Comparative Macro Anatomical Studies on the Female Reproductive Systemof KamrupaVarietyand Indigenous Chicken (Gallus domesticus) of Assam during Different Stages of Laying

The study was carried out to understand the anatomical details of the female reproductive system of the indigenous chicken of Assam and Kamrupa variety during the different stages of laying period namely, the pre-laying, laying and post-laying period.

The study was designed on 36 numbers of apparently healthy female chicken in each group as Experimental Group A (indigenous chicken of Assam) and Experimental Group B {Kamrupa variety, AICRP (PB)} which were further divided into 3 subgroups viz., pre-laying, laying and post-laying birds. Comparative gross anatomical parameters were undertaken. The birds were sacrificed as per the technique advocated by Gracey (1986) according the research age group. The abdominal cavity of each experimental bird was opened and anatomic location and relative in-situ topographic position of the female reproductive organs and biometrical parameters were recorded.

Average weight of entire reproductive system of Kamrupa variety (58.24±8.47 gm) was significantly higher than indigenous chicken of Assam (27.28±4.25 gm, p<.001). Average weight of the ovary of Kamrupa (laying: 54.91±4.92 gm, post laying: 6.53±0.33 gm) was significantly higher than that indigenous one (laying: 29.2±0.76 gm; post-laying: 2.26±0.24 gm, p<0.05). Relative mean length of the oviduct of Kamrupa variety (laying: 753.73±4.25 mm; post-laying: 576.49±5.27 mm) was significantly greater than indigenous chicken of Assam (laying: 358.91±3.63 mm; post-laying: 278.84±15.48 mm, p<0.05) respectively.