| Title: | Genomic Regions Governing Soybean Seed Nitrogen Accumulation |
| Authors: | Panthee, D.R., Pantalone, V.R., Sams, C.E., Saxton, A.M., West, D.R., Rayford, W.E. |
| Source: | J. Amer. Oil Chem. Soc. 2004, 81(1):77-81 |
| Abstract: | Nitrogen accumulation in the form of seed protein takes place in soyabean [Glycine max (L.) Merr.] during the reproductive stages of development. The purpose of this study was to relate genotypic differences in seed nitrogen accumulation with genomic regions controlling nitrogen accumulation in soyabean during R5, R6, and R7 growth stages. A population of 101 F6:8 recombinant inbred lines (RIL) developed from a cross of N87-984-16 x TN93-99 was utilized. The RIL were grown at the University of Tennessee, Knoxville Experiment Station, in a randomized complete block design with three replications in 2002. Seed nitrogen was determined from pod samples harvested at the R5, R6, and R7 growth stages. A significant (P<0.05) difference among genotypes was found for nitrogen accumulation at all three growth stages. Single-factor ANOVA revealed that quantitative trait loci (QTL) governing nitrogen accumulation in soyabean seed were distributed in the linkage groups A2, B2, D1a, D1b, E, G, and M. Phenotypic variation explained by an individual QTL ranged from 5 to 11.6%. These QTL may provide useful marker-assisted selection opportunities for soyabean protein improvement. |