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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (3): 67-79.DOI: 10.11686/cyxb2022132

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Morphological diversity and germplasm utilization potential of wild Elymus sibiricus

Chun-yan LI1,2(), Yan WANG2(), Xin-rui LI1,3(), Ying-zhu LI1, Ming-feng LI1,2, Li-li CHEN1, Xiong LEI1, Li-jun YAN1, Ming-hong YOU1, Xiao-fei JI1, Chang-bing ZHANG1, Qi WU1, Wen-long GOU1, Da-xu LI1(), Jia-jun YAN1(), Shi-qie BAI1()   

  1. 1.Sichuan Academy of Grassland Sciences,Chengdu 611743,China
    2.Institute of Qinghai-Tibetan Plateau,Southwest Minzu University,Chengdu 610041,China
    3.College of Grassland Science and Technology,Sichuan Agricultural University,Chengdu 611130,China
  • Received:2022-03-25 Revised:2022-05-30 Online:2023-03-20 Published:2022-12-30
  • Contact: Da-xu LI,Jia-jun YAN,Shi-qie BAI

Abstract:

This study investigated the morphological variation exhibited among, and genetic background of 104 wild populations of Elymus sibiricus. Data were collected on 23 morphological indexes and genetic diversity of 520 wild E. sibiricus from the 104 populations, representing different ecological types in the main distribution areas of wild E. sibiricus in China. Significant differences were found in morphological characteristics of E. sibiricus germplasm in different habitats, and the coefficient of variation for quantitative characters ranged from 9.49% to 49.56%. Results of a cluster analysis indicated that the 104 populations could be grouped into four categories with distinct morphological characteristics and development and utilization potential. Correlation analysis showed that some particular traits such as heading, plant height and flag leaf length of wild E. sibiricus were significantly correlated with altitude. Furthermore, a principal component analysis showed that five traits (plant height, heading or not, number of stem nodes, dry and fresh weight per plant, flag leaf length and width) accounted for 67.79% of the morphological diversity of E. sibiricus, and these traits were the main the main sources of morphological variation in E. sibiricus and could be used as an important reference index of morphological variation in E. sibiricus.

Key words: Elymus sibiricus, morphological diversity, cluster analysis, principal component analysis