Agronomic and Physiological Indices for Reproductive Stage Heat Stress Tolerance in Green Super Rice

Optimum growing temperature is necessary for maximum yield-potential in any crop. The global atmospheric changing more rapidly and irregularly every year. High at the flowering/reproductive stage rice causes partial to complete pollen sterility, resulting significant reduction grain yield. Green Super Rice (GSR) an effort develop elite type that can withstand multiple environmental stresses maintain yield different agro-ecological zones. current study was performed assess effect of heat stress on agronomic physiological attributes GSR flowering stage. Twenty-two lines four local checks were evaluated under normal heat-stress conditions agro-physiological parameters, including plant height (PH), tillers per (TPP), (GY), straw (SY), harvest index (HI), 1000-grain weight (GW), length (GL), cell membrane stability (CMS), normalized difference vegetative (NDVI), fertility percentage (PFP). Genotypes showed high variations all studied parameters except NDVI. Association principal component analysis (PCA) explained genetic diversity genotypes, relationship between particular We found GY, along with other traits, such as TPP, SY, HI, CMS, greatly affected by most while PH, GW, GL, PFP, NDVI only a few genotypes. Outperforming NGSR-16 NGSR-18 could be utilized parent development heat-tolerant rice. Moreover, these findings will helpful prevention management