ABSTRACT We analyzed the genetic structure of Bursaphelenchus xylophilus populations within individual trees (subpopulations) in three distant pine forests (Tanashi, Tsukuba, and Chiba in Japan) based on the polymorphism of four microsatellite (SSR) markers. Most of the nematodes from subpopulations in Tanashi showed the same genotype over 2 years, indicating that nematodes of that genotype dominated there for years. In contrast, 16 and 15 genotypes were identified in nematode populations from Tsukuba and Chiba, respectively. Despite the high genetic diversity within the Tsukuba and Chiba populations, extremely low genetic diversity was observed within the subpopulations. The genetic difference between the Tsukuba and Chiba populations was significantly smaller than that between Tanashi and either Tsukuba or Chiba. Observed heterozygosity was significantly less than expected based on Hardy-Weinberg equilibrium. These findings are best explained by a founder effect, geographic isolation between populations, explosive nematode multiplication from a small number within individual trees, and the Wahlund effect.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1094/PHYTO-97-3-0304 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Purpose: Both clinical knowledge and patient care ownership (PCO) are crucial to the provision of quality patient care and should be acquired during training. However, the association between these two concepts is under-examined. Here, we conducted a nationwide cross-sectional study to investigate the association between clinical knowledge and PCO among resident physicians in Japan.
View Article and Find Full Text PDFPropagation of neuronal micronuclei regulates microglial characteristics.
Nat Neurosci
January 2025
School of Integrative and Global Majors, University of Tsukuba, Tsukuba, Japan.
Microglia-resident immune cells in the central nervous system-undergo morphological and functional changes in response to signals from the local environment and mature into various homeostatic states. However, niche signals underlying microglial differentiation and maturation remain unknown. Here, we show that neuronal micronuclei (MN) transfer to microglia, which is followed by changing microglial characteristics during the postnatal period.
View Article and Find Full Text PDFDielectric properties depend on the crystal structure of perovskite-type RbTaO synthesized at high pressure.
Dalton Trans
January 2025
Graduate School of Engineering and Science, Shibaura Institute of Technology, 307 Fukasaku, Minuma, Saitama, 337-8570, Japan.
We successfully synthesized perovskite-type RbTaO at 1173 K under 4 GPa. RbTaO crystalized as a cubic system (3̄ space group (SG), = 4.04108(3) Å) at 300 K in contrast to the orthorhombic perovskite-type RbNbO prepared under the same conditions.
View Article and Find Full Text PDF2023 National Clinical Database Annual Report by the Japan Surgical Society.
Surg Today
January 2025
Japan Surgical Society, Tokyo, Japan.
Discovery of bicyclic borane molecule BH.
Commun Chem
January 2025
The Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
The discovery of fullerene following the synthesis of graphene marked a paradigm shift in chemistry. Here, we report the discovery of biycycloborane, arising from the synthesis of borophane (hydrogen boride). Uniquely, this synthesis method involves a decomposition mechanism rather than traditional atom-by-atom assembly, marking an unique approach to constructing complex borane structures.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!