character would respond to selection for the improvement program.
The present crisis has emphasized human dependency on bamboo with quality planting materials. A study focused on the effect of the different concentrations of IBA (0 ppm, 100 ppm, 200 ppm, 300 ppm) on the sprouting and rooting behaviours of 5 bamboo species viz. Dendrocalamus strictus, Bambusa vulgaris, B. nutans, B. tulda and B. bambos found in coastal Odisha in order to get an idea for mass multiplication and biomass production to meet the multifarious demands of bamboo based sector. It was carried out in Split-Plot Design with 3 replications with 5 species of bamboo as main plot factor band different concentrations of IBA as sub-plot factor. Different doses of IBA (0 ppm, 100 ppm, 200 ppm and 300 ppm) were prepared and those concentrations were poured inside the hole that were made with the help of a driller and then planted in prepared raised bed of 40x37 ft. After 3 months different parameters such as root length, leaf area, No. of roots, Above and underground Biomasses etc. are studied and observations were recorded. Max. no. of roots was observed in B. nutans for 0 ppm. Longest root length was recorded in B. nutans for 300 ppm. Max. fresh and dry below ground biomass was observed in B. nutans for 300 ppm and Max. Fresh and dry above ground biomass was recorded in B. nutans for 0 ppm and 300 ppm respectively. Mas. Quality index was recorded in B. nutans for 0 ppm and highest volume index was observed in B. vulgaris for 200 ppm.
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