The aim of this study was to evaluate dietary dosages of Lyngbya hieronymusii on the immune response and disease resistance against infections due to the opportunistic pathogen Aeromonas hydrophilia, in fish fingerlings of Platycephalus gibbosus. A cyanob

Micronutrient deficiencies have been widely noticed in rice, wheat and other crops which causes low yield and increases malnutrition. Zinc deficiency remained a major problem all over country. Zinc deficiency can be overcome by addition of Zn fertilizer. But alternative strategy is use of efficient plant genotype that can more effectively grow on soil with low available zinc. With this background, a pot experiment was conducted to evaluate stress indices for identification of rice genotypes with higher yield in zinc stress soil. The treatment consisted of ten rice genotypes with two levels of Zn (0, 5 mg/kg) applied through zinc sulfate. The experimental soil was deficient in zinc. The results revealed that stress tolerance index (TOL) and stress susceptible index (SSI) had poor correlation with grain yield under Zn stress and Zn adequate condition. Both were associated with poor yield under Zn adequate condition and therefore could not identify genotypes which perform well in both conditions. But mean productivity (MP), geometric mean productivity (GMP) along with stress tolerance index (STI) identified genotypes which could perform well under both Zn stress and Zn adequate condition. This was supported by very strong relationship that STI had with YS and YP. Thus ADT 43, CO 45, ADT 46 and ADT 36 was identified that perform well both in Zn stress and non stress environment.