|SPECHT, J. - UNIVERSITY OF NEBRASKA
Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/1999
Publication Date: N/A
Technical Abstract: Genetic improvement in crop yield requires routine discovery of the elite x elite matings that are capable of producing transgressive segregants. Marker-based identification of quantitative trait loci (QTLs) is a sub-genomic, locus-based means of detection. To represent an elite x elite mating, the soybean cultivars 'Harosoy' and 'Clark' were mated, the F1 selfed, and F2 single-seed-descended to 300 F5.6 Recombinant Inbred Lines (RILs). The parents and RILs were polymorphic for about 225 SSR markers spaced across the soybean genome. Parents, RILs, and checks were evaluated for yield and other traits in irrigated and rainfed field trials (2-rep RCBs) conducted in 1998, 1999, and 2000. We intend to trace the high- and low- yield parental alleles of any discovered QTLs back to the parents of Harosoy and Clark, which represent four of the ten major anscestors that contributed favorable alleles to the USA elite germplasm pool.