title: Genomic prediction for grain zinc and iron concentrations in spring wheat.
abstract: Predictability estimated through cross-validation approach showed moderate to high level; hence, genomic selection approach holds great potential for biofortification breeding to enhance grain zinc and iron concentrations in wheat. Wheat (Triticum aestivum L.) is a major staple crop, providing 20 % of dietary energy and protein consumption worldwide. It is an important source of mineral micronutrients such as zinc (Zn) and iron (Fe) for resource poor consumers. Genomic selection (GS) approaches have great potential to accelerate development of Fe- and Zn-enriched wheat. Here, we present the results of large-scale genomic and phenotypic data from the HarvestPlus Association Mapping (HPAM) panel consisting of 330 diverse wheat lines to perform genomic predictions for grain Zn (GZnC) and Fe (GFeC) concentrations, thousand-kernel weight (TKW) and days to maturity (DTM) in wheat. The HPAM lines were phenotyped in three different locations in India and Mexico in two successive crop seasons (2011-12 and 2012-13) for GZnC, GFeC, TKW and DTM. The genomic prediction models revealed that the estimated prediction abilities ranged from 0.331 to 0.694 for Zn and from 0.324 to 0.734 for Fe according to different environments, whereas prediction abilities for TKW and DTM were as high as 0.76 and 0.64, respectively, suggesting that GS holds great potential in biofortification breeding to enhance grain Zn and Fe concentrations in bread wheat germplasm.
authors.affiliation: International Maize and Wheat Improvement Center (CIMMYT), Apdo postal 6-641, Mexico, DF, Mexico. velu@cgiar.org.
authors.forename: Govindan
authors.initials: G
authors.lastname: Velu
authors.affiliation: International Maize and Wheat Improvement Center (CIMMYT), Apdo postal 6-641, Mexico, DF, Mexico.
authors.forename: Jose
authors.initials: J
authors.lastname: Crossa
authors.affiliation: International Maize and Wheat Improvement Center (CIMMYT), Apdo postal 6-641, Mexico, DF, Mexico.
authors.forename: Ravi P
authors.initials: RP
authors.lastname: Singh
authors.affiliation: International Maize and Wheat Improvement Center (CIMMYT), Apdo postal 6-641, Mexico, DF, Mexico.
authors.forename: Yuanfeng
authors.initials: Y
authors.lastname: Hao
authors.affiliation: International Maize and Wheat Improvement Center (CIMMYT), Apdo postal 6-641, Mexico, DF, Mexico.
authors.forename: Susanne
authors.initials: S
authors.lastname: Dreisigacker
authors.affiliation: Colegio de Postgraduados en Ciencias Agricolas, 56230, Texcoco, Estado de Mexico, Mexico.
authors.forename: Paulino
authors.initials: P
authors.lastname: Perez-Rodriguez
authors.affiliation: International Maize and Wheat Improvement Center (CIMMYT), South Asia Office, Kathmandu, Nepal.
authors.forename: Arun K
authors.initials: AK
authors.lastname: Joshi
authors.affiliation: Indian Institute of Wheat and Barley Research (IIWBR), Karnal, Haryana, India.
authors.forename: Ravish
authors.initials: R
authors.lastname: Chatrath
authors.affiliation: Indian Institute of Wheat and Barley Research (IIWBR), Karnal, Haryana, India.
authors.forename: Vikas
authors.initials: V
authors.lastname: Gupta
authors.affiliation: Banaras Hindu University (BHU), Varanasi, Uttar Pradesh, India.
authors.forename: Arun
authors.initials: A
authors.lastname: Balasubramaniam
authors.affiliation: Banaras Hindu University (BHU), Varanasi, Uttar Pradesh, India.
authors.forename: Chhavi
authors.initials: C
authors.lastname: Tiwari
authors.affiliation: Banaras Hindu University (BHU), Varanasi, Uttar Pradesh, India.
authors.forename: Vinod K
authors.initials: VK
authors.lastname: Mishra
authors.affiliation: Punjab Agricultural University (PAU), Ludhiana, Punjab, India.
authors.forename: Virinder Singh
authors.initials: VS
authors.lastname: Sohu
authors.affiliation: Punjab Agricultural University (PAU), Ludhiana, Punjab, India.
authors.forename: Gurvinder Singh
authors.initials: GS
authors.lastname: Mavi
mesh_terms: D018744:DNA, Plant / Q000235:genetics; D004777:Environment; D018745:Genome, Plant; D005838:Genotype; D007194:India; D007501:Iron / Q000032:analysis*; D008800:Mexico; D008957:Models, Genetic; D015233:Models, Statistical; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D012639:Seeds / Q000033:anatomy & histology*; D014908:Triticum / Q000737:chemistry / Q000235:genetics*; D015032:Zinc / Q000032:analysis*
chemical_list: D018744:DNA, Plant; D007501:Iron; D015032:Zinc