highly significantP = 0.0004
Indeed, when the effect of sperm source was compared in analyses within each NPYq-deficient genotype, comet tails were significantly longer in epididymal sperm as compared to testicular sperm from NPYq- 2 ( P = 0.0034), and this resulted in a highly significant genotype/sperm source interaction ( P = 0.0004) when NPYq- 2 was compared with its matched XY RIII control.