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Variation in spacer ribosornal DNA in sorne cyst-forming species of plant parasitic nernatodes
The findings confirm the utiliry of gene and spacer region rDNA for systematic inference among species and genera of cyst nematodes and confirm theutilite des genes, et des regions intergeniques du rDNA in relation to relations systematiques with each other.
Figure 1. Shown in red are counties with confi rmed infestation of soybean cyst nematode in Indiana. Figure 2. Above ground symptoms of SCN damage to soybean. Symptoms of SCN injury can easily be
Association of RFLP markers with loci conferring broad-based resistance to the soybean cyst nematode (Heterodera glycines)
This complete mapping will accelerate the transfer of broad-based resistance without linkage drag and aid in the determination of relationships among various SCN-resistant germplasm sources.
Regional Assessment of Soybean Brown Stem Rot, Phytophthora sojae, and Heterodera glycines Using Area-Frame Sampling: Prevalence and Effects of Tillage.
The prevalence of brown stem rot, H. glycines, and Phytophthora sojae in the north central United States was investigated during the fall of 1995 and 1996 and both the prevalence and population densities were consistently greater in tilled than in no-till fields in all states for which tillage information was available.
Comparisons of Isolates of Heterodera avenae using 2-D PAGE Protein Patterns and Ribosomal DNA.
Six geographic isolates of Heterodera avenae, including two isolates each from Sweden, Australia, and the United States, were compared on the basis of 2-D PAGE protein patterns and the complete DNA
A Standard Greenhouse Method for Assessing Soybean Cyst Nematode Resistance in Soybean: SCE08 (Standardized Cyst Evaluation 2008)
The authors' objective was to offer a set of standards for assessing and labeling SCN-resistant cultivars that would allow farmers to make direct comparisons of cultivars.
An Efficient New Device to Release Eggs From Heterodera glycines.
A new apparatus to release eggs from cysts of soybean cyst nematode (Heterodera glycines) is described and its efficiency was fast and efficient, and had no ill effect on prepared inoculum.
Phylogenetic Relationships of Globodera millefolii, G. artemisiae, and Cactodera salina Based on ITS Region of Ribosomal DNA.
Phylogenetic analysis indicated that, based on the ITS rDNA data, G. millefolii and G. artemisiae are more closely related phylogenetically to the Cactodera species than to other nominal Globoderaspecies.
Soybean Cyst Nematode Reproduction in the North Central United States.
An experiment was conducted in Heterodera glycines-infested fields in 40 north central U.S. environments (21 sites in 1994 and 19 sites in 1995) to assess reproduction of this nematode. Two resistant
Soybean resistance to field populations of Heterodera glycines in selected geographic areas.
Data were collected 2006 through 2008 from 527 soil samples to determine the current effectiveness of PI 88788 and other sources of Heterodera glycines resistance in three geographically separated