Morphology and Genetic Diversity of Phragmites australis in Beijing
Received date: 2020-01-14
Accepted date: 2020-08-26
Online published: 2020-08-26
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
Xi Zhang, Tianhang Qiu, Anan Wang, Huajian Zhou, Min Yuan, Li Li, Sulan Bai, Suxia Cui . Morphology and Genetic Diversity of Phragmites australis in Beijing[J]. Chinese Bulletin of Botany, 2020 , 55(6) : 693 -704 . DOI: 10.11983/CBB20006
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