Evaluation of soybean cultivam for isoflavone contents

Abstract

Isoflavone contents of 100 soybean (Glycine max (L.) Merrili) cultivars frorn the germplasrn bank of the Centro Nacional de Pesquisa de Soja (CNPSo/EMBRAPA), sown in the 1993-94 season, were determined by high performance liquid cromatography (HPLC). Cultivars FT-Canarana, UFV-9, BABR-31 and FT-13 showed low contents of isofiavones (16.78; 22.26; 25.56; and 29.58 mg/100 g, respectively), while EMBRAPA-20 had the highest level (172.94 mg/100 g). High temperatures (2t 24'C in average) during seed developinent, decreased the amount of isoflavones. Soybean cultivars sown in Porangatu, GO (13' S latitude) had lower levels of isofiavones compared to the same cultivars; sown in Londrina, PR, (23º 12' S latitude) probably due to differences in temperature between the two places.