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- Title
Seed Inorganic Phosphorus Stability and Agronomic Performance of Two Low-Phytate Soybean Lines Evaluated across Six Southeastern US Environments.
- Authors
Boehm Jr., Jeffrey D.; Walker, Forbes R.; Bhandari, Hem S.; Kopsell, Dean; Pantalone, Vincent R.
- Abstract
Nondigestible phytate salts that chelate nutritional minerals in the digestive tract of monogastric animals are an unwanted component of soymeal [Glycine max (L.) Merr.] and a documented source of nonpoint phosphorus (P) pollution in the waste stream detrimental to the environment. Lowering soybean phytate levels would ease environmental concerns and improve soymeal mineral bioavailability. In 2013, a field trial consisting of two University of Tennessee low-phytate (LP) lines (56CX-1273 and 56CX-1283) and two high-yielding check cultivars ('5002T' and 'Osage') were planted in four row plots in two replications at six Southeastern locations in a randomized complete block design to evaluate the LP lines for agronomic performance, seed quality traits and inorganic P (Pi) stability. Results revealed that there were no significant differences (P > 0.05) for mean seed yield or field emergence (germination) between the two LP lines and the two cultivars. Although the genotype × environmental index linear regression of seed Pi for the two LP lines revealed a slope that was significantly different (P < 0.001) from zero, and therefore not stable across the six environments, the mean Pi concentrations for LP lines 56CX-1273 (2084.7 μg g-1) and 56CX-1283 (1744.4 μg g-1) were still about an order of magnitude greater than the means of Osage (185.7 μg g-1) and 5002T (228.0 μg g-1). This study documents that a LP line can produce seed yields statistically equivalent to high-yielding check cultivars with no germination issues.
- Subjects
CROP genetics; SOYBEAN; EFFECT of phosphorus on plants; PHYTIC acid
- Publication
Crop Science, 2017, Vol 57, Issue 5, p2555
- ISSN
0011-183X
- Publication type
Article
- DOI
10.2135/cropsci2017.02.0107