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Journal articles on the topic 'Sheep Fertility'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Raoof, Salim Omar. "Role of Sex Chromatin on performance in the Arabi sheep." Iraqi Journal of Veterinary Medicine 41, no. 1 (June 5, 2017): 145–50. http://dx.doi.org/10.30539/iraqijvm.v41i1.97.

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This study was conducted on 122 Arabi sheep belonged to private flock in Erbil plain Kurdistan region- Iraq, from July/ 2014 to August/ 2015 for studying the role of sex chromatin on daily milk production, total milk production, lactation period, fertility rate, prolificacy, birth weight and fertilizes estrous sequences. The repeatability for the studied traits were estimated. The ratio of sex chromatin shapes drum stick, sessile nodule, tear drop and small club were 23.37%, 60.22%, 8.54% and 7.87% respectively.The overall means of daily milk production, total milk production, lactation period

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2

Petrovic, Milan, V. Caro-Petrovic, D. Ruzic-Muslic, N. Maksimovic, Z. Ilic, B. Milosevic, and J. Stojkovic. "Some important factors affecting fertility in sheep." Biotehnologija u stocarstvu 28, no. 3 (2012): 517–28. http://dx.doi.org/10.2298/bah1203517p.

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Efficiency of sheep production is conditioned by fertility. According to some authors number of offspring obtained per lambing is more important than gain of weight. Genetic relationships involving reproductive traits were seldom studied. Reproductive traits have low heritabilities, a discrete phenotypic expression, and are expressed only in sexually mature ewes leading to low selection intensities and long generation intervals. Documentation of realized selection response is also often complicated by the low heritabilities of fertility traits. Existence of a major gene affecting prolificacy h

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PAPADOPOULOS (Σ. ΠΑΠΑΔΟΠΟΥΛΟΣ), S., E. THEODOSIADOU (Α. ΘΕΟΔΟΣΙΑΔΟΥ), D. KANTAS (Δ. ΚΑΝΤΑΣ), and E. VALASI (Ε. ΒΑΛΑΣΗ). "The application of in vitro fertilization techniques for the evaluation of ram fertility." Journal of the Hellenic Veterinary Medical Society 66, no. 2 (January 31, 2018): 63. http://dx.doi.org/10.12681/jhvms.15588.

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The prediction of field fertility of a given ram by using in vitro tests would be of great importance for the reproductive management in sheep flocks. There are many in vitro procedures available for evaluating semen quality and fertilizing ability, and the method chosen depends on the objective of evaluating the sperm and the available resources. The in vitro evaluation of semen fertilizing ability was firstly developed for the artificial insemination (AI) purposes and secondly for the application of in vitro fertilization (IVF) technique. The IVF techniques allow the assessment of fertility

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4

Vlasenko, S., O. Zhulinska, and O. Yeroshenko. "Clinical and laboratory prognostic indicators for fertility in sheep." Naukovij vìsnik veterinarnoï medicini, no. 1(149) (May 30, 2019): 6–14. http://dx.doi.org/10.33245/2310-4902-2019-149-1-6-14.

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With the use of technology of artificial insemination in sheep farms are not yet defined criteria for assessing the full value of the preparation of females for insemination, and hence – the possibility of prediction and correction of their fertilization, which prevents the rational use of cryopreserved semen and ensuring the maximum reception of the offspring. We have proved the prognostic importance of fertilization of the morphofunctional state of the vulva and the vagina and the quality of mucus in sheep breeds during estrus. The material of the study was 327 sheep of ascanian breeding, wh

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5

Scaramuzzi, RJ, JA Downing, BK Campbell, and Y. Cognie. "Control of Fertility and Fecundity of Sheep by Means of Hormonal Manipulation." Australian Journal of Biological Sciences 41, no. 1 (1988): 37. http://dx.doi.org/10.1071/bi9880037.

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The results of four experiments are presented in summary form. The data are considered in relationship to the improvement of the fecundity and fertility of the Australian ewe breeding flock. In the first, three commonly used methods of oestrous synchronization were examined and showed differences that are attributed to the different patterns of hormonal changes associated with the methods demonstrated. The second experiment looked at the use of active immunization against testosterone and concluded that this method can improve fecundity but not fertility. The third experiment, a group of five

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6

Maxwell, W. M. C., and H. R. Wilson. "Fertility of fresh, chilled and frozen merino sheep embryos." Theriogenology 41, no. 1 (January 1994): 251. http://dx.doi.org/10.1016/s0093-691x(05)80161-x.

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7

Evans, A. C. O. "Ovarian follicle growth and consequences for fertility in sheep." Animal Reproduction Science 78, no. 3-4 (October 2003): 289–306. http://dx.doi.org/10.1016/s0378-4320(03)00096-4.

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8

David, Ingrid, Philippa Kohnke, Gilles Lagriffoul, Olivier Praud, Franck Plouarboué, Pierre Degond, and Xavier Druart. "Mass sperm motility is associated with fertility in sheep." Animal Reproduction Science 161 (October 2015): 75–81. http://dx.doi.org/10.1016/j.anireprosci.2015.08.006.

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9

Boland, M. P., and T. F. Crosby. "Fecundin: An immunological approach to enhance fertility in sheep." Animal Reproduction Science 33, no. 1-4 (October 1993): 143–58. http://dx.doi.org/10.1016/0378-4320(93)90112-5.

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10

Bortoletti, G., F. Gabriele, V. Seu, and C. Palmas. "Epidemiology of hydatid disease in Sardinia: a study of fertility of cysts in sheep." Journal of Helminthology 64, no. 3 (September 1990): 212–16. http://dx.doi.org/10.1017/s0022149x00012189.

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ABSTRACTHydatidosis, caused by Echinococcus granulosus, is a cyclozoonotic disease of economic significance in Sardinia. The life-cycle involves stray and sheep dogs as definitive hosts and sheep, pigs, goats and cattle as intermediate hosts. The most important intermediate host is sheep, due to home slaughtering with ready access of the viscera to dogs. This survey was undertaken in 1987 to ascertain the epidemiological significance of sheep in maintaining the life-cycle. A total of 700 (91·3%) of 767 sheep harboured hydatid cysts. The frequency distribution of the number of hydatid cysts was

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11

Vazic, Bozo, Biljana Rogic, Milanka Drinic, and Novo Przulj. "Relationship between the genetic hemoglobin polymorphism, morphometry and fertility of Pramenka sheep breed from Central Bosnia." Genetika 49, no. 1 (2017): 151–60. http://dx.doi.org/10.2298/gensr1701151v.

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The characteristics of these sheep are highlighted depth measures of external appearance with modest width measures. Another weaker feature of Pramenka sheep is poor fertility. Despite the mentioned disadvantages, Pramenka sheep is the most grown sheep in Central Bosnia and sheep production is based on it. Methodical selection to improve the characteristics of Pramenka sheep has not applied. However, sheep breeders tend to improve the qualitative and quantitative characteristics of sheep, and that means more intensive work on the selection. In this sense, genetic markers are used to carry out

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12

Ceyhan, Ayhan, Ahmet Şekeroğlu, and Mustafa Duman. "Niğde İlinde Yetiştirilen Akkaraman Irkı Koyunların Bazı Döl Verim Özellikleri ve Kuzuların Büyüme Performansı." Turkish Journal of Agriculture - Food Science and Technology 7, no. 10 (October 12, 2019): 1509. http://dx.doi.org/10.24925/turjaf.v7i10.1509-1514.2249.

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In this study, growth performance of Akkaraman lambs and some fertility parameters of Akkaraman sheep raised in semi extensive farm conditions were investigated. A total of 6300 heads Akkaraman ewes (6000 ewes and 300 rams) housed in 34 farms located in central villages of Niğde province were evaluated between 2012 and 2016. The data of birth weight of 30161 lambs, body weight of 29517 lambs aged 90 days old and some fertility parameters of 30000 heads ewes were used. The average lambing rate of ewes was found 90.1%. The twining rate of ewes was 20.8%; the average litter size was 1.12 lambs. B

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13

Genkovski, D. "Productive indices of sheep breeds and varieties reared in the conditions of Central Balkan mountains." Biotehnologija u stocarstvu 22, no. 3-4 (2006): 55–64. http://dx.doi.org/10.2298/bah0604055g.

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Main productive indicators (live weight, wool-yield, wool length, economic fertility, biological fertility) at different ages of sheep from Karakachanska breed and Local Sredno Staroplaninsko and Tetevensko varieties were examined. The results showed that the sheep from Tetevensko variety indicated the highest values of live weight from the birth to 3.5 years of age, and the lowest - those from Karakachanska breed. The highest value of mean daily growth was examined from the birth to 3-months age in all groups of the study. It was highest for Tetevensko variety - 0.240 kg and for Karakachanska

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14

Hama, Abdulla Ahmed, Fatimah Mohammed Ali, Wijdan M. S. Mero, and Kalil Hassan. "Biochemical markers and fertility rate of hydatid cyst isolated from human and animal in Sulaimani province." Kurdistan Journal of Applied Research 2, no. 2 (July 30, 2017): 1–5. http://dx.doi.org/10.24017/science.2017.2.2.

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Hydatid disease is a helminthic infection, caused by the metacestode stage of cestode belonging to the Echinococcus grnulosus (dog tapeworm). The species and strain identification of Echinococcus are of medical importance for strategic control measuring. The present study achieved to determine and compare fertility and biochemical profiles of hydatid cyst fluid isolated from human, cattle, sheep and goat. The human originated cyst has been found to be more fertile (88%), followed by sheep-originated cyst (85%). The high rate of fertility was found in the liver followed by lungs in all intermed

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15

Petrovic, M. P., D. Ruzic-Muslic, M. Zujovic, and C. Mekic. "Genetic improvement of fertility in sheep by selection according to physiological parameters." Biotehnologija u stocarstvu 23, no. 5-6-1 (2007): 311–21. http://dx.doi.org/10.2298/bah0701311p.

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In this paper, fertility parameters of sheep are discussed and principles analyzed in order to obtain the optimal methods for their evaluation. Mathematical procedures for evaluation of genetic and phenotypic parameters and anticipation of genetic values, today, are mainly based on different linear and non-linear concepts, therefore it is necessary to accept the reality that there is no absolute accuracy. Special emphasis is on the possibility of use of physiological quantitative fertility indicators in sheep selection, considering that there is correlation between them and fertility traits. I

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16

Dolebo, Asrat Tera, Negar Khayatzadeh, Aberra Melesse, David Wragg, Mourad Rekik, Aynalem Haile, Barbara Rischkowsky, Max F. Rothschild, and Joram M. Mwacharo. "Genome-wide scans identify known and novel regions associated with prolificacy and reproduction traits in a sub-Saharan African indigenous sheep (Ovis aries)." Mammalian Genome 30, no. 11-12 (November 22, 2019): 339–52. http://dx.doi.org/10.1007/s00335-019-09820-5.

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Abstract Maximizing the number of offspring born per female is a key functionality trait in commercial- and/or subsistence-oriented livestock enterprises. Although the number of offspring born is closely associated with female fertility and reproductive success, the genetic control of these traits remains poorly understood in sub-Saharan Africa livestock. Using selection signature analysis performed on Ovine HD BeadChip data from the prolific Bonga sheep in Ethiopia, 41 candidate regions under selection were identified. The analysis revealed one strong selection signature on a candidate region

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17

Barry, T. N. "The role of condensed tannins in the nutritional value of Lotus pedunculatus for sheep." British Journal of Nutrition 54, no. 1 (July 1985): 211–17. http://dx.doi.org/10.1079/bjn19850106.

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1. Lotus pedunculatus (cv. Grasslands Maku) grown on acid low-fertility soil and containing high concentrations of condensed tannin (76–90 g/kg dry matter (DM)) was grazed by growing sheep for 31–42 d periods in three experiments. In Expt 2 an additional group of lambs grazed areas oversown with white clover (Trifolium repens) and red clover (Trifolium pratense). Lambs were transferred from grazing ryegrass (Lolium perenne) – white clover straight on to lotus in all experiments (unconditioned sheep). In Expt 3 a second group was included which had grazed high-tannin lotus for a pre-experimenta

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18

JEWELL, P. A. "Factors that affect fertility in a feral population of sheep." Zoological Journal of the Linnean Society 95, no. 2 (February 1989): 163–74. http://dx.doi.org/10.1111/j.1096-3642.1989.tb02310.x.

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19

Mir, M. R., and H. Geldermann. "Variant Molecular Marker in MHC Effect Fertility Trait in Sheep." Biotechnology(Faisalabad) 7, no. 4 (September 15, 2008): 787–92. http://dx.doi.org/10.3923/biotech.2008.787.792.

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20

Yamagami, Takuji, Rika Yoshimatsu, Tomohiro Matsumoto, Hiroshi Anzai, Masahiro Yoshizawa, Yutaka Fukui, and Tsunehiko Nishimura. "Fertility After Uterine Artery Embolization: Investigation Using a Sheep Model." Reproductive Sciences 17, no. 4 (November 30, 2009): 350–57. http://dx.doi.org/10.1177/1933719109353455.

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21

Laurent, Alexandre, Jean-Pierre Pelage, Michel Wassef, and Jacques Martal. "Fertility after bilateral uterine artery embolization in a sheep model." Fertility and Sterility 89, no. 5 (May 2008): 1371–83. http://dx.doi.org/10.1016/j.fertnstert.2007.03.058.

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22

Ferri, N., S. Ulisse, F. Aghini-Lombardi, F. M. Graziano, T. Di Mattia, F. P. Russo, M. Arizzi, et al. "Iodine supplementation restores fertility of sheep exposed to iodine deficiency." Journal of Endocrinological Investigation 26, no. 11 (November 2003): 1081–87. http://dx.doi.org/10.1007/bf03345254.

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23

Ajam, Ismael K., Thamer R. S. . Al-Jubouri, and Qayssar H. Ghayyib. "TGF-B Super Family Correlation with the Fertility of Iraqi Awassi Ewes." Basrah Journal of Agricultural Sciences 32 (September 4, 2019): 26–32. http://dx.doi.org/10.37077/25200860.2019.137.

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This study was conducted in Barakat Abu al Fadhl Al- Abbas station (AS) for raising sheep/a subsidiary of Al- Kafeel Company for General Investment and livestock services in Holy Karbala province and Babylon Province It was undertaken on Awassi sheep for between October, 2013 to May, 2014 to investigate the polymorphism of TGF-B gene and its association with reproductive traits of Awassi sheep. Blood samples were collected from (80) ewes included 35 samples of Awassi ewes producing twins (pure breed), 21 samples of Awassi ewes producing twins lambs (hybrid breed), also 25 samples of Awassi ewe

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Mekic, Civijan, Predrag Perisic, Zorica Novakovic, Milan Petrovic, and Radomir Vujic. "Sheep fertility during induction and estrus synchronisation in the anoestrus season depending of the body weight of tested eves." Veterinarski glasnik 68, no. 5-6 (2014): 323–30. http://dx.doi.org/10.2298/vetgl1406323m.

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The aim of this research was to determine if there are differences in sexual reaction of the grown sheep II de frans breed depending on the body weight of treated eves during induction and synchronization of estrus with fluorogestonacetate (FGA) + PMSG in anoestrus season. Total number of 262 eves was treated and they were divided in to three groups. The first group consisted of the sheep whose body weight was from 40 to 50kg, the second group of the sheep whose weight was from 50-60kg and the third group of the sheep whose weight was above 60kg. Each group received sponges of FGA. After remov

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Yildiz, K., and S. Gurcan. "Prevalence of hydatidosis and fertility of hydatid cysts in sheep in Kirikkale, Turkey." Acta Veterinaria Hungarica 51, no. 2 (March 1, 2003): 181–87. http://dx.doi.org/10.1556/avet.51.2003.2.6.

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This study was conducted in order to determine the prevalence and fertility of hydatid cysts in sheep in Kirikkale, Turkey. A total of 3.2% of 553 lambs and 50.9% of 1320 adults were found to be infected with hydatid cysts. The most common locations of cysts were in the liver and lung. Liver cysts tended to be more fertile than lung cysts (81.53% v. 76.47%), though the difference was not significant. The mean number of viable protoscoleces in the liver and lung cysts were 12,400 and 5,800, respectively. In general, 1-10 cysts were found in liver (51.8%) and lung (64.7%). The findings of this s

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Brash, LD, NM Fogarty, and AR Gilmour. "Reproductive performance and genetic parameters for Australian Dorset Sheep." Australian Journal of Agricultural Research 45, no. 2 (1994): 427. http://dx.doi.org/10.1071/ar9940427.

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Reproductive performance of ewes in a large Dorset stud flock is reported. The data included 2488 ewes with 10016 joining records over 25 years. Average performance for reproductive traits were: fertility 92%, litter size 1.31, neonatal lamb survival 91%, lamb survival to weaning 85%, with overall lambs born 1.20 and lambs weaned 1.02 per ewe joined. Differences between breeds (Poll Dorset and Dorset Horn), season of birth (spring and autumn) and season of joining (spring and autumn) were significant for most reproduction traits. Linear and quadratic regressions for age of ewe at joining were

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Awad, Nabil S., Mohamed M. Soliman, Alaa A. Mohamed, Ayman M. Sabry, Ahmad F. Shahaby, and Adel E. El-Tarras. "Effect of altitude on some male fertility related traits in Saudi ovine and caprine species." Annals of Animal Science 15, no. 3 (July 1, 2015): 641–53. http://dx.doi.org/10.1515/aoas-2015-0007.

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Abstract This study aimed to evaluate the effect of altitude on some male fertility related traits in Saudi sheep and goats. Testicular tissues were collected from a slaughterhouse in Taif governorate (1800 m above sea level) and Makkah governorate (sea level). Sperm characteristics (1 - individual motility, 2 - percent live sperm 3 - percent abnormal sperm) were examined. Semi-quantitative RT -PCR assay was used to evaluate the expression of IGF-II, StAR, LDLr and CYP11A genes. No significant effect of altitude on tested sperm parameters was revealed. Expression of IGF-II gene in both sheep a

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28

Stankov, K. "Economic efficiency of Bulgarian dairy synthetic population and Assaf sheep breeds." Agricultural Science and Technology 12, no. 1 (March 2020): 42–46. http://dx.doi.org/10.15547/ast.2020.01.008.

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Abstract. The economic efficiency of ewes from the Bulgarian dairy synthetic population (BDSP) and Assaf sheep breeds, reared in three production systems, e.g. grazing on pasture, stall-pasture rearing and stall rearing was studied. The results from the study showed that BDSP ewes in the stall-pasture rearing system had a relatively low milk yield for a specialised dairy sheep breed – 80L for the lactation period. In this system, without the subsidy, the profit and cost efficiency were negative, while with subsidy, minimum positive results were achieved. For BDSP ewes reared in a stall-pasture

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29

Newton, J. E., D. J. Brown, S. Dominik, and J. H. J. van der Werf. "Impact of young ewe fertility rate on risk and genetic gain in sheep-breeding programs using genomic selection." Animal Production Science 57, no. 8 (2017): 1653. http://dx.doi.org/10.1071/an15321.

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Genomic selection could be useful in sheep-breeding programs, especially if rams and ewes are first mated at an earlier age than is the current industry practice. However, young-ewe (1 year old) fertility rates are known to be lower and more variable than those of mature ewes. The aim of the present study was to evaluate how young-ewe fertility rate affects risk and expected genetic gain in Australian sheep-breeding programs that use genomic information and select ewes and rams at different ages. The study used stochastic simulation to model different flock age structures and young-ewe fertili

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OLIVEIRA, Marilza Assunção de, Roseane Pinto Martins de OLIVEIRA, Ana Rita de LIMA, Edmar Vaz de ANDRADE, Jan Sidarta Lima de ABREU, and Franklyn Ferreira de OLIVEIRA. "Physical evaluation, morphological and identification of seminal proteins in Santa Ines sheep." Revista Brasileira de Saúde e Produção Animal 18, no. 1 (March 2017): 211–20. http://dx.doi.org/10.1590/s1519-99402017000100020.

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SUMMARY This study aimed to identify proteins in the seminal plasma associated with fertility in sheep of Santa Inês in Manaus, AM, using twodimensional electrophoresis techniques associated with mass spectrometry. Semen samples from eight adult sheep were collected by removing an aliquot for the physical and morphological assessments of semen and seminal plasma was subjected to SDS-PAGE profile and two-dimensional electrophoresis. Gels were stained with colloidal Coomassie, scanned and analyzed using ImageMaster 2D Platinum software, version 6.0. The selected individual spots were cut from th

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31

Quereda, Juan J., Empar García-Roselló, Marta Barba, María L. Mocé, Jesús Gomis, Estrella Jiménez-Trigos, Esther Bataller, Rebeca Martínez-Boví, Ángel García-Muñoz, and Ángel Gómez-Martín. "Use of Probiotics in Intravaginal Sponges in Sheep: A Pilot Study." Animals 10, no. 4 (April 20, 2020): 719. http://dx.doi.org/10.3390/ani10040719.

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Sheep estrous synchronization is mainly based on progestagen-impregnated sponges which could cause vaginitis. Several species of Lactobacillus used as probiotics are commonly used in the treatment or prevention of urogenital infections in humans. However, no studies have been performed to analyze the potential use of probiotics to prevent urogenital infections in sheep. A randomized controlled clinical trial was conducted with 21 one-year-old ewes to develop a model of probiotic infusion in vaginal sponges in order to study their influence in ewe’s vaginal microbiota, general health status, fe

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al-Shorepy, S. A., and D. R. Notter. "Response to selection for fertility in a fall-lambing sheep flock." Journal of Animal Science 75, no. 8 (1997): 2033. http://dx.doi.org/10.2527/1997.7582033x.

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33

David, I., J. M. Astruc, G. Lagriffoul, E. Manfredi, C. Robert-Granié, and L. Bodin. "Genetic Correlation Between Female Fertility and Milk Yield in Lacaune Sheep." Journal of Dairy Science 91, no. 10 (October 2008): 4047–52. http://dx.doi.org/10.3168/jds.2008-1113.

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Nagy, By I., J. S, olkner, I. Komlosi, and L. Safar. "Genetic parameters of production and fertility traits in Hungarian Merino sheep." Journal of Animal Breeding and Genetics 116, no. 5 (October 1999): 399–413. http://dx.doi.org/10.1046/j.1439-0388.1999.00204.x.

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35

Nichols, J. E. "SOME OBSERVATIONS ON THE PROBLEM OF FERTILITY AND FECUNDITY IN SHEEP." Zeitschrift für Tierzüchtung und Züchtungsbiologie einschließlich Tierernährung 10, no. 2 (April 26, 2010): 225–334. http://dx.doi.org/10.1111/j.1439-0388.1927.tb00143.x.

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36

Pereira, R. M., P. Mesquita, M. Batista, M. C. Baptista, J. P. Barbas, J. Pimenta, I. C. Santos, et al. "Doppel gene polymorphisms in Portuguese sheep breeds: Insights on ram fertility." Animal Reproduction Science 114, no. 1-3 (August 2009): 157–66. http://dx.doi.org/10.1016/j.anireprosci.2008.10.003.

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37

Babochkin, Peter Sergeevich, and Margarita Vasilyevna Zabelina. "Features of formation of the lethal qualities of the young sheep edilbaevskoy depending on the milk yield of their mothers." Agrarian Scientific Journal, no. 6 (June 18, 2019): 43–45. http://dx.doi.org/10.28983/asj.y2019i6pp43-45.

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The article presents the fertility of the Queens, the safety of young animals, slaughter indicators of young sheep of the edilbaev breed, obtained from ewes with different levels of productivity.

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Ghoreishi, Hourad, Sadegh Fathi-Yosefabad, Jalal Shayegh, and Abolfazl Barzegari. "Identification of mutations in <i>BMP15</i> and <i>GDF9</i> genes associated with prolificacy of Markhoz goats." Archives Animal Breeding 62, no. 2 (October 14, 2019): 565–70. http://dx.doi.org/10.5194/aab-62-565-2019.

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Abstract. The Markhoz is a local goat breed in the Kurdistan region of Iran. The mohair obtained from these animals plays an important cultural role and is used for making local clothes in the Kurdistan region. This breed is a low-fecundity local goat, and searching for genes associated with fertility of these goats is important for their breeding. Moreover, this research is complementary to prior studies of candidate genes associated with fertility. The growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15) are attractive candidates expressed by the oocyte and are as

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Abdel-Rahman, Salah, Yehia Mustafa, Hagar Errasool, Hanim Heikal, and Ayaat Elmaghraby. "FSHR (exon 10) gene polymorphisms and its association with fertility trait in Egyptian Ossimi sheep." Biotehnologija u stocarstvu 35, no. 2 (2019): 127–40. http://dx.doi.org/10.2298/bah1902127a.

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For the association between of Follicle stimulating hormone receptor (FSHR) gene (partial part of exon 10) polymorphisms and litter size trait in Egyptian Ossimi sheep, polymerase chain reaction-single stranded conformational polymorphism (PCR-SSCP) and DNA sequencing techniques were developed. Fifty female Ossimi sheep reared under Egyptian conditions were selected according to their litter size. DNA from blood samples of these animals was isolated to amplify 250-bp of the FSHR gene influencing litter size production trait in sheep. Based on litter size, 50 animals were selected from the high

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Waghorn, G. C., I. D. Shelton, and W. C. McNabb. "Effects of condensed tannins in Lotus pedunculatus on its nutritive value for sheep. 1. Non-nitrogenous aspects." Journal of Agricultural Science 123, no. 1 (August 1994): 99–107. http://dx.doi.org/10.1017/s0021859600067824.

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SummaryLotus pedunculatus was grown under high fertility conditions and its nutritive value was determined in a feeding trial with sheep at Palmerston North, New Zealand in 1989. The condensed tannins (CT) accounted for 5·5 % of lotus dry matter (DM) and its effect on digestion was evaluated by giving an intraruminal infusion of polyethylene glycol (PEG) to six of the sheep (PEG group). PEG preferentially binds with CT so that the lotus becomes essentially CT-free.The experiment was carried out with 14 sheep (six PEG and eight ‘Tannin’) held in metabolism crates indoors and given freshly cut l

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Z, Hernández-Russo. "Effect of Gastrointestinal Nematodes on Reproduction and Lamb Growth in Australian Merino Sheep." Open Access Journal of Veterinary Science & Research 5, no. 2 (2020): 1–5. http://dx.doi.org/10.23880/oajvsr-16000204.

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Environmental conditions in Uruguay favour the development of gastrointestinal nematodes (GIN) throughout the year, with clinical or subclinical manifestations that cause significant economic losses. The aim of this study was to evaluate the effect of the GIN on fertility, fecundity, reproductive rate and lamb growth in Australian Merino sheep grazing on basalt fields. The study was carried out in a farm located in north of Uruguay. Sixty-eight Merino ewes facing a natural parasite challenge were divided into two groups. Control group was doused with active anthelmintic that have proven effica

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Al-Mutar, H., L. Younis, and H. Khawla. "Effect of the Point Mutation in Growth Differentiation Factor 9 Gene in Awassi Sheep Oocytes on Sterility and Fertility." Journal of Pure and Applied Microbiology 12, no. 4 (December 30, 2018): 2095–102. http://dx.doi.org/10.22207/jpam.12.4.46.

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David, I., P. Kohnke, J. Fehrenbach, A. R. Lopes Simoes, E. Debreuve, X. Descombes, F. Plouraboue, P. Degond, and X. Druart. "New objective measurements of semen wave motion are associated with fertility in sheep." Reproduction, Fertility and Development 30, no. 6 (2018): 889. http://dx.doi.org/10.1071/rd17472.

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In sheep, wave motion in semen is currently used by AI centres to select ejaculates for insemination. Despite its low cost, convenience and established ability to predict fertility, the subjectivity of this assessment is a limiting factor for its applicability. The aims of the present study were to establish an objective method for the analysis of wave motion and to assess the associations of objective parameters with fertility after cervical insemination. Collective sperm motion in undiluted semen was observed by phase contrast microscopy at low magnification in a 100-µm deep glass chamber. I

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Kulikova, A. Ya. "Genetic potential of the gene pool of sheep of the Kuban breeding type of the Lincoln breed and methods of its conservation." Veterinariya, Zootekhniya i Biotekhnologiya 1, no. 8 (2020): 18–25. http://dx.doi.org/10.36871/vet.zoo.bio.202008003.

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The use of a rotational scheme for sheep selection in purebred breeding in a closed population ensured the maintenance of a high level of productivity of long-wooled sheep and their advantage in live weight by 24,0–27,0%, fertility by 20,8%, and maturation from 15,1 to 18,3%, wool productivity – up to 36%, compared with the requirements for the breed, as well as flock replacement due to its own reproduction without expensive import of paternal breeds.

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Constantinou, A. "RUMINANT LIVESTOCK GENETIC RESOURCES IN CYPRUS." Animal Genetic Resources Information 4 (April 1985): 1–8. http://dx.doi.org/10.1017/s1014233900000134.

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SUMMARYFriesian cattle, Chios sheep and Damascus goats have become dominant livestock breeds in Cyprus. Chios sheep were found to be superior to the indigenous Cyprus FatTailed and the imported Awassi with respect to precocity, fertility and prolificacy. Awassi performed very well with regard to milk yield and lamb viability. Crossbreds were more or less intermediate. Crosses of Chios with Cyprus Fat-Tailed have contributed substantially to the improvement of milk and meat production from sheep in the country.Damascus goats are very good in litter size and milk yield; a specific strain of the

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Nemati, Z., and A. Barzegari. "Study of the bone morphogenetic protein 15 (BMp15) mutation in Moghani sheep using RFLP method." Proceedings of the British Society of Animal Science 2009 (April 2009): 181. http://dx.doi.org/10.1017/s1752756200030209.

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The Moghani is the main fat-tailed type of sheep in north-west of Iran and north-east of Turkey, where it is raised for meat, milk and carpet wool. In sheep, a wide range in litter size has been observed among different breeds and within breeds. Several genes have been recently identified that affect female fecundity in domesticated sheep such as BMP15 gene which encodes bone morphogenic protein 15 (Davis 2005 and Hanrahan et al,. 2004) and is a member of the transforming growth factor b (TGFb) super family (Galloway et al, 2000). The identification of the BMP15 mutation is important for the s

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Silva, Reanne Moraes Meira da, Juliana Targino Silva Almeida e Macêdo, and Pedro Miguel Ocampos Pedroso. "Uterine segmental aplasia in sheep." Acta Veterinaria Brasilica 15, no. 2 (July 6, 2021): 93–95. http://dx.doi.org/10.21708/avb.2021.15.2.9376.

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The complete absence of one of the uterine horns, named segmental uterine aplasia or unicorn uterus, occurs due to deficiency in the development of segments of the paramesonephric or Mullerian ducts. It is a congenital or hereditary anomaly of the female reproductive tract caused by recessive genes, which occurrence is unusual. In cows, this malformation was initially called “white heifer disease”, comprising an alteration in the Mullerian ducts in association with the white skin gene that causes aplasia of the uterus, cervix and vagina. Two pieces of sheep reproductive system from a slaughter

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Mossa, F., F. Jimenez-Krassel, D. Scheetz, M. Weber-Nielsen, A. C. O. Evans, and J. J. Ireland. "Anti-Müllerian Hormone (AMH) and fertility management in agricultural species." Reproduction 154, no. 1 (July 2017): R1—R11. http://dx.doi.org/10.1530/rep-17-0104.

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A reliable, easy to assess marker for fertility in agricultural species would be highly desirable and Anti-Müllerian Hormone (AMH) is a promising candidate. This review summarizes recent findings concerning AMH and its role in fertility management, mainly in cattle. It focuses on (1) alterations in circulating AMH concentrations from birth to puberty and during estrous cycles; (2) correlation of circulating AMH concentrations with ovarian follicle numbers and ovarian reserve; (3) factors that impact circulating AMH concentrations; (4) use of AMH as a predictor of fertility. Circulating AMH con

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BOJAR, WIKTOR, ANDRZEJ JUNKUSZEW, and MONIKA OLECH. "Influence of SRLV infections in sheep flocks on growth and reproductive performance." Medycyna Weterynaryjna 74, no. 8 (2018): 540–43. http://dx.doi.org/10.21521/mw.6098.

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The aim of the study was to determine the influence of the occurrence of SRLV infections on lamb growth and reproductive performance of sheep. The study was carried out on 98 sheep flocks from mid-Eastern Poland, covering the area of Lubelskie, Świętokrzyskie and Podkarpackie provinces. The study included 6,470 mother ewes. Flocks with at least one detected case of SRLV-positive serological test were considered infected. All flocks included in the experiment were subjected to the analysis of lamb growth on the basis of their body weight achieved on the 56th day of life. Moreover, traits relate

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Stankov, K. "Еconomic efficiency of local, merino and meat-type sheep breeds raised in Bulgaria without milking". Agricultural Science and Technology 12, № 1 (березень 2020): 37–41. http://dx.doi.org/10.15547/ast.2020.01.007.

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Abstract. The goal of the present study is to perform an economic assessment of the local (autochthonic), merino and meat-type sheep breeds raised in Bulgaria without milking and under the conditions of a market economy and free commerce. We studied sheep from three herds, of the Srednostaroplaninska breed, Northeast Bulgarian Merino breed (NEBM) and the Île-de-France breed. The sheep from all three herds were under selection control. The results of the study indicated low economic effects for all three herds. Without subsidies, the local and merino breeds finished with negative values for pr

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