INTERRELATION OF YIELD AND YIELD CONTRIBUTING TRAITS IN F1 HYBRIDS AND THEIR PARENTS OF RICE (ORYZA SATIVA) UNDER SALT STRESS CONDITION

Abstract

Rice exhibits sensitivity to salinity, with varying degrees among different varieties, therefore to improve rice productivity under such conditions, it's necessary to select salttolerant genotypes (both parents and hybrids). The purpose of this examination was to explore the interrelationships among 15 vigorous F1 hybrids. The study entailed an assessment of the attributes of the six parent plants and their performance concerning yield and other relevant traits. This evaluation was predicated on the physio-morphological characteristics observed during the Kharif season of 2021. The findings demonstrated significant genotype variations (P ≤ 0.01) across all the traits examined. Fifteen F1 hybrids and their parental plants underwent assessment for various morpho-physiological traits across distinct salt treatments. In a hydroponic environment, Treatment 1 (control), Treatment 2 (6 dS m1 ), and Treatment 3 (8 dS m1 ) of sodium chloride were administered. The findings showed a strong and positive relationship between the number of productive tillers per plant, plant height, harvest index, panicle length, number of spikelets per panicle, leaf area, and grain production per plant when it comes to genetic features. Grain yield is a complicated attribute that depends on a number of other yield-related factors. According to our research, there is a strong positive association between harvest index, 1000 grain weight, potassium content, chlorophyll content, and other features and grain production per plant. On the other hand, there is an inverse relationship with sodium content. Therefore, giving priority to these particular features will help identify the best-performing F1 hybrids that produce more seeds per plant.