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In breeding programs, direct selection based on crop yields is paradoxical due to its complex polygenically inherited nature, that is impacted by its component traits. To determine the degree of relationship between yield and yield components and other traits in nine barley varieties, a field experiment was carried out at the Regional Agricultural Research Station, Jashore during Rabi 2021-2022. For plant height, disease and insect reaction, and grain yield, substantial heritability together with strong genetic progress as a percentage of mean were detected, indicating a prevalence of additive gene action in the expression of these traits. At both the genotypic and phenotypic levels, the correlation coefficient between grain yield was shown to be positively correlated with plant height and thousand grain weight, indicating that an increase in these traits will boost grain production. Both genotypic and phenotypic analysis of the path coefficient demonstrated that plant height and thousand grain weight had a direct positive impact on grain production, highlighting the significance of these parameters as the primary contributors to yield. For the purpose of genetically improving barley yield, a genotype with a higher extent of these qualities could be chosen as a parent from among genotypes that already exist. [ABSTRACT FROM AUTHOR]

Contamination of fish with metals is a worldwide consumer safety concern. In this study, three metals such as arsenic (As), chromium (Cr), and lead (Pb) were measured in two commonly consumed fish species Oreochromis niloticus (Tilapia) and Pangasianodon hypophthalmus (Pangasius) that are commercially farmed. The concentration of the metals studied was found within the permissible limits. The concentrations of As, Cr, and Pb in tilapia fluctuated, ranging from not detected (ND) to 0.114 mg/kg, ND to 0.009 mg/kg, and ND to 0.085 mg/kg, respectively. For Pangasius, the concentrations were in the range of 0.014 to 0.118 mg/kg for As, ND to 0.02 mg/kg for Cr, and ND to 0.047 mg/kg for Pb. Hierarchical clustering revealed that As was possibly taken up by leachate and groundwater, while Cr and Pb were from contaminated feed. The results of the calculations for estimated daily intake, target hazard quotient, hazard index, and carcinogenic risk made it clear that consumption of the fish studied does not have a significant adverse effect on consumer health. In conclusion, the contamination levels of farmed tilapia and Pangasius sold in the study area are within acceptable limits, but regular monitoring is required to ensure safe production., (© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)