title: Genotypic variation of zinc and selenium concentration in grains of Brazilian wheat lines.
abstract: Exploration of genetic resources for micronutrient concentrations facilitates the breeding of nutrient-dense crops, which is increasingly seen as an additional, sustainable strategy to combat global micronutrient deficiency. In this work, we evaluated genotypic variation in grain nutrient concentrations of 20 Brazil wheat (Triticum aestivum L.) accessions in response to zinc (Zn) and Zn plus selenium (Se) treatment. Zn and Se concentrations in grains exhibited 2- and 1.5-fold difference, respectively, between these wheat accessions. A variation of up to 3-fold enhancement of grain Zn concentration was observed when additionally Zn was supplied, indicating a wide range capacity of the wheat lines in accumulating Zn in grains. Moreover, grain Zn concentration was further enhanced in some lines following supply of Zn plus Se, showing stimulative effect by Se and the feasibility of simultaneous biofortification of Zn and Se in grains of some wheat lines. In addition, Se supply with Zn improved the accumulation of another important micronutrient, iron (Fe), in grains of half of these wheat lines, suggesting a beneficial role of simultaneous biofortification of Zn with Se. The significant diversity in these wheat accessions offers genetic potential for developing cultivars with better ability to accumulate important micronutrients in grains.
authors.affiliation: Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14853, USA; Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY 14853, USA; Soil Science Department at Federal University of Lavras, P.O. Box 3037, 37200-000 Lavras, MG, Brazil. Electronic address: amaralufla@gmail.com.
authors.forename: Guilherme A
authors.initials: GA
authors.lastname: Souza
authors.affiliation: Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14853, USA. Electronic address: jjh16@cornell.edu.
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Hart
authors.affiliation: Soil Science Department at Federal University of Lavras, P.O. Box 3037, 37200-000 Lavras, MG, Brazil. Electronic address: janicegc@ufla.dcs.br.
authors.forename: Janice G
authors.initials: JG
authors.lastname: Carvalho
authors.affiliation: Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14853, USA. Electronic address: mar9@cornell.edu.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Rutzke
authors.affiliation: Embrapa Cerrados (CPAC), BR 020 km 18, P.O. Box 08223, CEP 73310-970 Planaltina, DF, Brazil. Electronic address: julio.albrecht@embrapa.br.
authors.forename: Júlio César
authors.initials: JC
authors.lastname: Albrecht
authors.affiliation: Soil Science Department at Federal University of Lavras, P.O. Box 3037, 37200-000 Lavras, MG, Brazil. Electronic address: guilherm@dcs.ufla.br.
authors.forename: Luiz Roberto G
authors.initials: LR
authors.lastname: Guilherme
authors.affiliation: Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14853, USA. Electronic address: lvk1@cornell.edu.
authors.forename: Leon V
authors.initials: LV
authors.lastname: Kochian
authors.affiliation: Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14853, USA; Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY 14853, USA. Electronic address: ll37@cornell.edu.
authors.forename: Li
authors.initials: L
authors.lastname: Li
mesh_terms: D001938:Brazil; D014644:Genetic Variation; D005838:Genotype; D007501:Iron / Q000378:metabolism; D012639:Seeds / Q000378:metabolism*; D012643:Selenium / Q000378:metabolism*; D013045:Species Specificity; D014908:Triticum / Q000235:genetics* / Q000378:metabolism; D015032:Zinc / Q000378:metabolism*
chemical_list: D007501:Iron; D012643:Selenium; D015032:Zinc
keywords: Biofortification; Germplasm; Selenium; Triticum aestivum L.; Zinc