Seeding date, row spacing, and weed effects on soybean isoflavone concentrations and other seed characteristics

Al-Tawaha, Abdel Rahman Mohammad Said; Séguin, Philippe

doi:10.4141/p06-043

Cited by 33 publications

(30 citation statements)

References 39 publications

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“…Although the environment and G )E interaction were reported as significant factors for isoflavone content, the means comparison found that differences in isoflavone content were significant between the classes. The findings that isoflavone content and protein content are negatively correlated are consistent with the results of other studies (Chiari et al 2004;Seguin et al 2004;Primomo et al 2005;Al-Tawaha and Seguin 2006). Although the relationship between isoflavone and protein was negative, genotypes were identified, such as entry 8 in Group A and entries 13 and 15 in Group B that had high isoflavone content (approximately 3500 mg g (1 ) and moderate protein levels (42%).…”

Section: Resultssupporting

confidence: 81%

“…Positive associations (Primomo et al 2005;Seguin et al 2004;Wang et al 2000;Yin and Vyn 2005), negative associations (AlTawaha and Seguin 2006) and no associations (Charron et al 2005) have been reported between total isoflavone concentration and seed yield. Wang et al (2000) observed differences in total isoflavone concentration among maturity groups; however, a significant correlation between total isoflavone content and days to maturity was not found.…”

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confidence: 99%

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Association of seed and agronomic traits with isoflavone levels in soybean

Murphy¹,

Lee²,

Woodrow³

et al. 2009

Can. J. Plant Sci.

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. 2009. Association of seed and agronomic traits with isoflavone levels in soybean. Can. J. Plant Sci. 89: 477Á484. Soybean, Glycine max (L.) Merr., seeds contain isoflavones, compounds with potential human health benefits. This study investigated the association of seed and agronomic traits with isoflavone level in a genetically diverse group of soybean genotypes to provide more information for cultivar development. F 4:7 lines derived from several crosses were grown in four locations in 2005 and six locations in 2006 across Ontario and Quebec. Seed protein, oil and isoflavone contents were measured using near-infrared reflectance (NIR) on a plot basis. Seed yield was determined at 13% moisture and days to maturity (R8) were recorded. GGE genotype-bytrait biplots were generated to describe the relationships among all variables. Isoflavone content was not correlated with yield, indicating that potential exists for development of high or low isoflavone cultivars without sacrificing yield. Isoflavone content was negatively correlated with protein content, however high isoflavone lines were identified with moderate protein content. Isoflavone content was correlated with maturity suggesting that delayed planting and/or the use of later maturing varieties could be a successful strategy to increase isoflavone content. The results of this study support the potential for the development of either high or low isoflavone soybean cultivars with acceptable agronomic and seed quality traits.Key words: Soybean, isoflavone, protein, oil, yield, maturity Murphy, S. E., Lee, E. A., Woodrow, L., Seguin, P., Kumar, J., Rajcan, I. et Ablett, G. R. 2009. Relation des caracte`res grainiers et agronomiques avec la concentration d'isoflavones chez le soja. Can. J. Plant Sci. 89: 477Á484. Les graines du soja, Glycine max (L.) Merr., contiennent des isoflavones, compose´susceptible d'avoir des effets be´ne´fiques sur la sante´. L'e´tude examinait les liens qui existent entre la concentration d'isoflavones et les caracte`res grainiers et agronomiques dans un groupe de varie´te´s de soja ge´ne´tiquement varie´, dans le but de fournir plus d'informations en vue de cre´er de nouveaux cultivars. Les ligne´es F 4:7 issues de plusieurs croisements ont e´te´cultive´es a`quatre endroits en Ontario et au Que´bec, en 2005, et a`six, en 2006. La teneur en prote´ines, en huile et en isoflavones des graines a e´te´e´tablie par re´flectance dans le proche infrarouge, dans les parcelles. Le rendement grainier a e´te´mesure´a`13 % de teneur en eau et on a enregistre´le nombre de jours jusqu'a`maturite´(R8). L'analyse GGE par double projection du ge´notype et des caracte`res a permis de de´crire les liens entre les variables. La concentration d'isoflavones n'est pas corre´le´e au rendement, signe qu'on pourrait cre´er des cultivars a`faible ou a`forte concentration d'isoflavones sans que le rendement en souffre. La concentration d'isoflavones pre´sente une corre´lation ne´gative avec la teneur en prote´ines, mais les ligne´es produisant beaucoup d'isoflav...

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Section: Resultssupporting

confidence: 81%

mentioning

confidence: 99%

Association of seed and agronomic traits with isoflavone levels in soybean

Murphy¹,

Lee²,

Woodrow³

et al. 2009

Can. J. Plant Sci.

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“…2004, Al‐Tawaha et al. 2006, Al‐Tawaha and Seguin 2006). Of all these factors, irrigation has resulted in some of the greatest isoflavone concentration increases reported in field studies.…”

Section: Introductionmentioning

confidence: 99%

Irrigation Level Affects Isoflavone Concentrations of Early Maturing Soya Bean Cultivars

Al-Tawaha¹,

Séguin

Smith³

et al. 2007

J Agronomy Crop Science

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Field experiments were conducted in 2003/2004 in Que´bec to determine the effects of irrigation levels (none, low and high) and cultivars (AC Orford, AC Proteina and Golden) on soya bean [Glycine max (L.) Merr.] isoflavone concentrations and yields. Seed yield, yield components, and oil and crude protein (CP) concentrations were concurrently determined. Response to irrigation was greater in 2003, which was substantially warmer and drier than in 2004. In both years, most responses were observed with the lower of the two irrigation levels evaluated, which increased total isoflavones concentration by an average of 45 % compared with a non-irrigated control. Cultivars, however, responded differently to irrigation. In 2003, response of AC Proteina was greater than that of AC Orford, while Golden did not respond. In 2004, some responses were observed with AC Proteina and Golden but none with AC Orford. Overall, in both years, AC Proteina had the greatest isoflavone concentrations and AC Orford the lowest. Responses of seed yield and yield components depended on the year and were also greater in 2003. Both irrigation treatments generally increased seed yield and yield components compared with a non-irrigated control; the response was greater with the higher irrigation level. Irrigation had no effect on oil and CP concentrations. Finally, isoflavone yield response to irrigation was again greater in 2003, and depended on the cultivar. Results thus demonstrate that specific soil moisture levels will maximize soya bean isoflavone concentrations, excess irrigation sometimes negating any potential benefits.

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“…These effects have been attributed to a large extent to the phytochemicals called isoflavones, which occur naturally in soybean seeds and soy products. Recent studies have uncovered substantial differences in isoflavone levels among Canadian soybean varieties (Primomo et al 2005a;Al-Tawaha and Seguin 2006).…”

Section: Increasing Nutraceuticals In Seedmentioning

confidence: 99%