The accumulation pattern in developing seeds and its relation to fatty acid variation in soybean

Abstract

Sixty soybean cultivars from Japan and the USA formed five maturity groups (IIb‐Vc) based on number of days from sowing to flowering and number of days from flowering to maturity. Highly significant intervarietal differences in fatty acid composition were found in all the maturity groups, especially in IIc. Stearic and oleic acids showed a larger variation than palmitic, linoleic and linolenic acids. Principal component analysis suggested that the total variation of fatty acid composition depended mainly on the desaturation levels from oleic to linoleic acid. Three cultivars exhibiting unique fatty acid composition, together with a standard cultivar, were examined for the contents of the five fatty acids, as well as crude oil at eight seed‐filling stages. For all four cultivars, it was found that crude oil content increased sigmoidally with advancing filling stage, and that the accumulation patterns of palmitic, linoleic and linolenic acids were similar to that of crude oil. However, the accumulation pattern of stearic acid was different from that of crude oil and divided the cultivars into two distinct groups. For oleic acid, only the cultivar ‘Aburamame’ showed a rapid increase in proportion with advancing filling stage, although not differing markedly in accumulated content from the other cultivars. These results indicate that analysing the accumulation patterns of fatty acids could explain the latent genetic variation in fatty acid composition of soybean seeds.

Correlation between Temperature and Oleic Acid Seed Content in Three Segregating Soybean Populations

“…Different time periods have been used to approximate seed filling (Howell and Collins, 1957; Oliva et al, 2006; Schnebly and Fehr, 1993). We preferred the larger interval of R2 to R8 since oleate accumulation patterns differ among soybean lines (Ishikawa et al, 2001).…”

Effect of sulphur supplementation on micronutrients, fatty acids and sulphur use efficiency of soybean seeds

“…Differences in the composition of fatty acid in seed oil can be due to environmental conditions also (Boschin et al, 2007). Fatty acid composition of soybean oil changes considerably with maturity along with seed oil deposition (Graef et al, 1985, Ishikawa et al 2001. Triacylglycerols, palmitic acid, linolenic acid tend to decrease with maturity whereas linoleic acid increases.…”

Composição de ácidos graxos das sementes de três genótipos de Malpighia glabra L

“…Qualitative variation in fatty acid profile of seeds has already been pointed out among cultivars of several species (Velasco et al 1998, Ishikawa et al 2001, Orhan et al 2002. These differences may be related to genetic variability, geographic localization, environmental or cultivated conditions of growth (Silva et al 2001, Abdala et al 2002.…”