Under different environmental conditions, crop yields differ primarily due to G and E interactions. The Global Rice Array (GRA-IV) is IRRI's fourth flagship project to identify climate-resilient rice genotypes. Use of Several univariate and multivariate methods can differentiate genotypes based on their behaviour under different environmental conditions. Since genotypes were ranked differently across models, ASR and Yield Stability Index (YSI) were combined in this study. It included 15 rice genotypes (from a collection of global rice arrays IV called the "Antenna Panel"). Experimentation done in five diverse environments in the Northern Tarai region of India. Grain yield over five diverse environments was significantly influenced by genotypes, G (24.51%), environments, E (40.79%), and genotype and environment effects combined (34.69%). G2, G5, G8, G15 and G10 exhibited lowest ASR values. G2 is the most stable high-yielder, concluded on the basis of new stability index calculated by combining the ASR's and YSI values; these superior genotypes can benefit breeding programs in the future. A stable-high yielder can be more accurately predicted with the new stability index.

The brown plant hopper (Nilaparvata lugens) is a major phloem-feeding pest in rice cultivation across Asia, responsible for “hopper burn” and substantial yield reductions. Sustainable management strategies emphasize host-plant resistance to mitigate infestations while maintaining ecological balance. This study assessed the resistance of rice genotypes from the Global Rice Array—specifically, the “Antenna IV’s Panel”—under controlled glasshouse and laboratory conditions. Additionally, SSR marker analysis was conducted to validate resistance-associated loci and identify potential donor lines for breeding programs.The results indicated that genotypes IRRI 154, Sahel 108, IR 93354:34-B-5-1-23-1RGA-1-B-B, along with the susceptible check TN1, exhibited the highest susceptibility to BPH, as reflected in their damage scores. Conversely, genotypes such as IRRI 147, SANHUANGZHAN NO 2, IRRI 104, and NANHI demonstrated the lowest levels of BPH damage, suggesting a higher degree of resistance. Among the 58 evaluated genotypes, 54 exhibited primary resistance, with varying numbers of resistance genes: 21 genotypes carried three resistance genes, 12 possessed five, and nine contained four. However, none of the tested genotypes harbored all major resistance genes, emphasizing the necessity for further breeding efforts to develop more robust BPH-resistant rice varieties.