• 研究报告 •

### 天山北坡野生无芒雀麦的表型性状

1. （新疆农业大学草业与环境科学学院， 新疆草地资源与生态实验室， 乌鲁木齐 830052）
• 出版日期:2019-09-10 发布日期:2019-09-10

### Phenotypic traits of Bromus inermis on the northern slope of Tianshan Mountains.

GONG Ke, JIN Gui-li*, LI Chen-jian, YUE Yong-huan, WANG Hui-ning, HAN Wan-qiang

1. (College of Grassland and Environment Sciences, Xinjiang Agricultural University/Key Laboratory of Grassland Resources and Ecology of Xinjiang, Urumqi 830052, China)
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• Online:2019-09-10 Published:2019-09-10

Abstract: To reveal the phenotypic variation of Bromus inermis, we analyzed 13 phenotypic traits of 450 Bromus inermis individuals collected from five regions on the northern slope of Tianshan Mountains. The results showed variation in phenotypic traits of Bromus inermison the northern slope of the Tianshan Mountains, but with small coefficient of variation (0.294).  The variation of phenotypic traits among regions was greater than that within regions. The variation of phenotypic traits in the middle section of the northern slope of the Tianshan Mountains was significantly different from that in the eastern and western sections. The variation in the middle section increased with altitude, whereas that in the eastern and western parts showed an opposite pattern.  The 13 traits had a wide range of variation among regions, with the variation of tiller number being the largest. The trait indicators were positively correlated with the longitude and latitude. The mean annual temperature and mean annual precipitation were significantly correlated with a few traits such as ear length and root length.  The differences in phenotypic traits among regions were mainly presented in the reproductive branch height, spike length, leaf length and leaf width.  There was a large plant stature in the middle section of the northern slope of the Tianshan Mountains, and the large plant stature mainly came from the low altitude. In summary, climate in the middle section of the northern slope of the Tianshan Mountains was more suitable for the growth of Bromus inermis. The growth of Bromus inermis at low-altitude was better than those of the other two altitudes.