1015 doubled-haploid (DH) lines derived from three European maize landraces (516 KE, 67 LL, 432 PE) were phenotyped for line perse and testcross performance in up to eleven and seven environments, respectively. In total, 25 morphological, agronomic and early-development-related traits were measured. For a detailed description of the data, see Hölker et al. (2019):
Hölker AC, Mayer M, Presterl T, Bolduan T, Bauer E, Ordas B, Brauner PC, Ouzunova M, Melchinger AE, Schön CC (2019) European maize landraces made accessible for plant breeding and genome-based studies.
Theor Appl Genet 132:3333-3345, doi.org/10.1007/s00122-019-03428-8
Data of line per se evaluations for 9 traits in up to 11 environments for 899 double-haploid lines (471 KE, 402 PE, 26 LL), as used for the GWAS analyses in Mayer et al. 2020 are available via https://doi.org/10.6084/m9.figshare.12137142. The dataset is described in detail in Mayer et al. 2020 and Mayer et al.2022.
Mayer M, Hölker AC, González-Segovia E, Bauer E, Presterl T, Ouzunova M, Melchinger AE, Schön CC (2020) Discovery of beneficial haplotypes for complex traits in maize landraces. Nature Commun 11:4954, doi.org/10.1038/s41467-020-18683-3
Mayer M, Hölker AC, Presterl T, Ouzunova M, Melchinger AE, Schön CC (2022) Genetic diversity of European maize landraces: Dataset on the molecular and phenotypic variation of derived doubled-haploid populations. Data in Brief 42:108164, doi.org/10.1016/j.dib.2022.108164
A rapid cycling genomic selection experiment with three selection cycles was successfully implemented. 688 DH lines from seven populations selected for early developmental traits were phenotyped for line per se performance. Field trials were conducted in seven environments (location × year combinations) covering a wide range of agro-climatic conditions in Germany, and four agronomic traits were evaluated.
The selection experiment is described in:
Polzer C, Auinger HJ, Terán Pineda M, Hölker AC, Mayer M, Presterl T, Rivera Poulsen C, da Silva S, Ouzunova M, Melchinger AE, Schön CC (2025) Rapid cycling genomic selection in maize landraces. Theor Appl Genet 138,75; doi.org/10.1007/s00122-025-04855-6
Additionally, 204 DH lines from four populations selected for testcross biomass yield were phenotyped for testcross performance. Field trials were conducted in seven environments (location × year combinations) covering a wide range of agro-climatic conditions in Germany, and six agronomic traits were evaluated.
Rivera-Poulsen C, Polzer C, Hölker AC, Presterl T, da Silva S, Terán-Pineda M, Ouzunova M, Melchinger AE, Schön CC. (2025) Rapid cycling genomic selection in maize landraces – a step towards closing the yield gap. Theor Appl Genet.139, doi.org/10.1007/s00122-025-05107-3
Early root architectural traits for 925 doubled-haploid DH lines derived from three European maize landraces (485 KE, 21 LL, 419 PE) were measured under cold conditions in the GrowScreen-PaGe phenotyping platform (Gioia et al. 2016). The dataset is described in Guffanti et al. (in preparation).
Gioia T, Galinski A, Lenz H, Müller C, Lentz J, Heinz K, Briese C, Putz A, Fiorani F, Watt M, Schurr U, Nagel KA (2016) GrowScreen-PaGe, a non-invasive, high-throughput phenotyping system based on germination paper to quantify crop phenotypic diversity and plasticity of root traits under varying nutrient supply. Functional Plant Biology 44:76-93, doi.org/10.1071/FP16128
Guffanti F, Nagel K, Pariyar S, Scheuermann D, Urbany C, Presterl T, Ouzunova M, Schön CC. Uncovering root diversity in landraces to improve agronomic traits. In preparation