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ARS Home » Southeast Area » Raleigh, North Carolina » Soybean and Nitrogen Fixation Research » Research » Publications at this Location » Publication #168097
Title: GENETIC VARIABILITY FOR SEED PHYTIC ACID CONCENTRATION IN REPRESENTATIVE SOYBEAN GERMPLASM ADAPTED TO THE SOUTHEASTERN U.S.

Author
item Burton, Joseph
item Israel, Daniel
item Kwanyuen, Prachuab
item Friedrichs, Martin

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2004
Publication Date: 11/20/2004
Citation: Burton, J.W., Israel, D.W., Kwanyuen, P., Friedrichs, M.R. 2004. Genetic variability for seed phytic acid concentration in representative soybean germplasm adapted to the southeastern u.s.. Agronomy Abstracts. CD-ROM. (5885).

Interpretive Summary:

Technical Abstract: Phytic acid (phytate) in soybean meal is a major source of P in animal excreta, a serious environmental pollutant. A genetic mutant in which seed phytate is reduced by 70% has been developed. The objectives of this study were (1) to determine the natural variation in seed phytate P and phosphate P concs.in breeding lines and cultivars in MG's V, VI, and VII and (2) to evaluate relationships among phytate P, phosphate P, and seed protein concs. Three sets of cultivars and breeding lines were tested separately in three environments. Variation among lines in the three sets was highly significant, ranging from 4.0 to 5.4 mg g-1 phytate P and from 0.18 to 0.37 mg g-1 phosphate P. Genotype x environment interactions were significant for phosphate P conc. but not phytate conc. Rank correlation coefficients between locations were large (0.65 to 0.88) suggesting that the genotype x environment interaction was due to differences in magnitude of phosphate P concs.in the various environments. Correlation coefficients between phytate P and phosphate P concs.were 0.16, 0.47, and 0.63 in the three sets of materials. Variation in seed protein conc. was highly significant in all three sets but were not correlated with phytate P or phosphate P. Consideration of the phytate level of potential adapted parents may be useful in designing a breeding program for low phytate soybeans.