Environmental and genetic variation of isoflavone content of soybean seeds grown in Brazil

Abstract

-The objective of this work was to evaluate isoflavone concentrations in seeds of different Brazilian soybean cultivars grown in a range of locations and environmental conditions in Brazil. Seeds of 233 cultivars grown in Ponta Grossa, PR, Brazil, during the 2001/2002 soybean season, and of 22 cultivars sown in different locations of Brazilian Northeast, Southeast on South regions were analyzed for total isoflavones, including daidzin, glycitin, genistin and acetylgenistin. The total isoflavones ranged from 12 mg 100 g -1 (cv. Embrapa 48) to 461 mg 100 g -1 (cv. CS 305) among the 233 cultivars grown in Ponta Grossa, and the differences among them are due to genetic effects since all cultivars were grown and collected at the same locatation and year. This is an indication of the possibility of breeding for isoflavone content. Differences in isoflavone content observed in the cultivars grown in different locations permit the selection of locations for optimum isoflavone content (low or high), depending on the uses of soybean. In the Northeast region (5-8°S), higher concentrations of total isoflavones were observed at São Raimundo das Mangabeiras (232 mg 100 g -1 ) and Tasso Fragoso (284 mg 100 g -1 ) municipalities, and in the South (23-30°S), isoflavones were higher in Guarapuava, Canoinhas, Vacaria and Campos Novos municipalities, ranging from 130 to 409 mg 100 g -1 .

Chemical composition of tempeh from soybean cultivars specially developed for human consumption

“…Carrão-Panizzi and Bordignon (2000) reported that soybean cultivars show a significant genetic variability for β-glucosidase activity. Genetic differences and environmental effects for isoflavone contents in Brazilian soybean cultivars were also investigated by Carrão-Panizzi et al 2009b. Their results suggest that the choice of cultivars with better chemical composition will allow processing of high quality soy foods for human consumption.…”

“…Isoflavones are also highly influenced by genetic variability and environmental conditions (CARRÃO-PANIZZI et al, 2009b).…”

Soybean genotype analysis for cyst nematode resistance

“…The authors reported that some plant introductions that led to this genotype showed bite resistance in insect feeding. It was subsequently confirmed resistance of IAC100 in naturally occurring infestations of soybean bug complex (Piozodorus guildinii, Euschistus spp, and Nezara viridula (Rosseto, 1989;Carro-Panizzi and Kitamura, 1995). This cultivar has two American introductions PI 229358 and PI 274454 in its genealogy (Carro-Panizzi and Kitamura, 1995), which have proven resistance to complex gift bedbugs in South America (Panizzi et al, 2000) and southern United States (Mcpherson and Mcpherson, 2000).…”

Brotos de linhagens genéticas de soja: avaliação das propriedades físico-químicas

“…O teor de isoflavonas nas sementes de soja pode diferir de acordo com a cultivar, a época de plantio, as condições climáticas e do solo, o local de cultivo e a incidência de estresses bióticos no local de plantio (BERGER et al, 2008). Carrão-Panizzi et al (2009a) Neste trabalho, cujas observações não consideraram partes dos brotos, observou-se que a forma aglicona teve sua concentração aumentada nos brotos em decorrência do processo germinativo das sementes (Tabela 4).…”