Genetics of Reproduction in Sheep PDF Download
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Author: R.B. Land
Publisher: Elsevier
ISBN: 1483161730
Category : Technology & Engineering
Languages : en
Pages : 440
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Book Description
Genetics of Reproduction in Sheep is a compilation of papers that are concerned with the study and application of genetics to the reproduction in sheep. The book is divided into six parts, grouping the papers according to topic. The main topics include genetic variation and selection; the inheritance and the effects of the Booroola gene; genetic strategies for single genes; physiology of genetic variation; the physiological criteria of genetic merit; and the national requirement and systems of husbandry. The text is recommended for those involved with raising sheep and plan to apply genetics in their reproduction, as well as for geneticists who wish to conduct studies on how their field is applied to sheep reproduction.
Author: R.B. Land
Publisher: Elsevier
ISBN: 1483161730
Category : Technology & Engineering
Languages : en
Pages : 440
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Book Description
Genetics of Reproduction in Sheep is a compilation of papers that are concerned with the study and application of genetics to the reproduction in sheep. The book is divided into six parts, grouping the papers according to topic. The main topics include genetic variation and selection; the inheritance and the effects of the Booroola gene; genetic strategies for single genes; physiology of genetic variation; the physiological criteria of genetic merit; and the national requirement and systems of husbandry. The text is recommended for those involved with raising sheep and plan to apply genetics in their reproduction, as well as for geneticists who wish to conduct studies on how their field is applied to sheep reproduction.
Author: Roman L. Hruska U.S. Meat Animal Research Center
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 48
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Book Description
Author: J. Evans
Publisher: Springer Science & Business Media
ISBN: 1468451103
Category : Medical
Languages : en
Pages : 320
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Book Description
J. Warren Evans Department of Animal Science Texas A&M University College Station, Texas 77843 In the near future, improvement of domestic animals for the production of food and fiber is poised to undergo a revolution by the utilization of recent breakthroughs and advances in molecular genetics, embryo manipula tions, and gene transfer systems. Utilization of these techniques will have a wide impact on animal agriculture by improvement of production effi ciency via manipulation and control of many physiological systems. The end result will be to decrease production costs, increase food production and quality, and lower food costs. Health and well being of domestic and other animals will be improved as a result of new methods of disease diagnosis, vaccine production, and disease prevention practices. Genetic engineering also offers the possibility of utilizing animals for the development of pharmaceutical products to benefit society. Research progress will be en hanced via manipulation of the gene pool. The objectives of this Conference were to discuss the current status of animal bioengineering and to realistically assess the potential applica tions of current and future genetic technologies for the production of food and fiber to meet the needs of our hungry world, and to provide animal sci entists who may wish to utilize bioengineering in current or future re search programs with current background information regarding concepts, ap plications, and methodologies.
Author: Manuel Gonzalez Ronquillo
Publisher: BoD – Books on Demand
ISBN: 1839697105
Category : Medical
Languages : en
Pages : 179
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Book Description
This book provides an overview of sheep husbandry in different parts of the world, including information on production and management systems, reproduction, and animal health. Chapters discuss different types of sheep and sheep husbandry in Poland, India, Africa, Spain, and North America, as well as zoonotic diseases such as cryptosporidiosis and their adverse impacts on the economics of sheep herding. This book is a useful resource for producers, veterinarians, animal scientists, researchers, biologists, students, and other interested readers.
Author: Rebecca Krisher
Publisher: John Wiley & Sons
ISBN: 1118522168
Category : Science
Languages : en
Pages : 260
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Book Description
Oocyte Physiology and Development in Domestic Animals reviews the most recent advances in the research of physiological and biochemical mechanisms underlying oocyte growth and development, providing readers with the fundamental understanding of these key processes and summarizing this important field of research. The book covers multiple molecular and physiological mechanisms including initiation of oocyte growth during folliculogenesis and in vitro follicle culture to support oocyte competence, that are critical to health and quality. Physiological process ranging from gene expression to metabolism will be covered with an eye toward using these factors to uncover biomarkers that will further advance the field. In addition, the text looks at the effects of in vitro maturation environments on oocyte quality and developmental outcome.
Author: Frank H Baker
Publisher: CRC Press
ISBN: 1000239535
Category : Science
Languages : en
Pages : 609
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Book Description
The Sheep and Goat Handbook includes presentations made at the International Stockrnen 's School, January 2-6, 1983. The faculty members of the School who authored this third volume of the Handbook, along with books on Beef Cattle, Dairy Cattle, and Horses, are scholars, stockrnen, and agribusiness leaders with national and international reputations. The papers are a mixture of tried and true technology and practices with new concepts from the latest research results of experiments in all parts of the world. Relevant information and concepts from many related disciplines are included.
Author: Anna Al Baqain
Publisher: Cuvillier Verlag
ISBN: 3736941552
Category : Science
Languages : en
Pages : 167
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Book Description
Summary In Israel, more than half of the national sheep flock is kept by Bedouin in the Negev desert. Extensive production systems co-exist besides semi-intensive systems with varying economic success. There is a constant regional demand for sheep meat, but the local supply is not able to cover it. The wide gap between the performance potential of the commonly used and environmentally adapted local Awassi and improved sheep breeds suggests an increase in economic efficiency by intensification of breeding. The choice of a suitable breed for a specific system is seen as key factor for the farm success and requires the knowledge of the animals’ adaptation. Information on the performance of Bedouin sheep flocks under the given harsh production conditions are, however, missing. The purpose of the study was thus a characterization of current production systems, the assessment of the aggregated performance of the different Awassi lines kept in those systems and the impact of socio-economic and production factors on the efficiency of Bedouin sheep production. Also breeding objectives of Bedouin sheep farmers were investigated. The role of new breeding technologies in the ongoing process of intensification of sheep farming systems was analyzed and discussed. Data collection was step-wise with repeated field surveys from January 2007 till March 2009, lasting 6 months altogether. In a first diagnostic survey 30 Bedouin households in the Negev desert, located in two different climatic zones, arid and semi-arid, and keeping a minimum flock size of 50 animals, were visited. Households were grouped into 4 tribe groups according to location and ethnical background. In a second step, 21 households of the previous sample were visited again and grouped according to the breed composition of their flocks and by their use of hormonal synchronization and/or artificial insemination. Semi-structured interviews and participative observation yielded information about the socio-economic situation of the household, function of flocks, the livestock husbandry, sheep management and production. Sheep market surveys, key person interviews and secondary data were used for verification of data. Detailed information on sheep was obtained through on-farm performance recording run in 16 sheep farms, including a total of 2420 breeding ewes. Sheep of different Improved Awassi lines were present in those experimental flocks, including the Afec Awassi, carrying the Booroola gene (BB/B+), which has a major impact on prolificacy, and the Assaf breed. In a last step, 56 sheep farmers from different parts of the Negev were asked about their selection criteria for replacement. Trait preferences were derived by a consecutive ranking technique. The data analysis incorporated descriptive statistics, general linear models and non-parametric tests performed with SAS 9.1 and SAS 9.2 software. The diagnostic survey revealed that functions of sheep flocks differed significantly between tribes: in the semi-arid area with a main focus on generating income, and in tribes of the arid zone with a higher importance of subsistence related and social purposes. The primary purpose was meat production. The dual purpose of meat and milk was still found in 57% of the farms, yet only 13% of the farms were selling milk products. The missing market access was the main reason for a strong decline in the use of milk, wool and manure during the last decade. Lamb meat, providing the main output of all farms, ranged from 13 to 58 kg of marketable live weight per ewe and year (LME). Classified according to their LME, 30% of the investigated farms followed an extensive, 47% a semi-extensive and 23% a semi-intensive management. Significant differences in meat output were found for the factors tribe group, breed composition of flocks and selling age of lambs. The gross margin per ewe and year varied between -27 € and 54 € and the net benefit per flock and year (NB) between -7,020 € and 20,993 €. Both economic parameters were positively related to the meat output. Negative NB’s were realized by 43% of the farms, belonging foremost to traditional Bedouin tribes, oriented towards subsistence and living in remote areas. Only 27% of economically successful farms generated an income comparable to that of a part-time off-farm job. These farmers regularly used veterinary services to introduce improved breeds and modern breeding technology. Their good market access facilitated a strong market-oriented production, integrating lamb fattening, which had the highest impact on the production success. During the two years of research a severe drought occurred in the study region, causing a decline in LME, due to lower lambing rates and higher mortalities. To adapt to changing conditions, farms keeping the pure local Awassi breed reduced their flock sizes stronger than farms keeping also crossbreds. Consequently, the LME and the NB decreased stronger in flocks of pure local Awassi, compared to flocks with crossbreds. The decline in the NB was 14 times lower in flocks with use of hormonal synchronization and/or artificial insemination than in flocks with the local breed kept under traditional management. The lowest decline in the NB and the benefit cost ratio (BCR) were found in flocks with more than 50% crossbreds. Yet, a high variation in performance among flocks with different degrees of crossbreeding was detected. Data analysis of flocks with permanent performance recording revealed that prolificacy was significantly affected by breed, besides farm and parity. Afec Awassi (B+) ewes had a significantly (p
Author: Gerald Litwack
Publisher: Academic Press
ISBN: 0128143606
Category : Science
Languages : en
Pages : 552
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Book Description
Ovarian Cycle, Volume 107, the latest in the Vitamins and Hormones series first published in 1943, and the longest-running serial published by Academic Press, covers the latest updates on hormone action, vitamin action, X-ray crystal structure, physiology and enzyme mechanisms. This latest release includes an overview of the ovarian cycle, a section on ovarian hyperstimulation syndrome, information on androgens and ovarian follicular maturation, information on peptide inhibitors of human thymidylate synthase to inhibit ovarian cancer cell growth, sections on nodal and luteolysis, neurokinins, dynorphin and pulsatile Lh secretion, Lh receptor expression by Mir12, and gonadotrophin-surge attenuating factor, melatonin and Bmp-6 regulation, amongst other topics. - Focuses on the newest aspects of hormone action in connection with diseases - Lays the groundwork for the focus of new chemotherapeutic targets - Reviews emerging areas in hormone action, cellular regulators and signaling pathways
Author: Harinder P.S. Makkar
Publisher: Springer Science & Business Media
ISBN: 1402033117
Category : Science
Languages : en
Pages : 787
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Book Description
Modern Biotechnology has potential for solving many problems associated with animal productivity and health and offers exciting opportunities for enhancing agricultural productivity. At present the focus is, however, on the issues and problems of significance for livestock producers in the developed world. In order to fully realize the benefits of this technology in developing countries, there is a need to identify, characterize and apply appropriate gene-based technologies for these regions. These proceedings present peer reviewed state-of-the-art papers describing the achievements in the areas of animal breeding and genetics, animal nutrition, animal health, and environment, ethics, safety, and regulatory aspects of gene-based technologies; achievements which could be realized using these modern scientific tools to maximise the benefits from the 'livestock revolution' that is taking place; and the constraints in the use of gene-based technologies and their specific research needs. This book will help in bridging the wide gap between developed and developing countries, in the development and use of gene-based technologies, and to elucidate the current and future roles of such technologies in the developing world. It is a good reference source for researchers, students and policy-makers alike.
Author: I. Fayez M. Marai
Publisher: Butterworth-Heinemann
ISBN: 1483162176
Category : Technology & Engineering
Languages : en
Pages : 303
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Book Description
New Techniques in Sheep Production is an eight-part book that first reviews sheep production systems and scope for improvement. Subsequent chapter focuses on methods of increasing fecundity. Parts III and IV describe reproduction methods and genetic improvement techniques. Other chapters discuss breed development; feeding systems; management and health control; and evaluation of techniques in sheep production. This book will be of value to the pioneer farmers, their advisers, and supporters in the associated marketing and supply organizations, as well as to students at agriculture and veterinary universities and colleges.
