植物学报 ›› 2020, Vol. 55 ›› Issue (6): 693-704.DOI: 10.11983/CBB20006

• 研究报告 • 上一篇    下一篇

北京地区芦苇资源状态及其多样性

张茜, 裘天航, 王安安, 周华健, 袁敏, 李利, 白素兰, 崔素霞*()   

  1. 首都师范大学生命科学学院, 北京 100048
  • 收稿日期:2020-01-14 接受日期:2020-08-26 出版日期:2020-11-01 发布日期:2020-11-11
  • 通讯作者: 崔素霞
  • 作者简介:*E-mail: sxcui@cnu.edu.cn
  • 基金资助:
    科技创新服务能力建设-基本科研业务费(科研类)(19530050183)

Morphology and Genetic Diversity of Phragmites australis in Beijing

Xi Zhang, Tianhang Qiu, Anan Wang, Huajian Zhou, Min Yuan, Li Li, Sulan Bai, Suxia Cui*()   

  1. College of Life Sciences, Capital Normal University, Beijing 100048, China
  • Received:2020-01-14 Accepted:2020-08-26 Online:2020-11-01 Published:2020-11-11
  • Contact: Suxia Cui

摘要: 为探明北京地区芦苇(Phragmites australis)的资源状态和多样性, 实地考察北京主要河流、湿地和水库, 发现北京地区芦苇总生长面积已超过600 hm2。芦苇染色体倍性以八倍体为主, 四倍体次之。在面积较大的湿地内, 八倍体单一芦苇群落占据优势地位; 而在城市的浅河内有形态和遗传性多样的混合种群。研究表明, 植物性状和倍性水平之间无显著相关性。在小清河发现了6种形态各异的芦苇克隆, 均属于叶绿体DNA片段的P单倍型; 其单倍体基因组大小为(0.499±0.019) pg, 变异系数为3.8%。这表明表型与单倍型之间也不具相关性。此外, 发现1个具有变叶特性的芦苇, 将其命名为金条芦苇。北京地区芦苇形态和遗传多样性为研究芦苇基因型与环境适应性之间的关系提供了珍贵的资源。

关键词: 染色体倍性, 单倍型, 芦苇, 多态性, 变种

Abstract: To understand the distribution and diversity of Phragmites australis in Beijing, we carried out field investigation to Beijing’s major rivers, wetlands and reservoirs, which reveals that the total area of reed populations has reached more than 600 hm 2 in Beijing. The ploidy level is dominated by octaploid, followed by tetraploid. In larger wetlands, the single community of octoploid occupies a dominant position; while in shallow urban rivers, the mixed populations with different morphological, ploidy and genetic diversity are common. There is no significant correlation between the plant traits and ploidy level variation. Six different reed clones were found in Xiaoqing River, all belonging to P haplotypes. The haploid genome size of all clones ranged from (0.499±0.019) pg, with a coefficient of variation of 3.8%. These results show that there is no correlation between phenotype and haplotype. In addition, a reed variant with versicolor leaf characteristics was discovered and named as Phragmites australis var. australis f. Goldstripe. The morphology and genetic diversity of Phragmites in Beijing provide valuable resources for future study of the relationship between reed genotypes and environmental adaptability.

Key words: ploidy level, haplotype, Phragmites australis, polymorphism, variant