%0 Journal Article %T Improving the Bioavailability of Seed Phosphorous in Low Phytic Acid Soybean Mutants %A Ashok Badigannavar and J. G. Manjaya %J Electronic Journal of Plant Breeding %D 2012 %I Indian Society of Plant Breeders %X Phytic acid, the heat stable anti-nutritional factor forms 75% of the total Phosphorous (P) in soybean seeds. It acts as strong chelatingagent binding to metal ions reducing the bioavailability of Fe, Zn, Mg and Ca in human and non-ruminant livestock. In the presentstudy, 106 soybean germplasm lines were screened to estimate the seed phytate. It ranged from 0.16 to 4.741mg per g soy flour. Highyielding, low phytate cultivar were selected and subjected to 250 Gy gamma ray irradiation. In M3 generation, mutants having phyticacid content ranged from 0.075 to 2.58 mg/g of soy flour were identified. These mutants have shown as much as 50% or morereduction in seed phytate compared to control. Although low phytic acid line had much higher inorganic ¡®P¡¯ concentrations than seedof the normal lines, the balance between protein and oil content was not altered. Since, corn-soy and soymeal are commonly fed tolivestock; reducing phytate content would contribute to increased bioavailability of ¡®P¡¯ in these livestock feeds. %K Soybean %K Gamma rays %K Phytic acid %K Inorganic P %K seed oil %K protein %U https://sites.google.com/site/ejpb2011/vol-3-1/Vol-3-1-643-648.pdf?attredirects=0