COMPARATIVE STUDY ON THE PHYSICOCHEMICAL CHARACTERISTICS OF SOYBEAN (Glycinemax) GENOTYPE

Abstract

A comparative study was conducted to find out the physico-chemical characteristics of five different soybean varieties collected from various sources. In this study, seed weight, moisture%, ash%, oil%, protein%, carbohydrate, chemical constant (saponification, acid, and iodine value), fatty acid composition and mineral composition of five soybean genotypes and their cakes were estimated. Among the five varieties the highest thousand seed weight was 159.00±1.0g found in BINA Soybean-2. Moisture content varied from 9.29±0.12% (Shohag) to 10.49±0.28% (BINA Soybean-2). Maximum ash content was observed in Shohag (5.18±0.12%). Oil content varied from 12.67±1.15% (BARI Soybean-5) to 16.73±0.64% (BINA Soybean-1). Maximum oil cake was found in BARI Soybean-5 (87.33±1.15%). Protein percentage ranged from 37.99±0.36% (BARI Soybean-6) to 41.50±0.18% (BINA Soybean-1). Carbohydrate content was ranged from 27.19±0.45% (BINA Soybean-1) to 34.72±0.58% (BARI Soybean-6). Highest iodine value was observed in BNIA Soybean-1 (95.69±0.10). Highest saponification value was found in BINA Soybean-1 (191.79±0.21). Lowest acid value was found in BINA Soybean-1 (0.91±0.01). BINA Soybean-1 content highest amount of oleic acid (24.72±0.03%), linoleic acid (35.63±0.03%) and linolenic acid (9.24±0.03%). In terms of mineral composition, the variety Shohag showed highest amount of phosphorus (0.82±0.82%), potassium (0.80±0.04%), manganese (32.03±0.06 ppm), cupper (29.00 ppm) and zinc (54.70 ppm). This study suggests that Shohag contained notable mineral compositions but in the matter of qualitative aspect BINA Soybean-1 performed better over other varieties.