The current status of small populations of common reed, Phragmites australis, in eastern Shiga Prefecture, Japan

DOI Web Site

Bibliographic Information

Other Title
  • 滋賀県湖東地域に現存するヨシ小集団の生育状況
  • シガケン コトウ チイキ ニ ゲンソン スル ヨシ ショウシュウダン ノ セイイク ジョウキョウ

Search this article

Abstract

We explored the current status of sexual reproduction and clonal growth in six populations of the common reed, Phragmites australis, in eastern parts of Shiga Prefecture and Mizoroga-ike pond in Kyoto Prefecture. At each population, we determined genets using six SSR markers and investigated seed set and ploidy levels. Genet diversity was high in four populations, three of which also had high seed set. In contrast, two other populations were composed of a single genet and had very low seed set. Similarly low genetic diversity and seed set has been previously reported for some large populations surrounding Lake Biwa and Naiko. We germinated seedlings to determine ploidy levels for the populations and found tetraploid, hexaploid, and octaploid individuals. Hexaploid individuals may be a result of mating between individuals of different ploidy levels. We found no seedlings, even in populations composed of several genets, suggesting inappropriate environmental conditions for seedlings, such as flooding, high water levels and lack of open patches. This suggests that these populations are maintained by prolonged clonal growth, not by the recruitment and establishment of seeds.

Journal

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top