EMBRYO DEVELOPMENT IN 2 BARLEY GENOTYPES AFTER SELF POLLINATION AND POLLINATION WITH HORDEUM-BULBOSUM L

Embryo development in vivo was compared in the two barley genotypes VK 16032 and 'Vogelsanger Gold' after self pollination and after pollination with H. bulbosum. Embryo growth in VK 16032 after crossing with H. bulbosum showed a similar growth pattern to that of the self pollinated embryos, although the size increase was smaller. The hybrid embryos continued to grow until day 18 after pollination. The embryos from the cross between 'Vogelsanger Gold' and H. bulbosum ceased to grow 8 days after pollination. Arrested embryo growth with subsequent abortion in 'Vogelsanger Gold' was associated with a very early depletion and break down of the endosperm. Use of barley genotypes less sensitive to the genomic disturbances after crossing with H. bulbosum in combination with genotypes like 'Vogelsanger Gold' is recommended in haploid breeding work.