extremely significantp < 0.01
Comparison of the same developmental period in both pig breeds revealed extremely significant differences between groups ( p < 0.01), and it is noteworthy that the values of the parameters (the perimeter and area of the tubular lumen) in HZ boars were greater than those in LC boars in the 1 M, 3 M, 4 M, and 6 M groups, and stabilized in the 4 M, 6 M, and 8 M groups.