中国野生老芒麦形态多样性研究与种质利用潜力分析  

Morphological diversity and germplasm utilization potential of wild Elymus sibiricus

作　　者：李春艳 王艳 李欣瑞 李英主 李明峰 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] LI Chun-yan;WANG Yan;LI Xin-rui;LI Ying-zhu;LI Ming-feng;CHEN Li-li;LEI Xiong;YAN Li-jun;YOU Ming-hong;JI Xiao-fei;ZHANG Chang-bing;WU Qi;GOU Wen-long;LI Da-xu;YAN Jia-jun;BAI Shi-qie(Sichuan Academy of Grassland Sciences,Chengdu 611743,China;Institute of Qinghai-Tibetan Plateau,Southwest Minzu University,Chengdu 610041,China;College of Grassland Science and Technology,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[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

出　　处：《草业学报》2023年第3期67-79,共13页Acta Prataculturae Sinica

基　　金：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)资助。

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。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.

关 键 词：老芒麦 形态多样性 聚类分析 主成分分析 

分 类 号：S543.9[农业科学—作物学]