Distribution of 18s rDNA variants of Diderma hemisphaericum (Myxomycota) specimens obtained from moist chambers of materials collected in the Philippines and Vietnam

Abstract

© 2019 Association of Systematic Biologists of the Philippines. Since there are only limited biogeographic studies of myxomycetes in Southeast Asia, this study was conducted to assess the molecular diversity of Diderma hemisphaericum, a cosmopolitan myxomycetes species that abundantly occurs in most moist chamber collections in tropical Southeast Asia. Specimens that contain D. hemisphaericum were gathered from various parts of the Philippines: (i) Los Banos, (ii) Calauan, (iii) Basud, (iv) Isarog and (v) Malilipot; and Vietnam: (i) Thai Nguyen (ii) Ha Noi and (iii) Da Nang. Using modern molecular techniques, the common barcode nuclear marker 18S rDNA for myxomycetes was targeted for the 50 specimen used in this study. A total of 27 ribotypes (11 from the Philippines and 16 from Vietnam) were obtained. The Mantel test showed that genetic differentiation among ribotypes is not correlated with geographic distances. The FST index (0.083) indicates high genetic intermixing between the Philippines and Vietnam. Hence, it seems that the variation across regional scale gene pool is not directly influenced by geographic isolation but rather by environmental selection.

Source or Periodical Title

Philippine Journal of Systematic Biology

ISSN

19086865

Page

19-28

Document Type

Article

Subject

AMOVA, Biogeography, Long distance dispersal, Ribotype, Slime molds, Tropics

This document is currently not available here.

Share

COinS