author(s)
S Bharti, R Vaish, N Gupta, Y Pandey, N Rajput and RP Singh

abstract
The comparative study was conducted on female reproductive system of 48 layers of Kadaknath and White Leghorn with 24 birds in each breed. These birds were divided into 04 groups viz; group I (24 weeks), group II (32 weeks), group III (40 weeks) and group IV (48 weeks). Gross morphological and histological observations revealed the presence of fibromelanin in the magnum of Kadaknath which confirms fibromelanosis in the reproductive system of this native breed. The mean length of the magnum was 2.22±0.09 cm in group I of Kadaknath which suddenly increased to 23.70±0.94 cm in group II. However, in WLH the length was 34.38±1.07 cm in group I which gradually reduced and became 17.48±1.02 cm in group IV. The wall thickness of magnum was 315.92±1.79 µm in group I which increased to 685.67±1.71 µm in group IV of Kadaknath fowl. The wall thickness was greater in WLH in comparison to Kadaknath except in group IV where total wall thickness in Kadaknath (685.67±1.71 µm) was greater than WLH (448.54±3.02 µm).