4 (2) 2020, APRIL 2020
Pages: 94-102
Varietal differences based on proximate, minerals and anti-nutritive composition in African walnut (Tetracarpidium conophorum Mull)
Author: Nwakuche Chinenye Onwubiko, Queen Ifeoma Emereole
Category: Evoluation
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Abstract:
A research on proximate, minerals and anti-nutritive composition of African walnut collected from Nigeria and Cameroon was carried out at the Laboratory of Department of Biochemistry and Technology, Federal University of Technology, Owerri, Nigeria. Experimental design was completely randomized design with five replications. Proximate properties of the two lines did not show any significant difference (P< 0.05) except for carbohydrate. However, the line from Nigeria had higher values in protein (28.32%), crude fat (5.67%), ash (4.33%), and moisture (38,44%) content, while higher values for carbohydrate (20.87%) and crude fibre (9.32%) was obtained for the line from Cameroon. The mineral composition of the two lines showed significant difference (P> 0.05) in some mineral elements like manganese, sodium and chromium. Anti-nutritional composition of the two lines did not show any significant difference like the result on proximate analysis. However, higher values of phytate (6.27%), and oxalate (0.11%) was observed for the line from Nigeria while the line from Cameroon had higher content of tannin (0.36%) and saponin (0.27%). Apparently, the few significant differences observed between the two lines is not adequate to establish varietal difference. Further no single variety had higher values in all the evaluated biochemical (proximate, mineral and anti-nutritive) components, implying that the two lines are similar.
Keywords: African walnut, biochemical composition, properties, varietal differences
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