PROXIMATE AND MINERAL COMPOSITION OF SELECTED SOYBEAN GENOTYPES IN NIGERIA

Abstract

An experiment was conducted at the Central Services Laboratory of the National Cereals Research Institute, Badeggi, Nigeria to evaluate proximate and mineral composition of eight soybean accessions (NG/MR/11/11/060, NG/SA/07/100, NG/SA/JAN/09/48, NGB00111, NGB00113, NGB00116, NGB01318) conserved in the National Genebank at National Centre for Genetic Resources and Biotechnology [NACGRAB), Ibadan, Nigeria and twelve varieties (TGX1019-2EB, TGX1019-2EN, TGX1440-1E, TGX1448-2E, TGX1485-1D, TGX1835-10E, TGX1904-6F, TGX1951-3F, TGX198762F, TGX1989-19F, TGX923-2E, TGX1987-10F) developed at National Cereals Research (NCRI) in collaboration with International Institute for Tropical Agriculture (IITA) and the result showed wide significant variations in the proximate and mineral contents. TGX1987-62F recorded the highest dry matter content of 98.34% while TGX 923-2E gave the highest moisture content (6.12%). Highest values for Crude ash (5.02%) and crude fibre (6.12%) were recorded for TGX1951-3F. NGB00116 had the significantly highest protein content of 41.92% and an appreciable oil content of 27.65%. Protein content was also high for TGX1987-10F (41.33%) and NG/MR/11/11/060 (41.31%). TGX1989-19F had the highest oil content of 30.45% and energy value (496.37Kcal/g). NGB00113 had the highest carbohydrate content of 52.74%. K. Na, Ca, Mg and P were highest in NG/SA/JAN/09/48 (1.99%), NGB00116 (0.57%), TGX1485-1D (1.60%) TGX1951-3F (0.84%) and NGB00113 (0.85%) respectively. The study provides valuable information on soybean genotypes with very high protein and oil content for recommendation to farmers and other end users and for breeders to select and utilize in soybean quality improvement programmes.