An RIL population from a Shinpaldalkong2/GC83006 cross was employed to identify quantitative traitloci (QTL) associated with agronomic traits in soybean.The genetic map consisted of 127 loci which covered about3,000cM and were assigned into 20 linkage groups. Phe-notypic data were collected for the following traits; plantheight, leaf area, flowering time, pubescence color, seed coatcolor and hilum color in 2005. Sed weight was evaluatedusing seeds collected in 2003 to 2005 at Suwon and in2005 at Pyeongchang and Miryang sites. Three QTLs wereassociated with 100-seed weight in the combined analysisacross three years. Among the three QTLs related to seedweight, all GC83006 alleles on LG O (R² =12.5),LGA1(R²= 10.1) and LG C2 (R² = 11.5) increased the seed weight.A QTL conditioning plant height was linked to markersincluding Satt134 (LG C2,R² = 25.4), and the GC83006allele increased plant height at this QTL locus. For twoQTLs related to leaf area,laM on LG M (R²= 10.0) andlaL on LG L (R² = 8.6), the Shinpaldalkong2 alleles hadpositive ffect to increase the leaf area. Satt134 on LG C2(R²= 41.0) was associated with QTL for days to flowering.Satt134 (LG C2) showed a linkage to a gene for pube-scence color. Satt363 (LG C2) and Satt354 (LG I) werelinked to the hilum color gene, and Sat077 (LG D1a) waslinked to the seed coat color. The QTL conditioning plantheight was in the similar genomic location as the QTLs fordays to flowering in this population, indicating pleiotropiceffect of one gene or the tight linkage of several genes.These linked markers would be useful in marker assistedselection for these traits in a soybean breeding program.
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