Estrus synchronization and artificial insemination in Korean black goat (Capra hircus coreanae) using frozen-thawed semen

被引:1
|
作者
Kim, Kwan-Woo [1 ]
Lee, Jinwook [1 ]
Kim, Keun Jung [2 ]
Eun-Do Lee [1 ]
Kim, Sung Woo [1 ]
Lee, Sung-Soo [1 ]
Lee, Sang-Hoon [1 ]
机构
[1] Natl Inst Anim Sci, Rural Dev Adm, Anim Genet Resources Res Ctr, Hamyang 50000, South Korea
[2] Inst Chungnam Livestock Res, Cheongyang 33350, South Korea
关键词
GONADOTROPIN-RELEASING-HORMONE; LACTATING DAIRY-COWS; SHORT-TERM PROTOCOL; PREGNANCY RATES; CONCEPTION RATE; PROGESTERONE; CIDR; OVULATION; FERTILITY; OVSYNCH;
D O I
10.5187/jast.2021.e10
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Presently, there is an increased demand for livestock products all over the world which has led to more devotion on improving livestock population. Although goats have been bred for a long time in Korea, but there is not much research conducted on traditional Korean black goat (Capra hircus coreanae) compared to other livestock populations. Mutton consumption has been dramatically changing from medicinal use to edible meat and this trend directs the black goat populations declining and also mutton import quantities are increasing consistently. The present study introduced a new estrus synchronizing technique with subsequent artificial insemination (AI) for Korean black goats to enable crossbreeding with non-native breeds for the small or subsistent farmers. Our data highlighted that, the percentage of motile sperm from the electro-ejaculated samples declined significantly after freezing and melting. In addition, the sperm motility significantly declined with regard to sperm incubation period (0, 5, 60, and 120 min at 37 degrees C) and was negatively correlated (64.2 +/- 7.9%, 63.3 +/- 5.8%, 49.9 +/- 6.3%, and 35.9 +/- 7.6%, respectively) in frozen-thawed sperm samples. Moreover, the E2 levels were unchanged even 24 h after controlled internal drug releas (CIDR) withdrawal. But, 48 h and 72 h after CIDR removal, E2 levels increased significantly. These data helps us to consider the two time points forAI; CIDR removal after 24 h, at which E2 decreases, and after 48 h, as the time at which progesterone increases. Additionally, the AI after 48 h of CIDR removal group exhibited significantly higher pregnancy and parturition rates (42.9%) compared to AI after 24 h after CIDR removal 28.6% group. In conclusion, these studies will propose an optimal estrus synchronisation process with subsequent timing of AI and also will promote the Korean black goat breeding industry.
引用
收藏
页码:36 / 45
页数:10
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