“…It has also been shown that the architecture of the hippocampus (i.e., mossy fibers terminal fields) has a genetic background and is heritable (Barber, Vaughn, Wimer & Wimer, 1974;Crusio, Genthner-Grimm & Schwegler, 2007;Peirce, Chesler, Williams & Lu, 2003;Vaughn, Matthews, Barber, Wimer & Wimer, 1977). Parallel to this, profiling of hippocampal gene expression in different mouse strains indicated significant strain-dependent variation in brain protein expression (Gökçek-Saraç, Karakurt, Adalı & Jakubowska-Doğru, 2012;Pollak, John, Scharl, Leisch, Schneider, Hoeger & Lubec, 2006). Interestingly, in our study, albino W rats known to have worse visual functions compared to pigmented rats including lower visual acuity (Prusky, Harker, Douglas & Whishaw, 2002) and impaired vision in both bright but also dim light due to light dazzling and lower rod density (Ilia & Jeffery, 2000) were as good as pigmented LE rats in the rate of learning in this visuospatial task.…”