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The present investigation was done in the esterase gene expression analysis of the Red Jungle fowl Gallus gallus of Bangladesh utilizing the polyacrylamide gel electrophoresis (PAGE) technique. Each allele produces a biochemical message that helps to produce various protein phenotypes those were expressed in the form of bands on the polyacrylamide gel bed. Altogether four different esterase bands were recorded in both Red Jungle (RJ) fowl and Naked Neck (NN) fowl of Bangladesh. These were denoted as Est-1 (2), Est-2(1), Est-3 (21) and Est-4 (13) based on the relative mobility on the gel. Among them Est-2 is very common in almost all tissues. Comparing the esterase in both genetic groups, their expression intensity even the relative mobility provided a unique feature that they were similar. The investigation indicates that esterase gene between the Red Jungle fowl and Naked Neck fowl of Bangladesh has a close relationship. DOI: http://dx.doi.org/10.3329/bjas.v38i1-2.9908 BJAS 2009; 38(1-2): 15-21

The present study was undertaken to measure estrus response (%), interval to estrus (hr), duration of estrus and conception rate (%) after synchronization in Black Bengal does. Synchronization of estrus was done by intramuscular injection of synthetic PGF 2α as dinoprost ® . Two trials were conducted with twenty cyclic fertile adult Black Bengal does. The age and body weight of the does were between 18 to 21 months and 11-13 kg, respectively. After synchronization all the does were observed closely up to 48 hours to note the estrus behavior. All the signs or behavior of synchronized estrus were recorded in details. Out of 20 does, 19 does showed behavioral signs of heat and expressed estrus behavior after synchronizing with synthetic PGF 2α as dinoprost ® injection. The behavioral estrus was found after 45.5 hours and 45 hours injected with 2 ml and 1 ml dinoprost ® , respectively. The duration of estrus was recorded 51 hours and 23 hours for does treated with 2 ml and 1 ml dinoprost ® , respectively. The conception rate was observed 42.86% and 40.00% treated with 2 ml and 1 ml, respectively. From the result of this study it can be concluded that synchronization of estrus with 1 ml of dinoprost ® , may be used for inducing estrus of Black Bengal doe under Bangladesh condition. DOI: http://dx.doi.org/10.3329/bjas.v38i1-2.9907 BJAS 2009; 38(1-2): 7-14