<p> <em>Heterodera glycines</em> or soybean cyst nematode (SCN) is one of the most yield-limiting soybean plant pathogens. The HG (<em>Heterodera glycines</em>) type test is a greenhouse test to determine the virulence of SCN populations to seven soybean “indicator” lines. Since there has not been a survey of SCN virulence phenotypes in Indiana in over a decade, a total of 124 samples were collected, and all tested positive for SCN. Of 42 selected populations for the HG type test, 88% were virulent to the soybean breeding line PI 88788, from which most SCN-resistant cultivars derive their resistance. All populations were virulent to at least one indicator line, including PI 548402 (‘Peking’), which pose problems for the future of soybean breeding for SCN. <em>Meloidogyne</em> spp. or root-knot nematodes (RKNs) are extremely damaging to agriculture, especially to specialty crops. RKN species are attracted by plant root exudates. The gene expression of <em>M. javanica</em> second-stage juveniles was determined after exposure to tomato root exudates, and the differentially expressed genes were analyzed.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/22656106 |
| Date | 19 April 2023 |
| Creators | Ricky Joe Critchfield (15317902) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/CHARACTERIZATION_OF_INDIANA_HETERODERA_GLYCINES_VIRULENCE_PHENOTYPES_AND_STUDY_RESPONSE_OF_MELOIDOGYNE_JAVANICA_TO_TOMATO_ROOT_EXUDATES/22656106 |
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