Failure of Cockerel Comb and Testis Development on Sesame Meal and its Prevention by Vitamin B12.

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Abstract
Feeding single comb White Leghorn cockerels, depleted of vit. B12 during the first 2 wks. of life (sodium proteinate basal diet plus 0.05% iodinated casein), from the 2d to the 4th week of age on a 70% sesame meal diet deficient in vit. B12 and lysine resulted in failure of morphological differentiation of testicular tissue and a decrease of comb growth. Supplementation with lysine had little corrective effect but added vit. B12 (APF supplement Merck No.3) and lysine produced markedly greater testis growth and differentiation over that in the controls.

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