author(s)
Satyam N Goplani, DK Varu, Kruti R Varsani and Mayuri H Nandania

abstract
The present experiment entitled “Effect of paclobutrazol on morphological traits in different adenium varieties and genotypes”. The experiment was conducted at Natural Ventilated Poly House, Hi-Tech Horticulture Park, Department of Horticulture, College of Horticulture, Junagadh Agricultural University, Junagadh during 2024. The experiment was laid out in Completely Randomized Design (Factorial) with twenty treatment combinations, consisting of ten level of varieties and genotypes i.e., Sunny Bunny (V1), Dancing Santa (V2), Beauty Queen (V3), Dragon Blood (V4), Butterfly Dream (V5), ADWB-78 (V6), ADWB-1 (V7), ADWB-22 (V8), ADWB-4B (V9) and ADWB-50 (V10) and two level of drenching with paclobutrazol 500 ppm (C1) and 1000 ppm (C2) four times at an interval of 40 days. The treatment was replicated two time. The results revealed that the variation due to different varieties and genotypes was found significant at 100 and 180 days after potting, minimum plant height (25.52 and 27.34 cm) was observed in Dragon Blood (V4). highest caudex girth (13.87 and 14.30 cm) was observed in Beauty Queen (V3) and highest leaf area (18.59 and 17.33 cm2) was observed in Dragon Blood (V4). Highest number of leaves (64.06 and 69.68) were found in ADWB-22 (V8) and highest number of branches (7.33 and 7.66) were recorded in ADWB- 4B (V9). The results indicated that the variation in response to different concentrations of paclobutrazol was statistically significant at 100 and 180 days after potting, minimum plant height (26.88 and 28.14 cm) was observed in 1000 ppm paclobutrazol (C2). Maximum number of branches (6.28 and 6.53) and number of leaves (58.80 and 62.61) were also recorded in 1000 ppm paclobutrazol (C2). While maximum caudex girth (13.38 and 14.00 cm) and leaf area (16.49 and 15.15 cm2) was observed in 500 ppm concentration (C1). The interaction effect of different varieties/genotypes and paclobutrazol concentration was found non-significant for all parameter except leaf area. highest leaf area (24.88 and 23.11 cm2) was noted in treatment combination of Dragon Blood with 500 ppm paclobutrazol concentration (V4C1) at 100 and 180 days after potting. From the results, it can be concluded that minimum plant height was noted in Dragon Blood with drenching 1000 ppm paclobutrazol at 100 and 180 days after potting, four times at an interval of 40 days in adenium.