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Abstract

Hofmann (1935) submitted a proposal, using a timed mating and farrowing system to program the reproductive dates in a sow herd and thus to direct the breeding and production cycle taut. In 1958 to 1964, the developed system of periodic farrowing was operated in Thuringia first farms successfully...

Author(s)
Hühn, U.; Wähner, M.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2016, 88, 4, pp 268-281
Abstract

Most of the data included in this publication refer to the period prior to German unification in Oct. 1990. A small appendix is devoted to details of the breeding of herdbook cattle, artificial insemination, performance testing and breeding value estimation in the former German Democratic Republic. ...

Publisher
Arbeitsgemeinschaft Deutscher Rinderzüchter, Bonn, Germany
Citation
Rinderproduktion in der Bundesrepublik Deutschland 1990, 1991, pp 225pp.
Abstract

From 1977 to 1984, the number of inseminations carried out in the German Democratic Republic decreased from 2 724 900 to 2 615 500, while the 90- to 120-day NR rate increased from 52.1 to 57.1%. Over the same period, the av. age at 1st insemination increased from 558 to 638 days, av. age at 1st...

Author(s)
Peter, W.; Jenichen, W.
Citation
Monatshefte für Veterinärmedizin, 1986, 41, 6, pp 181-185
Abstract

Artificial insemination of sheep began in 1956, when 756 ewes were inseminated with semen from 6 rams. In 1985, 17 980 ewes were inseminated (representing 81.3% of the total number of ♀♀), using semen from 93 rams; semen from progeny-tested rams was used for 91.6% of inseminations. The number of...

Author(s)
Becker, K.; Liebscher, D.; Hennig, H.
Citation
Tierzucht, 1986, 40, 9, pp 422-425
Abstract

From 1970 to 1980 in the German Democratic Republic, the number of 1st inseminations in cattle increased from 2 556 700 to 2 691 860, the proportion of progeny tested bulls from 78.3 to 90.3%, and the number of semen doses produced annually per tested bull from 13 606 to 22 682. In 1980, the CR to...

Author(s)
Baum, N.; Peter, W.
Citation
Monatshefte fur Veterinarmedizin, 1981, 36, 17, pp 641-645
Abstract

The procedures used for synchronization of oestrus and artificial insemination of gilts and sows in the German Democratic Republic are described. Treatment with methallibure followed by PMSG to synchronize oestrus has now been replaced in 60% of gilts and sows by HCG or GnRH followed by PMSG....

Author(s)
Hühn, U.; König, I.
Citation
Pig News and Information, 1989, 10, 2, pp 173-176
Abstract

Since 1975, >99% of cows in the German Democratic Republic have been artificially inseminated each year. In 1983, the number of insemination doses produced per AI bull averaged 25 000, and some bulls produced up to 50 000 insemination doses. The NR rate to 1st insemination was 55% in 1983. The...

Author(s)
Peter, W.
Citation
Tierzucht, 1984, 38, 11, pp 506-508
Abstract

In 1983, in the German Democratic Republic, >80% of sows were inseminated, and >1.8 million 1st inseminations were carried out. The CR of inseminated sows was 77.3%, and litter size at birth and weaning averaged 10.5 and 9.9 piglets resp. Semen from progeny-tested boars was used for 84.7% of 1st ...

Author(s)
Mudra, K.; Conrad, F.
Citation
Tierzucht, 1984, 38, 11, pp 508-511
Abstract

Artificial Insemination results for the German Democratic Republic for 1981 (results for 1970 in brackets) are as follows: number of AI boars, 4553 (720); number of 1st inseminations, 1 690 000 (160 000); farrowing rate, 78.6% (72.0); number of piglets born alive per litter, 9.94 (9.1); number of...

Author(s)
Fritzsche, J.
Publisher
Madrid, Spain
Citation
34th Annual Meeting of the European Association for Animal Production, Madrid, Spain, 3rd-6th October, 1981. Volume II. Summaries. Study Commissions. Cattle, Sheep and Goats, Pigs, Horses., 1983, pp 742-743
Abstract

In 1986, in the German Democratic Republic, 404 106 ewes were inseminated, representing 62.5% of the total population vs. 356 821 ewes, representing 55.0% of the total, in 1980. The CR was 62.5% in 1986 vs. 60.4% in 1980. Research on the effects of semen diluents, duration of semen storage, semen...

Author(s)
Peter, W.; Nehring, H.; Ueckert, H.
Citation
Tierzucht, 1988, 42, 7, pp 316-319

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