Abstract
The present study was carried out to throw light on the anatomical, morphological and histological changes of oviductal infundibulum of pre-laying, laying and regressing reproductive stages of chicken (Gallus gallus domesticus L.) from indigenous (6-10 months), sonali (3-19 months) and rhode island red (RIR) (4-18 months) breeds. Anatomically, the infundibulum of pre-laying chicks from each breed was not well differentiated into funnel and neck parts, but in laying and regressing hens it was subdivided into two regions. The morphological parameters i.e. length, breadth and weight were determined. The mean length of infundibulum at pre-laying, laying and regressing stages from three breeds were statistically significant (F2,6=9.35, p<0.05; F2,6=7.62, p<0.05; F2,6=41.93, p<0.01), the breadth showed insignificant mean values in pre-laying and laying stages (F2,6=2.56, p>0.05; F2,6=3.36, p>0.05) whereas in regressing stages it was significantly different (F2,6=5.60; p<0.05). The mean values of weight were insignificant in pre-laying and regressing stages (F2,6=0.89, p>0.05; F2,6=1.25, p>0.05) whereas they showed significant difference in laying stage (F2,6=7.81, p<0.05). For the histological study, the paraffin sections (5-6 μm) from neck were prepared and stained with hematoxylin and eosin and histological layers were recognized under light microscope. The histological features varied in regards to the mucosal folding, sub-mucosa, mascularis and serosa in different reproductive stages in all breeds. The anatomy, morphology and histology of infundibulum revealed that the differences among three breeds resulted from breeds’ variety and in three different stages for the cellular changes by accumulation of secretory materials for egg production. Thus, this study might be helpful to chicken producer, geneticist and conservationist.
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