Embryo Rescue - Many distant crosses fail due to degeneration of endosperm. In such cases, embryo culture is used to recover hybrid plants; this is called hybrid rescue. Embryo culture, has been widely used for this purpose. Some recent examples are the recovery of hybrids from H. vulgare x Secale creale, T. aestivum x Agropyron repens, H. vulgare x Triticum species, including T. aestivum, etc.

Hybrid seeds from T. aestivum X H. vulgare are not obtained, but hybrid seedlings have been obtained by embryo culture. Hybrid embryos from 9-12 day old caryopses were removed and placed on 14-18 day old barley endosperm cultured on a nutrient medium. A high proportion of hybrid embryos developed into seedlings when they were thus cultured.