Haploid Embryos: Being Like Mommy or Like Daddy?

In planta haploid embryo induction is a powerful plant breeding tool, but is limited to very few crops. Two recent studies by Wang et al. and Lv et al. report seed-based haploid systems that produce paternal haploid embryos by engineering CENTROMERIC HISTONE H3 (CENH3). Together with recent translation of maize maternal haploid induction ability into wheat and rice, this extends our collection of haploid inducer lines.