Study on the agronomic characters of several perennial species in Triticeae and their hybrids
YU Zhuo, LI Zaozhe, YUN Jinfeng (Inner Mongolia Agricultural University, Huhhot 010019, China)
The agronomic characters of several perennial Triticeae grasses and their hybrids, such as growthdevelopment, forage yield and so on, were studied. The results showed that growth rate of genus hybrid F1 of Elymus canadensis×Hordeum brevisubulatum tended maternal, the plant height was in the middle of parents. F1 hybrid had the characters of strong short rhizome and long growth period after fructification from paternal and had the strong vigor of tiller and regeneration; the pollen fertility rate was 1.19%, the seed set was 0, and the average hybrid preponderance (HP) was 16.98%. The growth rate and plant height of species hybrid F1 of Agropyron mongolicum ×A.cristatum cv. Fairway were in the middle of parents. F1 hybrid had the stronger vigor of tiller and regeneration from paternal; the pollen fertility rate was 26.75%, the seed set was 5.30%, the average HP was 19.35%; The growth rate of backcross 1(BC1) of (A.mongolicum×A.cristatum cv. Fairway)×A.mongolicum was mixed type of their parents, the plant height and the vigor of tiller and regeneration tended to recurrent paternal; the pollen fertility rate was 46.67%, the seed set was 14.77%, and the fertility of BC1 was restored obviously.