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Study on the agronomic characters of several perennial species in Triticeae and their hybrids

YU Zhuo, LI Zaozhe, YUN Jinfeng (Inner Mongolia Agricultural University, Huhhot 010019, China)  
The agronomic characters of several perennial Triticeae grasses and their hybrids, such as growthdevelopment, forage yield and so on, were studied. The results showed that growth rate of genus hybrid F1 of Elymus canadensis×Hordeum brevisubulatum tended maternal, the plant height was in the middle of parents. F1 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 F1 of Agropyron mongolicum ×A.cristatum cv. Fairway were in the middle of parents. F1 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(BC1) 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 BC1 was restored obviously.
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