Reference Report for SoyBase12402856
| Title: | Molecular characterization of soybean cyst nematode populations with different parasitism index to the Hartwig cultivar |
| Authors: | Abdelnoor, R.V., Dias, W.P., Silva, J.F.V., Marin, S.R.R., Kiihl, R.A. de S. |
| Source: | Pesq. Agrop. Brasil. 2001, 36(2):331-337 |
| Abstract: | Recently, a new race of soyabean cyst nematode (SCN) (Heterodera glycines) was discovered, which breaks the resistance of cultivar Hartwig, resistant to all known races of SCN. This population was obtained from soyabean plants collected in Sorriso county, state of Mato Grosso, Brazil, and was characterized as race 4. To verify if this isolate was different from others classified as races 4 and 9, their genetic diversity was analysed by using the RAPD (random amplified polymorphic DNA) technique. Nine populations of SCN were analysed, and only 4 populations were able to parasitize Hartwig. Based on this study, it was verified that the populations that broke the Hartwig resistance were different from other populations. Based on cluster analysis, the populations were separated into 4 groups. Race 4 and 9 populations were placed in the first and second groups, respectively, while those capable of breaking the Hartwig resistance were placed in a third group. |
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