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Viability values of fresh and frozen-thawed samples obtained from Red Villafranquina and Quail Castellana roosters, diluted with Lake Ravie 84 without (Control) or supplemented with 10 mmol valine. Different letters (a,b) indicate significant difference between treatments (control or valine) within the same breed (P < 0.001). n = 40 (20 samples per bread). Abbreviations: QC, Quail Castellana; VF, Red Villafranquina.
