Introduction. The soybean cyst nematode (SCN), Heterodera glycines, is an important pathogen of soybeans (Glycine max) worldwide . Heterodera glycines, etc ; haplotypes; host plants; immunity; loci; pests; phenotype; ... (SCN; Heterodera glycines) reproduces on a wide range of plants, including some cover crops. However, reproduction of SCN populations on a number of cover crops has not been investigated in the northern Great Plains. Authors: Talon Becker and Nathan Kleczewski. It has a broad host range, up to 100 plant species world wide, some selected common hosts are listed in Table 2 Among the various soybean pests, Heterodera glycines Ichinohe, known by most as soybean cyst nematode (SCN), continues to be a persistent cause of yield loss for soybean producers 1.. SCN has been found in every county in Illinois, as well as much of the eastern United States, Puerto Rico, and parts of Hawaii and Canada 2 (Figure 1). Plant parasitic nematodes present a major problem for the cultivation of Glycine max (soybean) –.Among them, the dominant problem is the soybean cyst nematode, Heterdera glycines –, . Heterodera glycines 3 Table 1. This genome sequence is an important prerequisite to enable work towards gene rating new resistance or control measures against H. glycines. 6. 3. Measurements of Heterodera glycines (after Taylor, 1975 and Graney & Miller, 1982) Mean Average range Cysts Fenestra length (µm) 55 (30-70) width (µm) 42 (25-60) Vulval slit length (µm) 53 (43-60) Control Heterodera glycines without plant residues Soybean cyst nematode 1.09±0.08 (14) 29.47±3.11 (24) Note: Data are presented as means ± standard error, followed by ranking order in parentheses. Salaries and research support were provided in part by State and glycines biology and shed light onto the mystery underlying complex host-parasite interactions. Soybean cyst nematode (SCN; Heterodera glycines) reproduces on a wide range of plants, including some cover crops.However, reproduction of SCN populations on a number of cover crops has not been investigated in the northern Great Plains. Weed Hosts of Soybean Cyst Nematode (Heterodera glycines) in Ohio1 RAMARAO VENKATESH, S. KENT HARRISON, and RICHARD M. RIEDEL2 ... SCN has a relatively broad host range, but its only ' Received for publication June 17, 1999, and in revised form November 8, 1999. Fig. Although there are genetic determinants that render soybean plants resistant to certain nematode genotypes, resistant soybean cultivars are increasingly ineffective because their multi-year … Distribution map of Heterodera glycines in USA: A: distribution in 1962; B: distribution in 2002. This nematode has a broad host range including other legumes, some ornamentals, and a number of common weeds. Keywords: Heterodera glycines, SCN, Soybean cyst nematode, Genome, Tandem duplication, Effector, Evolution To quantify allele frequencies related to host range and virulence in natural Heterodera populations. Heterodera glycines , commonly referred to as the soybean cyst nematode (SCN), is an obligatory and sedentary plant parasite that causes over a billion-dollar yield loss to soybean production annually. 8. Host The soybeans are the most economic important host for H. glycines. To investigate the basis of host range in H. glycines. H. glycines has a relatively limited host range and can thus be managed by appropriate crop rotation with non-hosts.A two year rotation with a non-host is usually sufficient to reduce populations to a non-damaging level. Heterodera glycines, commonly referred to as the soybean cyst nematode (SCN), is an obligatory and sedentary plant parasite that causes over a billion-dollar yield loss to soybean production annually.