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Kerala Veterinary and Animal Sciences University, Wayanad

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20151
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Subject: Veterinary Physiology × Author: ABHINA M × Start date: 1994 ×
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    ThesisItemOpen Access
    DIFFERENTIAL FOLLICULAR MORPHOLOGY AND BMPR1B GENE EXPRESSION IN MALABARI AND ATTAPPADY BLACK BREEDS OF GOATS
    (COLLEGE OF VETERINARY AND ANIMAL SCIENCES-MANNUTHY,THRISSUR, 2015) ABHINA M; Raji K
    Prolificacy difference between two native goat breeds of Kerala, Malabari and Attappady black has been evaluated by morphometric, histological, hormonal and gene expression studies. Six numbers each of Malabari and Attappady black goat breeds were used for the study. Even though there was no significant difference, the morphometric parameters (weight, length and breadth) recorded were more in Malabari than Attappady black breed of goats. The follicular development was studied by classifying the follicles based on size into very small (<1mm), small (1-3mm) and large (3-5mm). The total number of follicles was more in Malabari when compared to Attappady black. However, follicles classified under small size were more in Attappady breed of goats whereas, follicles under very small size and large size were more in Malabari. Haematoxylin and eosin stained sections were examined for histological studies and the different categories of follicles namely primordial, primary, secondary and antral were compared between breeds. The diameter of secondary follicle and the oocyte were significantly different with a higher mean value for Attappady breed. The ratio of granulosa cell to secondary follicle diameter and the ratio of oocyte to secondary follicle diameter were found to be significantly different between the breeds with higher mean in Malabari breed. The mean diameter of the antrum in Attappady breed was higher than Malabari breed. The ratio of granulosa cell to the antral follicle diameter was not significantly different between breeds. The serum oestrogen concentration was found to be significantly different between the breeds with Malabari having a higher mean (± S.E) 41.69 ± 7.50 pg/mL when compared to the Attappady breed with a mean (± S.E) 20.20 ± 4.40 pg/mL. There was no significant difference in the BMPR1B gene expression level between breeds. However, there was significant down regulation of BMPR1B expression in large follicles compared to small ones.