Related Experiment Video
Updated: Jan 29, 2026

Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice Oryza sativa ssp.
Published on: January 28, 2020
Characterization of Diversity Among Isolates of Rhizoctonia oryzae-sativae from California Rice Fields
Patcharavipa Chaijuckam1, R Michael Davis1
1Department of Plant Pathology, University of California, Davis 95616.
Abstract:
Thirty-one California isolates of Rhizoctonia oryzae-sativae, the cause of aggregate sheath spot of rice, were characterized by culture morphology, pathogenicity tests, somatic compatibility groups (SCGs), single-locus microsatellites (SLMs), and multilocus microsatellites (MLMs). The highest level of diversity (individual isolates) was described by MLMs whereas pathogenicity tests exhibited the lowest resolution. In general, a high degree of diversity was revealed (diversity from 51.6 to 100%) within the California population. Several lines of evidence indicated sexual reproduction in the population of R. oryzae-sativae. Genetic analyses of SLMs and MLMs revealed high genetic diversity and gametic equilibrium of all SLMs and most MLMs. Furthermore, unique individuals were recovered by MLMs and there was no correlation of phenotypes to either SCGs or genetic markers. In addition, incongruence of parsimonious trees generated from each of five primers of MLMs and a poorly resolved consensus tree inferred from the combined data set were demonstrated. Accordingly, sexual reproduction of R. oryzae-sativae is probably more prevalent in California than previously assumed.
More Related Videos
05:22Transverse Sectioning of Mature Rice Oryza sativa L. Kernels for Scanning Electron Microscopy Imaging Using Pipette Tips as Immobilization Support
Published on: January 25, 2022
07:36Visualizing Early Infection Sites of Rice Blast Disease Magnaporthe oryzae on Barley Hordeum vulgare Using a Basic Microscope and a Smartphone
Published on: March 17, 2023
Related Concept Videos
Diversity of Archaea I
Cell Diversity
Multicellular...
Diversity of Archaea II
Diversity of Protists I
Diversity of Protists II
Introduction to Plant Diversity