Vol. 11, Issue 9 (2022)

Author(s):
Arya Gopinath MP, Jayalekshmy VG, Surendran M and Amrutha Unni M

Abstract:
Rice yield is affected by a number of diseases among which bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv oryzae is one of the oldest and most severe. The introduction and widespread cultivation of high yielding cultivars having narrow genetic base was led to increased susceptibility to the diseases such as bacterial blight. The most effective method against the control of this deadly disease is the improvement and utilization of the host plant resistance. Hence the present study was undertaken with the aim of evaluating the 25 breeding lines of the popular Kerala rice variety Prathyasa along the resistant and susceptible checks to find out the resistant plants which can be utilized in further breeding programs as sources of resistance. Among the 25 lines screened two (Pr-446-5 and Pr-446-19) were identified as resistant and rest were classified to different resistance and susceptibility classes.