关键词: 无芒雀麦, 产量, 农艺性状, 高寒区, 生产性能

Abstract: In order to select high yielding and high quality Bromus inermis varieties for the Qinghai-Tibet Plateau,this experiment was conducted to evaluate the production performance and agronomic traits of 51 Russian introduced B. inermis germplasms resources by analysis on diversity,correlation,stability and affiliation functions,and to provide a basis for further selection of high quality B. inermis materials. The results showed that the increase in thousand kernels weight and leaf percentage could significantly increase the seed yield;the increase in plant height,stem thickness,total number of tillers,spike percentage,leaf area and root dry weight could significantly increase forage yield;there were significant differences (P<0.05) in seed yield for all tested materials in both 2018 and 2019,with B21 and B49 performing best in seed yield;B12 performed best in forage yield,with a significant difference (P<0.05) from 2018 to 2020;the forage yield and seed yield of B. inermis showed a decrease trend with increment of growing years. In terms of stability of production,both forage yield and seed yield were the highest in the first growing year,and the optimal use of the variety was for 2~3 years. B21 and B49 varieties had the best performance in seed yield and seed yield traits,with a high potential to be developed into long-term seed yielding varieties. B30,B12 and B49 varieties had the best performance in forage yield and forage yield traits with a great potential to be developed into long-term forage-producing varieties. The B49 variety had the best overall performance and could be used as a target parent for seed and forage-producing breeding.

Key words: Bromus inermis, Yield, Agronomic traits, Alpine zone, Production performance