Diversity Array Technology based genetic polymorphism data of maize inducer and noninducer lines

Inducer lines are a critical component of the maize Doubled Haploid (DH) technology, which allows for the rapid development of homozygous inbred lines, saving time and resources. Here, we present a dataset of genetic polymorphisms of a diverse panel of 159 North American and European haploid inducers, genotyped with the Diversity Array Sequencing Technology (DArTseq). We also present a dataset of genetic polymorphisms of a panel of 793 noninducer maize genotypes, which were genotyped with the Diversity Array Sequencing Technology (DArTseq) too. The inducer panel was employed for a quantitative Genome-Wide Association Study (GWAS) analysis, whereas the inducer and noninducer panels were jointly employed for a case-control GWAS. A total of 9007 Single Nucleotide Polymorphism (SNP) markers were employed for both GWAS. The haploid induction rate (HIR) of each inducer was accessed across two planting dates (Trentin et al. 2023). Lack of significant induction ability in the panel of non-inducer genotypes was assumed, and verified by growing them in the field, were no haploid plants were observed. This is in accordance with Chase's (1947) observation that the occurrence of haploid plants in elite inbred lines happens at very low frequencies (<0.1%) (Trentin et al. 2023). Genetic diversity among inducer lines is essential for creating new haploid-inducer lines and enhancing the efficiency of DH line production. We invite the scientific community to access and utilize this dataset, which holds significance for developing next generation haploid inducers. This data can be used further in SNP based- or haplotype based-GWAS and genomic selection (GS). Sharing this genetic polymorphism data in a public repository will facilitate collaboration, accelerate research, and contribute to the advancing maize research and breeding.