Modifying Genes for Palmitate and Stearate Concentration Impacts Selection for Low‐Phytate, Low‐Saturate Soybean Lines

Brace, Ryan C.; Fehr, W. R.

doi:10.2135/cropsci2011.08.0419

Cited by 2 publications

(4 citation statements)

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“…The mean palmitic and stearic acid content of the LP lines (187.3 g kg −1 ) was significantly greater than the mean of cultivars of 5002T and Osage (172.85 g kg −1 ). Data from our study indicate that none of the LP lines or cultivars evaluated in this study would meet the low saturate standard, agreeing with previous reports that LP lines tend to have higher saturate concentrations than non‐LP lines (Brace and Fehr, 2012).…”

Section: Discussionsupporting

confidence: 92%

Seed Inorganic Phosphorus Stability and Agronomic Performance of Two Low‐Phytate Soybean Lines Evaluated across Six Southeastern US Environments

et al. 2017

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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.

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Section: Discussionsupporting

confidence: 92%

Seed Inorganic Phosphorus Stability and Agronomic Performance of Two Low‐Phytate Soybean Lines Evaluated across Six Southeastern US Environments

et al. 2017

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“…First, the genetics of the lpa trait is still in its infancy, as compared with other seed chemistry traits like starch, protein or oil content or chemistry. In addition to the relatively few major lpa loci that have been identified to date, to my knowledge there has been only two studies to date documenting secondary loci or allelic variants of genes that have a valuable modifier effect in an lpa background (discussed below, [91,92]). Such modifiers are well known for genes that perturb or alter starch, protein and oil content and chemistry, and critically important to breeding elite-performance lines with such traits [93][94][95].…”

Section: The Low-mentioning

confidence: 99%

“…The U.S. Food and Drug Administration set an upper threshold of 89 g saturated fats per kg product in order to refer to a product as "low saturated fat" [96]. A breeding program targeted developing low-phyate/low saturated fat soybean cultivars [92,97]. The low-phytate donor line was the original low-phytate soybean mutant CX1834 [85], and its seed had a relatively high saturated fatty acid (palmitate + stearate) concentration ranging from~100 to 174 g per kg seed [97].…”

Section: The Low-mentioning

confidence: 99%

“…How this group's work illustrates the value of a sustained effort and identification of beneficial modifier alleles is that following further crossing and selection, low-phyate soybean lines with saturated fatty acid levels less than 70 g per kg seed were successfully identified. It was concluded that this was accomplished via selection for "favorable modifying genes for low saturate concentration" [92].…”

Section: The Low-mentioning

confidence: 99%

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Low phytic acid Crops: Observations Based on Four Decades of Research

Raboy¹

2020

Plants

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The low phytic acid (lpa), or “low-phytate” seed trait can provide numerous potential benefits to the nutritional quality of foods and feeds and to the sustainability of agricultural production. Major benefits include enhanced phosphorus (P) management contributing to enhanced sustainability in non-ruminant (poultry, swine, and fish) production; reduced environmental impact due to reduced waste P in non-ruminant production; enhanced “global” bioavailability of minerals (iron, zinc, calcium, magnesium) for both humans and non-ruminant animals; enhancement of animal health, productivity and the quality of animal products; development of “low seed total P” crops which also can enhance management of P in agricultural production and contribute to its sustainability. Evaluations of this trait by industry and by advocates of biofortification via breeding for enhanced mineral density have been too short term and too narrowly focused. Arguments against breeding for the low-phytate trait overstate the negatives such as potentially reduced yields and field performance or possible reductions in phytic acid’s health benefits. Progress in breeding or genetically-engineering high-yielding stress-tolerant low-phytate crops continues. Perhaps due to the potential benefits of the low-phytate trait, the challenge of developing high-yielding, stress-tolerant low-phytate crops has become something of a holy grail for crop genetic engineering. While there are widely available and efficacious alternative approaches to deal with the problems posed by seed-derived dietary phytic acid, such as use of the enzyme phytase as a feed additive, or biofortification breeding, if there were an interest in developing low-phytate crops with good field performance and good seed quality, it could be accomplished given adequate time and support. Even with a moderate reduction in yield, in light of the numerous benefits of low-phytate types as human foods or animal feeds, should one not grow a nutritionally-enhanced crop variant that perhaps has 5% to 10% less yield than a standard variant but one that is substantially more nutritious? Such crops would be a benefit to human nutrition especially in populations at risk for iron and zinc deficiency, and a benefit to the sustainability of agricultural production.

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Modifying Genes for Palmitate and Stearate Concentration Impacts Selection for Low‐Phytate, Low‐Saturate Soybean Lines

Cited by 2 publications

References 19 publications

Seed Inorganic Phosphorus Stability and Agronomic Performance of Two Low‐Phytate Soybean Lines Evaluated across Six Southeastern US Environments

Seed Inorganic Phosphorus Stability and Agronomic Performance of Two Low‐Phytate Soybean Lines Evaluated across Six Southeastern US Environments

Low phytic acid Crops: Observations Based on Four Decades of Research

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