Vol. 10, Issue 3 (2021)

Author(s):
Bharti Sao, LS Verma and GL Sharma

Abstract:
Rooted cuttings of dahlia cultivars Kenya Blue, Kenya Yellow and Kenya Original were exposed to 0, 10, 15 and 20 Gy gamma rays and planted in earthen pots (8”). Each treatment consists of four replications with 12 treated rooted cuttings each. Among the irradiated population, the highest mortality percentage (38.81%) and abnormal plants percentage (15.88%) was recorded at 20 Gy dose. However, highest survival percentage (100%) observed at untreated plants. As regards to the cultivars, Kenya Yellow had maximum mortality percentage (30.80%) as well as abnormal plant percentage (10.06%). Meanwhile, significantly higher survival percentage was noted in Kenya Original (83.30%). The probit analysis indicated the extrapolated LD₅₀ dose was found beyond 20 Gy for survival of cultivars, Kenya yellow had low LD_50.