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草业学报 ›› 2023, Vol. 32 ›› Issue (3): 67-79.DOI: 10.11686/cyxb2022132

• 研究论文 • 上一篇    下一篇

中国野生老芒麦形态多样性研究与种质利用潜力分析

李春艳1,2(), 王艳2(), 李欣瑞1,3(), 李英主1, 李明峰1,2, 陈丽丽1, 雷雄1, 闫利军1, 游明鸿1, 季晓菲1, 张昌兵1, 吴婍1, 苟文龙1, 李达旭1(), 鄢家俊1(), 白史且1()   

  1. 1.四川省草原科学研究院,四川 成都 611743
    2.西南民族大学青藏高原研究院,四川 成都 610041
    3.四川农业大学草业科技学院,四川 成都 611130
  • 收稿日期:2022-03-25 修回日期:2022-05-30 出版日期:2023-03-20 发布日期:2022-12-30
  • 通讯作者: 李达旭,鄢家俊,白史且
  • 作者简介:E-mail: baishiqie@126.com
    E-mail: 51037529@qq.com
    E-mail: ldx136@163.com
    李春艳(1996-),女,云南昭通人,在读硕士。 E-mail: lichunyan961028@163.com
    王艳(1991-),女,甘肃白银人,硕士。E-mail: 2998378084@qq.com
    李欣瑞(1996-),男,内蒙古呼伦贝尔人,在读博士。E-mail: 810106355@qq.com第一联系人:共同第一作者These authors contributed equally to this work.
  • 基金资助:
    四川省“十四五”饲草育种攻关-高寒牧区多用途牧草新品种选育及配套技术研究(2021YFYZ0013-2);四川省重点研发项目-抗逆生态型草新品种选育、退化草地治理技术研究与示范(2019YFN0170);国家种质资源红原观测实验站(NAES020GR04)

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

摘要:

为揭示野生老芒麦形态变异特征和遗传背景,对我国野生老芒麦主要分布区域不同生态类型的104个居群520份野生老芒麦种质进行了23个形态指标测定和遗传多样性分析。结果表明:不同生境老芒麦材料的形态特征存在显著差异,数量性状变异系数为9.49%~49.56%;聚类分析将104个居群分为具有各自明显特征和开发利用潜力的4类;形态特征与地理环境因子的相关性分析发现,野生老芒麦抽穗早晚及茎秆叶鞘基部小刺等特殊性状与其海拔呈显著相关;主成分分析发现,株高、抽穗、茎节数、单株干鲜重、旗叶长宽等指标代表了老芒麦67.79%形态多样性,是造成老芒麦形态特征变异的主要因素,可作为老芒麦形态分化的重要参考指标。

关键词: 老芒麦, 形态多样性, 聚类分析, 主成分分析

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