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Position: Home > Articles > RECENT DEVELOPMENT OF ANIMAL REPRODUCTION AND AI IN CHINA Scientia Agricultura Sinica 1980,13 (2) 90-96

中国家畜繁殖及人工授精的进展概述

作  者：
郑丕留;梁克用;董伟;安民;杨学时
单  位：
中国农业科学院
摘  要：
中国家畜繁殖和人工授精早在五十年代初期即在马、牛、羊、猪中已开始研究和立用,近年来有了不同程度的发展,加速了家畜改良及育种工作的进展。牛冷冻精液已应用于生产,绵羊、猪及马的精液冷冻保存,牛、羊及猪的同期发情及牛、羊胚胎移植均
译  名：
RECENT DEVELOPMENT OF ANIMAL REPRODUCTION AND AI IN CHINA
作  者：
Cheng Pei-lieu, W. Tung, M. An, Y. S. Yang, K. Y. Liang (Chinese Academy of Agricultural Sciences) (Dept. Animal Husbandry, Peking Agricultural University) (Institute of Animal Husbandry, Jilin Provincial Academy of Agrioultural Sciences)
摘  要：
AI AND FROZEN SEMENAI has been extensively used in horse breeding since 1950.In sheep, about 90% of ewes were artificially inseminated in 9 sheep raising provinces in the North, pregnancy rates 50% to 85%.AI of dairy cattle started in early 50's, and now about 80% of the cows were inseminated with frozen semen. In water buffalo, frozen semen has also been used in 40, 000 cows in 1978, pregnancy rate 42.7%.In yellow cattle, about 1,050,000 breeding cows were inseminated with frozen semen in 1978. Frozen semen has also been used in the AI of yaks. In pigs, about 4.2% of the breeding females(or 970,000 head) were in AI. Since 1974, studies have been made on the frozen semen of sheep, and pig and horse, with the pregnancy rates of 39.4% in sheep, 40-58% in pig 62.5% in horse.ESTRUS SYNCHRONIZATIONResults of experiments on cattle estrus synchronization showed that about 80% of treated animals simultaneously came into estrus 2-4 days after (1) subcutaneous implantation of 20-30 mg of progestrone for 10-12 days. (2)oral administration of Megestrol (MA) 7-20mg per day for 10-16 days, (3)a single intracervical infusion of 12-mg of 15-methyl PGF_(1α), or 13-dehydro-ethyl PGF or PGF methyl ester. In most cases, conception rates after synchronized estras were 30% to 40%.EMBRYO TRANSFEREmbryo transfer in sheep started since 1973. FSH, LH(or LRH) or PMS were used to induee superovulation in sheep, Results from 211 ewes of five breeds showed that the average number of ovulations and embryos recovered per ewe were 10-18.9 and 7.7-14.4 respectively. The ova fertilized were 83.2% to 93.1%.The lambing rates from embryo transfer were 58.6% to 72.1%, one of the donor produced 20 embryos, 10 lambs were obtained from 18 recipients.The first calf from embryo transfer was born in August, 1978. The pregnancy rate of the embryo transfer in cattle was 25%(16/64).

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