A er spontaneous or induced genome doubling, double haploids (DHs) that are completely homozygous are obtained. e production of haploid plants can be induced by methods such as parthenogenesis, interspeci c hybridization, pollination with irradiated pollen, hormonal and/or chemical treatment, and application of high-temperature stress (Forster et al., 2007; Murovec and Bohanec, 2013).