Identification of superior rice donors with enhanced nitrogen use efficiency using a comprehensive multivariate genotype selection strategy

Identification of superior rice donors with enhanced nitrogen use efficiency using a comprehensive multivariate genotype selection strategy

Summary: Improving nitrogen use efficiency (NUE) of rice plants utilizing a few end-of-season traits poses a severe phenotyping bottleneck in exploring the genetic diversity of a large population and genotype selection accuracy. Therefore, a comprehensive multivariate genotype selection strategy was...

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Main Authors: Nguyen Trung Duc, Amooru Harika, Dhandapani Raju, Sudhir Kumar, Renu Pandey, Lekshmy Sathee, Elangovan Alimuthu, Biswabiblap Singh, Chandrapal Vishwakarma, Ranjith Kumar Ellur, Mir Asif Iquebal, Rakesh Pandey, Ambika Rajendran, Akshay Sakhare, Rabi Narayan Sahoo, Naga Neeraja Chirravuri, A. Senthil, Viswanathan Chinnusamy
Format: Article
Language:English
Published: Elsevier 2025-09-01
Series:iScience
Subjects:
Natural sciences
Genotyping
Genomic library
Plant biology
Agricultural science
Online Access:http://www.sciencedirect.com/science/article/pii/S258900422501541X
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Summary:Summary: Improving nitrogen use efficiency (NUE) of rice plants utilizing a few end-of-season traits poses a severe phenotyping bottleneck in exploring the genetic diversity of a large population and genotype selection accuracy. Therefore, a comprehensive multivariate genotype selection strategy was developed to explore maximum genetic variation of 300 diverse rice genotypes and accurately select promising rice donors with enhanced NUE traits on a multi-year (2019, 2021, and 2022) -trait (126 traits) -environment (2) -temporal (5) –location (3) scale. The multi-trait genotype ideotype distance index (MGIDI) ranked Cauvery, Suweon, RPW9-4 (SSI) and BAM3690 (IC463705) as superior NUE genotypes; Moroberekan, PUSA1121 and BAM8315 (Basmati 370) as low NUE genotypes. The multi-location field performance and molecular analysis of key nitrogen assimilatory genes confirmed the outperformance of the Cauvery genotype in terms of possessing efficient N sensing, uptake, transport and assimilation characteristics under N-limited conditions. Phenome-wide multivariate analysis highlights root-shoot plastic response as a key target trait for breeding rice genotypes resilient to N stress conditions.
ISSN:2589-0042

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