硬粒小麦与珍珠栗远缘杂交的受精作用和胚胎发育

对硬粒小麦(Triticum durum Desf.)和珍珠栗(Pennisetum glaucum syn.P. americanum)远缘杂交的受精作用和胚胎发育进行了研究。对授粉后的192个硬粒小麦子房进行制片观察，7.81％发生双受精，具胚和胚乳，但胚乳发育往往落后于胚的发育；3.13％只发生了单卵受精，只产生胚而无胚乳；1.04％发生了单极核受精，只产生胚乳而无胚。总受精率为11.98％，成胚率为10.94％。由于胚乳的缺乏或发育异常及败育，最终难以获得有生活力的种子。

Fertilization and Embryo Dvelopment in Hybridization Between wheat and Pearl millet

The fertilization and embryo development in wide crosses of Triticum durum Desf. and Pennisetum glaucum syn. P. americanum were studied. In a sample of 192 florets fixed after pollination, 7. 81% had double fertilization and had embryo and endosperm, but endosperm development was slower than that of the embryos, 3.13% had only embryo and 1.04% had only endosperm. The frequency of fertilization and embryo formation were 11.98% and 10. 94%. Because the endosperms were abnormal, it was very difficult to produce viable mature seeds.