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Title: THE EFFECTS OF SCN RESISTANCE QTL AND FLANKING REGIONS ON RESISTANCE AND AGRONOMIC TRAITS

Author
item DIERS, BRIAN - UNIV OF ILLINOIS
item KABELKA, EILEEN - UNIV OF FLORIDA
item KOPISCH-OBUCH, FRED - UNIV OF ILLINOIS
item CARLSON, SHAWN - UNIV OF ILLINOIS
item Arelli, Prakash

Submitted to: Cellular and Molecular Biology of Soybean Biennial Conference
Publication Type: Abstract Only
Publication Acceptance Date: 8/24/2004
Publication Date: 11/2/2004
Citation: Diers, B.W., Kabelka, E., Kopisch-Obuch, F., Carlson, S., Arelli, P.R. 2004. The effects of scn resistance qtl and flanking regions on resistance and agronomic traits. Cellular and Molecular Biology of Soybean Biennial Conference. CD-Rom. www.asa.cssa.sssa.org/anmeet. 2004

Interpretive Summary:

Technical Abstract: There is a need to confirm SCN resistance QTL and to study the regions where they map. We have confirmed two major SCN resistance QTL from G. soja by backcrossing them into the background of a susceptible experimental line. Field tests show that these genes were associated with a positive or neutral effect on yield. To test the effect of the major SCN resistance gene rhg1 and flanking regions, populations of near isogenic lines (NILs) segregating for rhg1 from PI 88788 were developed. In the NIL populations, the resistance allele at rhg1 was associated with greater resistance, less field SCN reproduction, and greater yield under moderate to high SCN pressure than the susceptibility allele. Under low SCN pressure, the rhg1 resistance allele was associated with less yield in some environments.