Vol. 11, Issue 2 (2022)

Author(s):
Monika Shahani, Rajesh Kumar, Nilanjaya, Ashutosh Kumar, Abhishek Mishra and Subhash Bijarania

Abstract:
The study was executed with 150 genotypes of the rice along with three check varieties namely, Rajshree, Pankaj, and Rajendra Neelam for the eleven quantitative traits by using augmented randomized complete block design at Rice research farm of RPCAU, Pusa, Bihar, during Kharif season of 2019.These genotypes were screened under aerobic condition for assessment of interrelationship among various yield attributing parameters and brown spot disease components to assess eleven different traits. Association analysis discovered that the grain yield per plant had a significant positive association with test weight and significant high negative association with AUDPC. However, it was revealed that test weight exhibited negligible positive direct effect but the AUDPC exhibited highest negative direct effect on grain yield per plant. It was also reported that most of the traits were exhibiting moderate to high negative indirect effect on grain yield per plant via AUDPC suggesting that the negative selection for disease severity and AUDPC will reduce the damage to crop by the pathogen and consequently improve the yield.