Seed Yield Comparison of Bromus inermis Germplasm in the Alpine Qinghai-Tibet Plateau
To identify seed-producing Bromus inermis germplasm well-suited for the alpine region of the Qinghai-Tibetan Plateau,we evaluated 14 high forage yield lines for seed yield,nutritional composi-tion,and seed viability in Xihai Town,Haibei Prefecture,Qinghai Province.This data will support the development of grain-forage cultivars for the region.The results showed that excluding B10,seed yield across germplasm lines exhibited interannual variation(P<0.05),with B14 demonstrating the highest two-year cumulative yield(8314.99 kg/hm2).Correlation analysis revealed significant positive correla-tions(P<0.05)between seed yield and following yield components:effective tiller,seed number per inflo-rescence,seed weight per inflorescence,and spikelet width Among these components,effective tiller exhibited the strongest correlation with seed yield and had the greatest direct effect on seed yield potentials.Therefore,effective tiller number could serve as a key selection criterion in the evaluation of seed yield.Based on a comprehensive evaluation of yield,nutritional quality and seed vigor,germplasm lines B14,B13,and B10 demonstrated the greatest overall performance,indicating their potential for cultivation in the Qinghai-Tibet Plateau's alpine region.
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