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Identification of genomic loci regulating grain iron content in aus rice under two irrigation management systems

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Title Identification of genomic loci regulating grain iron content in aus rice under two irrigation management systems
 
Creator Talukdar, Partha
Travis, Anthony J.
Hossain, Mahmud
Islam, Mohammed Rafiqul
Norton, Gareth J.
Price, Adam H.
 
Subject iron
quantitative trait loci
food security
plant breeding
 
Description Iron (Fe) deficiency is one of the common causes of anaemia in humans. Improving grain Fe in rice, therefore, could have a positive impact for humans worldwide, especially for those people who consume rice as a staple food. In this study, 225–269 accessions of the Bengal and Assam Aus Panel (BAAP) were investigated for their accumulation of grain Fe in two consecutive years in a field experiment under alternative wetting and drying (AWD) and continuous flooded (CF) irrigation. AWD reduced straw Fe by 40% and grain Fe by 5.5–13%. Genotype differences accounted for 35% of the variation in grain Fe, while genotype by irrigation interaction accounted for 12% of the variation in straw and grain Fe in year 1, with no significant interactions detected in year 2. Twelve rice accessions were identified as having high grain Fe for both years regardless of irrigation treatment, half of which were from BAAP aus subgroup 3 which prominently comes from Bangladesh. On average, subgroup 3 had higher grain Fe than the other four subgroups of aus. Genome-wide association mapping identified 6 genomic loci controlling natural variation of grain Fe concentration in plants grown under AWD. For one QTL, nicotianamine synthase OsNAS3 is proposed as candidate for controlling natural variation of grain Fe in rice. The BAAP contains three haplotypes of OsNAS3 where one haplotype (detected in 31% of the individuals) increased grain Fe up to 11%. Haplotype analysis of this gene in rice suggests that the ability to detect the QTL is enhanced in the BAAP because the high Fe allele is balanced in aus, unlike indica and japonica subgroups.
 
Date 2021-02-15
2023-01-06T09:20:49Z
2023-01-06T09:20:49Z
 
Type Journal Article
 
Identifier Talukdar, Partha, Travis, Anthony J., Hossain, Mahmud, Islam, Md Rafiqul, Norton, Gareth J. and Price, Adam H. 2022. Identification of genomic loci regulating grain iron content in aus rice under two irrigation management systems. Food and Energy Security 11(1):e329.
2048-3694
https://hdl.handle.net/10568/126643
https://doi.org/10.1002/fes3.329
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Source Food and Energy Security