Accumulation of phytate in vegetable-type soybean genotypes harvested at four developmental stages

Abstract

A total of 17 vegetable-type soybean (Glycine max [L.] Merr) genotypes were planted in four-row plots arranged in a randomized complete block design in 1988 and 1989 at Petersburg, Virginia. Each genotype was harvested at four developmental stages and evaluated for phytate content. Highly significant differences for phytate content were observed among the stages of harvest and genotypes, and there was an interaction between genotype x stage of harvest. The significant differences observed for phytate content among genotypes indicated that genetic variation exists among the tested genotypes for selection and improvement through hybridization. Among the genotypes, 'Kingston' and PI 423852 had the highest phytate content in most stages of harvest while PI 416771, 'Emperor', and PI 416982 had the lowest phytate values. A heritability estimate of 81 percent was observed for phytate content. This high heritability value indicates that selecting genotypes for lower phytate content would be effective. Significant correlations were observed for phytate content among genotypes harvested at R6, R7, R8, and overall. The magnitude of association of R6 with the overall phytate mean was especially high. These results illustrate that determining the phytate content of genotypes at the R6 growth stage would be a good predictor of the overall genotypic performance.

Fresh Green Seed Yield and Seed Nutritional Traits of Vegetable Soybean Genotypes

“…Phyic acid content of certain cereals and legumes has been reported to vary between 1.4 and 20.5 g kg −1 (Reddy et al, 1982). The phytate content of the genotypes studied here were considerably lower than those reported for several vegetable soybean genotypes harvested at R6 stage in Virginia (Mebrahtu et al, 1997).…”

“…The PI 181565 had significantly greater number of seeds per pod than Tomahomare, Guanyun Da Hei Dun, and Tambagura but was similar to the rest. A similar number of seeds per pod was reported for several vegetable soybean genotypes grown in Virginia (Mebrahtu et al, 1997) and Washington (Konovsky et al, 1996). The number of seeds per pod and seed weight are generally negatively related as they compete for the same resources.…”

“…Phytate, calcium–magnesium–potassium salt of inositol hexaphosphoric acid, commonly known as phytic acid occurs in certain cereal and legume seeds (Reddy et al, 1982), including soybean (Mebrahtu et al, 1997). Phytate is the main source of phosphorus in soybean seed and is known to form complexes with phosphorus, proteins, and minerals such as Ca, Mg, Zn, and Fe (Reddy et al, 1982).…”

Inheritance of seed phytate in mungbean (Vigna radiata (L.) Wilczek)

“…Heritability of PA in seeds of normal vegetable soybean was reported to be 81% (Mebrahtu et al 1997). Their experiment confirmed that environment plays less of a role than genotype in conditioning PA and that only a few genes may be involved in the genetic control of PA.…”

Textural and Microbiological Qualities of Vegetable Soybean (Edamame) Affected by Blanching and Storage Conditions

“…Additionally, edamame is nutritious, rich in vitamins, calcium, dietary fiber, protein, and isoflavones [7,8] and offers numerous health benefits, including stronger bones and teeth, lower cholesterol levels, prevention of cardiovascular disease, and reduction in mammary and prostrate cancers [9]. Numerous and extensive efforts have been made to develop cultivars suitable for successful cultivation in Southside Virginia [10][11][12][13][14]. Currently, three varieties developed at Virginia State University for local growing conditions, namely Asmara, Randolph, and Owens that have been registered by the United States Department of Agriculture [15][16][17].…”