<p>Males from wild type <i>Canton S</i> (A-B), <i>milkah-1</i> (C–D), <i>ss<sup>a40a</sup></i> (E–F) and <i>ss<sup>a40a</sup>milkah-1</i> (G–H) lines were tested. (A, C, E, G) – of tested males. (B, D, F, H) – of tested males. On the X-axis: time following training, in days; on the Y axis: – courtship index, – learning index, standard units. Open columns – of naive males, hatched columns – () of trained males. Each point represents 20 males. ** - or significantly lower than for wild type (two-sided randomization test, ) in similar condition; - in a test immediately following training or in a deferred test, significantly lower than the CI of naive males (two-sided randomization test, ); - in the delayed test significantly lower than in test immediately following training (two-sided randomization test,.</p
