Comparative Study on Fresh Seminal Attributes of Jamnapari and Sirohi Bucks

The study aimed to evaluate and compare the physico-biochemical characteristics of fresh semen of Jamnapari and Sirohi bucks. Fresh semen was collected from six bucks (three Jamnapari and three Sirohi) twice a week for eight weeks, totaling 60 ejaculates (10 per buck), using an artificial vagina during the seasonal breeding period. The overall mean ejaculate volume was significantly greater (P=0.05) in Sirohi bucks as compared to Jamnapari bucks. Conversely, Jamnapari bucks (4.73 ± 0.11) demonstrated significantly higher (P=0.05) mass motility than Sirohi bucks (4.20 ± 0.15). However, sperm concentration and total sperm output per ejaculate did not differ significantly (P=0.05) between the Sirohi and Jamnapari breeds. Additionally, in extended semen, there was no significant difference between the Jamnapari and Sirohi goat sperm indices, except for the percentage of sperm acrosomal integrity and sperm abnormalities. Moreover, the ejaculate volume of Jamnapari and Sirohi bucks was significantly negatively correlated with sperm concentration (r = -0.255 & -0.595, P=.01) and positively correlated with total sperm output per ejaculate (r = 0.946 & 0.837, P=.01), respectively. Sperm motility was significantly positively correlated with sperm viability (r = 0.937 & 0.966, P=.01), percentage of acrosomal integrity (r = 0.88 & 0.969, P=.01), percentage of plasma membrane integrity (r = 0.850 and 0.945, P=.01), and sperm penetration distance in polyacrylamide gel (r = 0.964 & 0.981, P=.01). Conversely, it was negatively correlated with the percentage of sperm abnormalities (r = -0.592 & -0.898, P=.01), seminal plasma AST (r = -0.860 & -0.704, P=.01), and seminal plasma ALT (r = -0.744 & -0.827, P=.01) in Jamnapari and Sirohi bucks, respectively. Conclusively, the study established normal values of fresh semen for both Jamnapari and Sirohi bucks. Jamnapari bucks demonstrated superior semen quality parameters as compared to Sirohi bucks.