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Animal Science Database

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AbstractFull Text

The effect of artificial insemination (AI), embryo transfer (ET) to bull dams (BD), and sexed semen (SS) to cow dams (CD) with and without controlling inbreeding were studied using stochastic simulation. Three levels of embryo transfer (no ET, ET on all BD, and ET on 20% of BD), five levels of...

Author(s)
Faraji-Arough, H.; Rokouei, M.; Maghsoudi, A.; Mehri, M.; Mahyari, S. A.; Sorensen, A. C.
Publisher
Islamic Azad University, Rasht, Iran
Citation
Iranian Journal of Applied Animal Science, 2019, 9, 1, pp 59-71
Abstract

The objective of this study was to evaluate the efficacy of intravenous infusion of hypertonic glucose for recycling of the cows with postpartum anestrus. One hundred true anestrus Holstein-Frisian cows with ≥60 days in milk (DIM) according to the ultrasound examinations were selected from a dairy...

Author(s)
Oskoee, S. F. M.; Hamali, H.; Asadpour, R.
Publisher
Banat's University of Agricultural Sciences and Veterinary Medicine, Timisoara, Romania
Citation
Banat's Journal of Biotechnology, 2017, 8, 16, pp 133-139
Abstract

The aim of this study was to consider reproductive performance parameters and blood progesterone concentration changes in high-producing dairy cows (39±2 kg per day) after artificial insemination, in summer and winter. 270 heads of Holstein dairy cattle were choose in three big dairy farms, and...

Author(s)
Dashti, H.; Riasi, A.; Edris, M. A.; Gohrbani, G. R.; Omidi-Mirzaei, H.
Publisher
University of Tehran, Tehran, Iran
Citation
Iranian Journal of Animal Science (IJAS), 2016, 47, 2, pp Pe321-Pe327
AbstractFull Text

The edited data set for the estimation of heritability, genetic and phenotypic correlations of fertility traits contained up to 23,402 records from 10,894 cows calved between 2001 and 2015. Heritability estimates for success in first service (FS), gestation length (GL), number of inseminations...

Author(s)
Rahbar, R.; Aminafshar, M.; Abdullahpour, R.; Chamani, M.
Publisher
Universidade Estadual de Maringá, Maringá, Brazil
Citation
Acta Scientiarum - Animal Sciences, 2016, 38, 3, pp 333-340
Abstract

The aim of the study was to evaluate the impact of phenotypic factors on the probability of conception to first service. The study analysed 49317 lactation records gathered between 1995 and 2007 in Iran, detailing six consecutive lactations in 13 herds of Holstein cows. The impact of phenotypic...

Author(s)
Ghiasi, H.; Piwczyński, D.; Khaldari, M.; Kolenda, M.
Publisher
CSIRO, Collingwood, Australia
Citation
Animal Production Science, 2016, 56, 7, pp 1061-1069
AbstractFull Text

A total of 72124 fertility records was used to estimate the genetic and phenotypic trend of fertility traits in Iranian Holstein cow from 1981 to 2007. Fertility traits in this study were: days from calving to first service (DFS), number of insemination per conception (INS), days open (DO),...

Author(s)
Ghiasi, H.; Honarvar, M.
Publisher
Islamic Azad University, Rasht, Iran
Citation
Iranian Journal of Applied Animal Science, 2016, 6, 1, pp 55-59
Abstract

Reproductive efficiency of dairy cows is low mainly due to reduction in conception and estrous detection. Ovsynch protocol (synchronization of ovulation) has been developed to improve the pregnancy rate in dairy farms. Therefore, the present study was performed to compare pregnancy rate using the...

Author(s)
Tazangi, M. K. E.; Mirzaei, A.
Publisher
École Nationale Vétérinaire de Toulouse, Toulouse, France
Citation
Revue de Médecine Vétérinaire, 2015, 166, 11/12, pp 345-349
AbstractFull Text

BACKGROUND: To improve breeding programs in dairy cattle artificial insemination using sexed sperm has been applied in different farms. OBJECTIVES: To evaluate pregnancy rate and economic benefit of artificial insemination with sexed sperm in Holstein dairy heifers of Shiraz industrial farms....

Author(s)
Chalmeh, A. A.; Ahmadi, M. H. N.; Tamadon, A.; Alipour, M.; Taghipour, Z.
Publisher
Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
Citation
Journal of Veterinary Research, 2012, 67, 4, pp 359-363
Abstract

The objective of this present study was to investigate relationships between the growth hormone gene restriction fragment length polymorphism (RFLP) and bull sperm characteristics. A total of 89 bulls from two semen evaluation stations were genotyped for the bovine growth hormone (bGH)-AluI...

Author(s)
Afshar, K. P.; Javanmard, A.; Asadzadeh, N.; Sadeghipanah, H.; Masomi, H.; Sabrivand, A.
Publisher
Academic Journals, Nairobi, Kenya
Citation
African Journal of Biotechnology, 2011, 10, 6, pp 882-886
Abstract

In last decade, pregnancy loss in dairy cattle has had an upward trend bringing difficulties for breeders: the annual cost is estimated around 396 billion Rials (i.e. around 40 million US$) for the Iranian dairy industry. The present study was conducted to determine the influence of maternal...

Author(s)
Rafati, N.; Mehrabani-Yeganeh, H.; Hanson, T. E.
Publisher
Elsevier B.V., Amsterdam, The Netherlands
Citation
Preventive Veterinary Medicine, 2010, 96, 3/4, pp 170-178

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