[Father-male offspring transmission of seasonal variations in testicular diameter and percentage of abnormal sperm in the Ile-de-France ram. 1. Male offspring born in February].

Abstract excerpt

An experiment was conducted on the Ile-de-France (IF) breed to determine if the more or less important sensitivity of the ram to photoperiodism came under genetic control. Five base breed unrelated rams (greater than or equal to 4 yr old), were chosen for this study: 2 good (I and II), 2 bad (III and IV), and an intermediate sire (V). Ram I, which died a few years before the experiment began, was selected on both...

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