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Nitrogen dose dependant changes in grain morphology parameters are correlated with grain protein and yield traits in field-grown diverse rice genotypes

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Abstract

Nitrogen (N) deficiency alters grain morphology and reduces yield and quality rice (Oryza sativa L.). This study investigates the impact of nitrogen (N) deficiency on grain morphology, yield, and quality in 30 diverse rice genotypes. The genotypes were grown under field conditions during the 2019 and 2020-kharif seasons, subjected to two N regimes: N deficient (N0) and N sufficient (N120). Nitrogen deficiency resulted in reduced grain weight and protein content. Variations in grain morphology-related traits were observed among rice genotypes under different N applications, and these changes were correlated with yield. Certain genotypes, like APO, Nerica-L-42, and Kalinga-1, exhibited better performance under N0, indicating their tolerance to low N environments. Additionally, specific genotypes showed higher grain protein content under both N0 and N120 treatments. The study highlights the relationship between grain N content, grain morphology, and yield traits in rice under varying N conditions.

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Acknowledgements

The authors thank the ICAR-Indian Agricultural Research Institute for funding and the necessary facilities. BK acknowledges ICAR-IARI for the fellowship support received during the study.

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Conceptualization of research (LS and BKP); Designing of the experiments (LS, VC, GK, SK, AK, DK, NCG); Contribution of experimental materials (SK, AK, VC, GK); Execution of field/lab experiments and data collection (BKP); Analysis of data and interpretation (BKP, LS); Preparation of the manuscript (BKP, LS).

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Correspondence to Lekshmy Sathee.

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Padhan, B.K., Sathee, L., Kumar, S. et al. Nitrogen dose dependant changes in grain morphology parameters are correlated with grain protein and yield traits in field-grown diverse rice genotypes. Plant Physiol. Rep. 28, 490–499 (2023). https://doi.org/10.1007/s40502-023-00752-6

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  • DOI: https://doi.org/10.1007/s40502-023-00752-6

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