Dinamika Ovarium pada Kuda Hasil Persilangan Pejantan Thoroughbred dengan Induk Lokal Indonesia
Abstract: The development of
horse breeding industry in Indonesia was commenced through horse racing events
held all over the country. It were accelerated by the development of
Thoroughbred-Indonesian local Crossbred horses. There are many broodmares
injured during their racing time and retired from the racetracks. They may
still has a reproductive vigor to continue on producing offsprings. Very little
information has been reported on the monitoring the reproductive capacity of
the mares. The objective of this study was to explore ultrasonography imaging
of the ovarian dynamics, correlated with the estrus behavior of the
Thoroughbred-Indonesian local crossbred mares. Three Thoroughbred-Indonesian
local crossbred mares with 6.25-12.5% of local genetics aged 12-20 years old
were used in this study. Estrus and ovulation were synchronized by 10 mg PGF2α
i.m. at luteal phase and 1,500 IU hCG i.m. injection when the dominant follicle
reach ≥30 mm in diameter. Ultrasonography examination was done every morning at
approximately at the same time. Estrus behavior was observed by using teaser
stallions following a standard method. Results of the experiment indicated that
onset of the estrus was reached 1.33±0.58 days after the hCG injection, with
the average duration of 4.00±1.00 days. The ovulations were done at 5.33±1.15
days after PGF2α treatment and 66.67±10.07 hours after hCG treatment. Maximum
follicle diameter was identified to reach 4.50±0.52 cm at one day before
ovulation. The mares performed 25.4±3.38 days length of estrus cycle with 2-3
follicular waves. It had been identified
that the estrus duration was 6.8±1.92
days in mares with the age of
12-20 years. The average of maximum diameter of the largest follicle before
ovulation was 4.2±1.24 cm. In conclusion, to improve the efficiency of breeding,
several information are needed i.e. the optimal time of ovulation, relevan
parameters related to follicular development.
Keywords: Cycle; Estrus;
Mares; Ovarian dynamics; Ultrasonography
Penulis: Muhammad Danang Eko
Yulianto, Bambang Purwantara, Amrozi
Kode Jurnal: jppeternakandd160230
