2008 Joint Annual Meeting (5-9 Oct. 2008): Validation of Quantitative Trait Loci Associated with Seed Size, Protein and Sucrose Content in Soybean (Glycine max).
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636-14 Validation of Quantitative Trait Loci Associated with Seed Size, Protein and Sucrose Content in Soybean (Glycine max).



Tuesday, 7 October 2008
George R. Brown Convention Center, Exhibit Hall E
Luciano Jaureguy, Pengyin Chen and Andrew Scaboo, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Plant Science Building Room 115, Fayetteville, AR 72701
High seed protein and sucrose content as well as suitable seed size are currently the main food-grade soybean breeding targets. Identification and utilization of molecular markers linked to these traits can help understand the genetic basis of seed quality traits and their response in different environments, and consequently facilitate food-grade soybean breeding selection. A set of F 4:6 98 recombinant inbred lines (RIL) derived from a cross between a high protein breeding line R95-1705 and a large seeded cultivar MFL-552 with high sucrose content, were used to confirm previously published Quantitative Trait Loci (QTL) for the three traits. The F 4:6 RIL population was grown in Fayetteville and Stuttgart, AR in 2007. Seed sucrose content was determined by High Performance Liquid Chromatography and seed protein was obtained using a Near Infrared (NIR) analyzer. Seed size (range 13.07-22.5 g/100 seeds; mean 17.6 g/100 seeds), protein content (range 42-52 %, mean 47.2 %) and sucrose content (range 1.08-5.92 %, mean 3.6 %) exhibited a normal distribution. Parental genotypes were screened with 77 SSR markers, previously reported to be linked to QTL for seed size, seed sucrose or seed protein. Thirty-five markers were polymorphic between parents. Progeny lines have been screened with these polymorphic markers. Single marker QTL analysis data will be presented.
See more of: Genetic Improvement of Soybean, Common Bean, and Peanut for Quality and Disease Resistance (includes Graduate Student Competition) (Posters)
See more of: C01 Crop Breeding & Genetics