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Isolation of High Seed Inorganic P, Low‐Phytate Soybean Mutants
Author(s) -
Wilcox James R.,
Premachandra Gnanasiri S.,
Young Kevin A.,
Raboy Victor
Publication year - 2000
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2000.4061601x
Subject(s) - phytic acid , biology , ethyl methanesulfonate , glycine , soybean meal , cultivar , agronomy , food science , horticulture , mutant , biochemistry , amino acid , gene , raw material , ecology
Phosphorous in soybean [ Glycine max (L.) Merr.] seed is stored primarily as phytic acid, which is nutritionally unavailable to nonruminant livestock. The objective of this study was to isolate mutations that reduce soybean seed phytic acid P and increase seed inorganic P. Following treatment with ethyl methanesulfonate, M2 through M6 plants were screened for high seed inorganic P. Seeds of M2 plants high in inorganic P produced progenies high in inorganic P through the M6 generation. M6 progenies of one plant averaged 6.84 g kg −1 seed phytic acid and inorganic P varied from 2.34 to 4.41 g kg −1 or 60 to 66% of phytic acid P plus inorganic P. M6 progenies of a second plant averaged 10.89 g kg −1 phytic acid and varied from 1.21 to 3.84 g kg −1 inorganic P, representing from 47 to 51% of the sum of phytic acid P plus inorganic P. In contrast, nonmutant seeds of the check cultivar Athow contained 15.33 g kg −1 phytic acid and averaged 0.74 g kg −1 inorganic P, representing 15% of the sum of phytic acid P plus inorganic P. Low phytic acid and high inorganic P in these progenies should increase the nutritional value of soy meal and reduce excess P in livestock manure.