At the DHF, we use our own haploid inducing lines (ISURF #04099) for all induction crosses. BHI306 and closely related lines have the R1-nj kernel color marker and the Pl1 root color marker for visual haploid selection. They also have the Ga1 allele, that allows to overcome partial dent sterility often present in popcorn backgrounds. All induction crosses are done by hand-pollination. The induction rate in field corn, popcorn and sweet corn varies in the range of 8-15% depending of the genetic background of the female/donor population. Continue
Left: haploid inducer planted in several delays
Right: female/donor plants