Amle, M. B.Nimse Pravin Ramdas2024-11-052024-11-052024-04-08https://krishikosh.egranth.ac.in/handle/1/5810216016The present research work was entitled “Augmentation of reproductive performance through controlled breeding in goats”. The experimental goats (n=30) were randomly allocated in three groups, goats of two groups were synchronized by adopting two different synchronization protocols. The goats of Group-I (n=10) were synchronized by using Double Prostaglandin Protocol (inj. D-Cloprostenol 75μg) administered by intramuscular route 10 days apart, whereas, goats of Group-II (n=10) were synchronized by adopting a short progestagen treatment (0.3g progesterone) with the intravaginal insertion of CIDR kept in situ for a duration of 9 days. Group-III experimental goats (n = 10) were exposed with adult intact buck and observed for natural estrus. The goats of all the three groups were observed for natural/synchronized estrus and were mated with the adult intact proven buck during standing heat. The parameters viz estrus response, behavioural and physical signs of estrus, onset of estrus and estrus duration, pre-ovulatory follicular dimensions at estrus, conception rate and correlation between ovarian pre-ovulatory follicular size on conception in goats were studied. The goats of group I synchronized by employing double prostaglandin injections, the percentage (%) of showing estrus discharge, wagging of tail, receptive to mounting, frequent micturition and swelling of vulva were found to be 50.00, 100.00, 25.00, 75.00 and 12.50, respectively. The goats of group II treated with intravaginal insertion of CIDR the percentage (%) of wagging of tail, frequent micturition and swelling of vulva were recorded as 100.00, 71.42 and 14.28, respectively. The overall percentage of estrus symptoms (natural) like estrus discharge, wagging of tail, frequent micturition and swelling of vulva exhibited by goats in group III were observed as 30.00, 100.00 80.00, 20.00, respectively. The overall percentage of goats exhibiting estrus and estrus response in Group I, Group II and Group III were 80 %, 70 % & 100 %, respectively. The mean interval of exhibition of estrus (h) from the end of the treatment and mean duration of estrus (h) in does reported in present study in Group I, Group II and Group III were recorded as 63.63±9.93 and 39.56 ±2.40, 45.86±1.64 and 45.14±3.27 and 0.00±0.00 and 37.50±1.77, respectively. The trans-rectal ultrasonic images in terms of diameter of ovarian preovulatory follicles (mm) (Mean ± SE) during estrus in does in Group I, Group II and Group III were recorded as 7.30 ±0.56, 6.85 ±0.12 and 7.01 ± 0.42, respectively. The goats subjected for double injection regimen of PGF2α for estrus synchronization shown marginally larger pre-ovulatory follicular size during estrus Conception rates of goats belonging to Group I, Group II and Group III were found to be 87.5 %, 57.14% and 70 %, respectively. Higher conception rates following double PGF2α protocol for synchronization of estrus in goats were observed. The mean dimensions of pre-ovulatory follicles and conception rate in does Group I, Group II, and Group III were recorded and there was no significant correlation between pre-ovulatory follicle size and conception rates in does exhibiting natural as well as induced estrus.EnglishThesis