RELATIONS BETWEEN NUTRITIONAL COMPOSITION AND ANATOMICAL PARAMETER INSORGHUM (SORGHUM-BICOLOR L MOENCH)

Nutritional and chemical parameters with significant differences (P=0. 5) among 10 varieties of sorghum and rates observed in them were as fo llow: lipids (2.76 to 3.75%), raw fiber (60.0 to 64.7%) protein(9.01 t o 11.43%), no nitrogen extract 977.65 to 83,07%), starch (60,5 to 64.2 0%), tannin (2.50 to 10.16 mg/g), and total calories (380 to 4000 Kcal ). Ash content with value of 1.17 to 1.91% protein digestibility (23.8 to 38.8%) and ''in situ'' starch (54.4 to 66.6%) were not statistical ly different. When correlation indexes were determined between results of chemical analysis, it was obtained follow positive correlation hav ing significance: carbohydrates with total calories and fat with fiber . The main negative correlations were: fat and fiber with carbohydrate s, fiber with calories, and digestibility ''In vitro'' of protein with tannin. In order to obtain equivalent analytical tests to substitute an anatomic determination for a chemical one, or vice versa and make e asy the selection of varieties for different use, and the adequate pro cess for sorghum grain, were obtained correlations between chemical da ta of this study and compared to anatomic features determined in a pre vious analysis with same samples (I), it was found 19 significant coef ficients from which 8 were positives and 11 negatives. The main correl ations with capacity of analytical substitution were: size of starch g rain of cornea endosperm - starch amount; size of protein body of flou rlike endosperm - digestibility ''in vitro'' and ''in situ'' of protei n; length of cell of flour like endosperm - starch amount; length and broad of aleurona cells - fiber content. The major negative correlatio ns were: size of starch grain of cornea and flourlike endosperm ash; s ize of protein protein body of cornea endosper - starch amount; length and broad of aleurona cells - carbohydrates and total calories.