Bridging old and new: Diversity and evaluation of high iron-associated stress response of rice cultivated in West Africa

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dc.creatorDiop, B.
dc.creatorWang, D.R.
dc.creatorDrame, K.N.
dc.creatorGracen, V.
dc.creatorTongoona, P.B.
dc.creatorDzidzienyo, D.
dc.creatorNartey, E.
dc.creatorGreenberg, A.J.
dc.creatorDjiba, S.
dc.creatorDanquah, E.Y.
dc.creatorMcCouch, S.R.
dc.date2020-07-06
dc.date2020-08-29T15:55:57Z
dc.date2020-08-29T15:55:57Z
dc.date.accessioned2026-06-27T13:19:13Z
dc.descriptionAdoption of rice varieties that perform well under high iron-associated (HIA) stress environments can enhance rice production in West Africa. This study reports the genetic characterization of 323 rice accessions and breeding lines cultivated in West Africa using genotyping-by-sequencing and their phenotypic response to HIA treatments in hydroponic solution (1500 mg l−1 FeSO4·7H2O) and hot-spot fields. The germplasm consisted of four genetic subpopulations: Oryza glaberrima (14%), O. sativa-japonica (7%), O. sativa-indica Group 1 (45%), and O. sativa-indica Group 2 (25%). Severe versus mild stress in the field was associated with a reduced SPAD value (12%), biomass (56%), and grain yield (57%), with leaf bronzing explaining 30% and 21% of the variation for biomass and grain yield, respectively. Association mapping using 175 indica genotypes identified 23 significant single nucleotide polymorphism (SNP) markers that mapped to 14 genomic regions. Genome-wide association study (GWAS) signals associated with leaf bronzing, a routinely used indicator of HIA stress, differed in hydroponic compared with field conditions. Contrastingly, six significant SNPs on chromosomes 8 and 9 were associated with the SPAD value under HIA stress in both field and hydroponic experiments, and a candidate potassium transporter gene mapped under the peak on chromosome 8. This study helps define criteria for assessing rice performance under HIA environments.
dc.identifierhttps://hdl.handle.net/10568/109110
dc.identifier.urihttp://hdl.handle.net/123456789/56442
dc.languageen
dc.publisherOxford University Press
dc.rightsOpen Access
dc.sourceDiop, B., Wang, D.R., Drame, K.N., Gracen, V., Tongoona, P., Dzidzienyo, D., Nartey, E., Greenberg, A.J., Djiba, S., Danquah, E.Y., McCouch, S.R. Bridging old and new: Diversity and evaluation of high iron-associated stress response of rice cultivated in West Africa, Journal of Experimental Botany, Volume 71, Issue 14, 6 July 2020, Pages 4188–4200, https://doi.org/10.1093/jxb/eraa182
dc.subjectrice
dc.subjectgenetic diversity
dc.subjectresearch
dc.titleBridging old and new: Diversity and evaluation of high iron-associated stress response of rice cultivated in West Africa
dc.typeJournal Article

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Centro Africano del Arroz (AfricaRice)