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Abstract

The good results obtained in the improvement of livestock in the U.S.S.R. by selection and inbreeding are briefly discussed. The possible danger of such a policy is pointed out and illustrated by the case of the Mazoev breed of sheep, which was noted for length of wool. Over concentration on this...

Author(s)
MILOVANOV, V. K.; SMIRNOV-UGRYUMOV, D. V.
Publisher
Moscow : SePkhozgiz,
Citation
Osemenenie sel'skokhozyaistvennykh zhivotnykh., 1944, pp 100 pp.
Abstract

Author(s)
Polge, C.
Publisher
CABI Publishing, Wallingford, UK
Citation
Animal Breeding Abstracts, 1956, 24, 3, pp 209-217
Abstract

Alliston, C. W., and Ulberg, L. C. The influence of ambient temperature on early pregnancy loss as determined by embryo transfer: 1550. Anderson, D. E. The influence of environment on cancer eye in cattle: 1461-1462. Anderson, L. L., and Melampy, R. M. The effect of norethynodrel and...

Citation
Journal of Animal Science, 1959, 18, pp 1460-1568
Abstract

Data are given for the conception rates and farrowing results obtained with semen of 6 Large White boars and l Landrace. Over-all results were 68.2 % farrowed with 10.6 piglings per litter. Trials continued using I.V.T. and C.U.E. diluents on days 1-3. There was no appreciable fall in fertility...

Citation
Rep. Anim. Hlth Servs Gt Br., 1966, pp 115-119
Abstract

Dahmen, J.J.; Hulet, C.V.; Price, D.A.; Everson, D.O. Effects of drylot and pasture management on ovulation rate in sheep: 204-205.Dave, B.K.; Graves, C.N. Enzymes of follicular fluid and effect on sperm: 205.Douglas, R.H.; Ginther, O.J. Effect of PGF2 alpha on estrous cycle and pregnancy in mares: ...

Citation
Journal of Animal Science, 1974, 39, pp 135-139
Abstract

Frozen-thawed boar sperm (FTS) has reduced motility and viability compared to cooled semen. Motility of FTS is related to in vitro and in vivo fertility, but this effect has not been determined in relation to the timing of ovulation. To test the effect of variable FTS motility in a multiple-AI...

Author(s)
McNamara, K. A.; Knox, R. V.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2013, 91, 12, pp 5637-5645
Abstract

The selection of morphologically normal spermatozoa is critical to obtain high breeding performances in boar breeding farms and artificial insemination (AI) centers. Parameters for the selection of semen mainly include total sperm motility, concentration, and morphology. However, these primary...

Author(s)
Lee WonYoung; Lee Ran; Kim HeeChan; Lee KyungHoon; Cui XiangShun; Kim NamHyung; Kim SangHyun; Lee IlJoo; Uhm SangJun; Yoon MinJung; Song Hyuk
Publisher
Asian-Australasian Association of Animal Production Societies, Seoul, Korea Republic
Citation
Asian-Australasian Journal of Animal Sciences, 2014, 27, 10, pp 1417-1425
Abstract

Artificial insemination (AI) is the single most important assisted reproductive technique devised to facilitate the genetic improvement of livestock. In the swine industry, it has broadly replaced natural service over the last number of decades which has been made possible by the high pregnancy...

Author(s)
Fair, S.; Romero-Aguirregomezcorta, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 137, pp 15-22

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