Skip to main content
ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #179920

Title: QTL MAPPING OF RESISTANCE TO SOYBEAN CYST NEMATODE RACES 1, 2, AND 5 IN SOYBEAN PI 404198A

Author
item GUO, B
item SLEPER, DAVID
item NGUYEN, HENRY
item Arelli, Prakash
item SHANNON, GROVER

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/15/2005
Publication Date: 1/15/2006
Citation: Guo, B., Sleper, D.A., Nguyen, H., Arelli, P.R., Shannon, G. 2006. Qtl mapping of resistance to soybean cyst nematode races 1, 2, and 5 in soybean pi 404198a. Crop Science. Vol. 46 p. 224-233.

Interpretive Summary: Soybean cyst nematode (SCN) is a major pest on soybean and annual yield losses are estimated to be over 1 billion dollars for the USA. Use of resistant varieties and rotations of soybean with crops such as corn will minimize yield losses caused by this peat. Most of the currently grown resistant varieties have the major genes in common for SCN resistance and allow the nematode to overcome the resistance within few years. Soybean PI 404198A may provide new genes for resistance to the nematode and DNA markers were used to identify genes for resistance in soybean PI 404198A. Use of these markers tagged to resistance genes will improve methods for developing resistant cultivars. This information helps soybean breeders to develop new varieties faster so soybean producers will have reduced burden caused by nematodes.

Technical Abstract: Soybean cyst nematode (SCN) (Heterodera glycines Ichinohe) is a major pest of soybean [Glycine max (L.) Merr] in the USA. Soybean Plant Introduction (PI) 404198A is one of the newly identified sources that can provide a broad spectrum of resistance to SCN. The objective of this study was to identify quantitative trait loci (QTL) associated with resistance to SCN races 1, 2 and 5 in PI 404198A. Linkage groups (LG) G and A2 were found to be associated with resistance to race 1. QTL on LG G was located on the Satt309-Satt688 region and it explained a larger proportion of the total variation (20.2%). QTL on LG A2 was located on the Satt424-Satt632-Sat-406 region and it accounted for 9% variation. LGs G and B1 were found to be associated with resistance to race 2. QTL on LG G was located on the Satt688-Satt309-Satt163 region and it explained 12.5% of the total variation. Molecular marker Satt453 on LG B1 that was found to be associated with resistance to race 2 has explained 11% of the total variation. LGs G, B1 and N were found to be associated with resistance to race 5. QTL on LG G was located on the Satt688-Satt309-Satt163 region and it explained 6.3% of the total variation. Molecular marker Satt453 on LG B1 has explained 13% of the total variation. Markers Satt584-Sat-280-Satt549 were associated with a QTL on LG N with 9.5% variation. In conclusion, soybean PI 404198A may carry rhg1 on LG G, Rhg4 on LG A2 and additional QTLs are carried on two linkage groups, B1 and N for SCN resistance.