Variation in grain zinc and iron concentrations, grain yield and associated traits of biofortified bread wheat genotypes in Nepal

dc.creatorDhruba Bahadur Thapa
dc.creatorSubedi, M.
dc.creatorYadav, R.P.
dc.creatorJoshi, B.P
dc.creatorAdhikari, B.N.
dc.creatorShrestha, K.P.
dc.creatorMagar, P.B.
dc.creatorPant, K.
dc.creatorGurung, S.B.
dc.creatorGhimire, S.
dc.creatorGautam, N.R.
dc.creatorAcharya, N.J.
dc.creatorSapkota, M.
dc.creatorVinod Kumar Mishra
dc.creatorJoshi, A.K.
dc.creatorSingh, R.P.
dc.creatorVelu, G.
dc.date2022-07-22T00:20:18Z
dc.date2022-07-22T00:20:18Z
dc.date2022
dc.date.accessioned2023-07-17T20:09:21Z
dc.date.available2023-07-17T20:09:21Z
dc.identifierhttps://hdl.handle.net/10883/22125
dc.identifier10.3389/fpls.2022.881965
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513887
dc.descriptionWheat (Triticum aestivum L.) is one of the major staples in Nepal providing the bulk of food calories and at least 30% of Fe and Zn intake and 20% of dietary energy and protein consumption; thus, it is essential to improve its nutritional quality. To select high-yielding genotypes with elevated grain zinc and iron concentration, the sixth, seventh, eighth, and ninth HarvestPlus Yield Trials (HPYTs) were conducted across diverse locations in Nepal for four consecutive years: 2015–16, 2016–17, 2017–18, and 2018–19, using 47 biofortified and 3 non-biofortified CIMMYT-bred, bread wheat genotypes: Baj#1, Kachu#1, and WK1204 (local check). Genotypic and spatial variations were found in agro-morphological traits; grain yield and its components; and the grain zinc and iron concentration of tested genotypes. Grain zinc concentration was highest in Khumaltar and lowest in Kabre. Likewise, grain iron concentration was highest in Doti and lowest in Surkhet. Most of the biofortified genotypes were superior for grain yield and for grain zinc and iron concentration to the non-biofortified checks. Combined analyses across environments showed moderate to high heritability for both Zn (0.48–0.81) and Fe (0.46–0.79) except a low heritability for Fe observed for 7th HPYT (0.15). Grain yield was positively correlated with the number of tillers per m2, while negatively correlated with days to heading and maturity, grain iron, grain weight per spike, and thousand grain weight. The grain zinc and iron concentration were positively correlated, suggesting that the simultaneous improvement of both micronutrients is possible through wheat breeding. Extensive testing of CIMMYT derived high Zn wheat lines in Nepal led to the release of five biofortified wheat varieties in 2020 with superior yield, better disease resistance, and 30–40% increased grain Zn and adaptable to a range of wheat growing regions in the country – from the hotter lowland, or Terai, regions to the dry mid- and high-elevation areas.
dc.languageEnglish
dc.publisherFrontiers Media S.A.
dc.relationhttps://figshare.com/collections/Variation_in_Grain_Zinc_and_Iron_Concentrations_Grain_Yield_and_Associated_Traits_of_Biofortified_Bread_Wheat_Genotypes_in_Nepal/6042989
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationGenetic Innovation
dc.relationBill & Melinda Gates Foundation
dc.relationForeign, Commonwealth & Development Office
dc.relationhttps://hdl.handle.net/10568/126983
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source13
dc.source1664-462X
dc.sourceFrontiers in Plant Science
dc.source881965
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectBiofortified Wheat
dc.subjectHarvestPlus
dc.subjectGrain Yield
dc.subjectGrain Iron Concentration
dc.subjectGrain Zinc Concentration
dc.subjectBIOFORTIFICATION
dc.subjectWHEAT
dc.subjectGRAIN
dc.subjectYIELDS
dc.subjectZINC
dc.subjectIRON
dc.titleVariation in grain zinc and iron concentrations, grain yield and associated traits of biofortified bread wheat genotypes in Nepal
dc.typeArticle
dc.typePublished Version
dc.coverageNepal
dc.coverageSwitzerland


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