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Acta Prataculturae Sinica ›› 2025, Vol. 34 ›› Issue (2): 123-132.DOI: 10.11686/cyxb2024118

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Comprehensive evaluation of agronomic traits and yield of eight Elymus sibiricus varieties in the Qinghai-Tibet Plateau

Wen-hu WANG1,2(), Guo-ling LIANG1,2(), Wen-hui LIU1,2, Feng-yu WANG1,2, Wen LI1,2   

  1. 1.Academy of Animal and Veterinary Sciences,Qinghai University,Qinghai Academy of Animal and Veterinary Sciences,Xining 810016,China
    2.Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources,Xining 810016,China
  • Received:2024-04-10 Revised:2024-05-17 Online:2025-02-20 Published:2024-11-27
  • Contact: Guo-ling LIANG

Abstract:

The aim of this research was to comprehensively evaluate the performance of Elymus sibiricus varieties in the Qinghai-Tibet Plateau. The work was conducted in Haiyan County of Qinghai Province, and analyzed the agronomic traits and forage yield characteristics of eight E. sibiricus varieties, using a TOPSIS model to identify superior varieties. In year two, varieties designated 16-364 and 17-195 had greater plant height than other varieties (108.1 and 109.0 cm, respectively), while variety 16-093 had the highest grass height among the tested varieties (36.8 cm) and the greatest forage yield per plant (dry weight) (170.3 g). Varieties 15-025 and 17-195 had the highest tiller numbers (123 and 124 tillers of per plant, respectively). In year 3, variety 17-195 had the greatest plant height and crown breadth (122.7 cm and 140.8 cm, respectively), while variety 16-093 had the greatest grass height and forage yield per plant (51.8 cm and 234.7 g, respectively). Variety 15-025 had the highest tiller numbers (456 tillers per plant). A structural equation model showed that plant height and tiller numbers were key factors affecting E. sibiricus forage yield. The TOPSIS model multivariate evaluation showed that the variety 16-093 ranked highest for forage productivity and stability, making it a suitable variety for cultivation in the study region. Therefore, variety 16-093 could be used as parent material for new variety breeding as a next step.

Key words: Elymus sibiricus, production performance, varieties, forage, comprehensive evaluation