Download or read book Genetic Analysis of Lactation Persistency and Its Association with Genetic Variants of Bovine Growth Hormone Gene in Sahiwal Cattle written by Shweta Sachan and published by . This book was released on 2018 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lactation Persistency and Its Association with Genetic Variants of Bovine Growth Hormone Gene written by and published by . This book was released on 2021 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification of Genetic Variants of OPN PPARGC1A Genes and Their Association with Milk Production Traits in Sahiwal Cattle written by Suchit Kumar and published by . This book was released on 2018 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Bovine Somatotropin Gene in Sahiwal Cattle written by V. Srinivasa Raghavaqn and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional and Genetic Characterisation of Major Effect Milk Composition Variants in Dairy Cattle written by Tania Alice Fink and published by . This book was released on 2017 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine milk production and composition traits are complex quantitative phenotypes, reflecting the interplay of many environmental and genetic factors influencing mammary and lactation biology. Despite a largely quantitative architecture, genetic mapping studies have identified a handful of major effect loci in dairy cattle, each containing a large number of trait-associated sequence variants. Identifying the specific variant causally responsible at these genetic signals requires extensive experimental follow-up, where many of the genomic regions implicate present no obvious candidate mutations. The association signal is instead represented by many non-coding variants that are difficult to functionally prioritise. The aim of the research described in this thesis was to investigate four such loci segregating in NZ dairy cattle, aiming to mechanistically link causative genes and variants to the milk production and composition effects. The results of this thesis describe the identification of expression quantitative trait loci at each of the four major associated regions, providing evidence that the variants responsible exert their phenotypic influence through the modulation of mammary gene expression. Further genetic and functional experiments were conducted to elucidate the mechanism by which the implicated variants impact gene expression. Highlights of this work include the demonstration of a new mechanism of effect for the largest and most highly cited causal mutation in the bovine literature. This work also reports the discovery of major milk production effects for a mutation previously only implicated in bovine growth and stature. This thesis also reports the development and optimisation of CRISPR-Cas9 mediated genome editing as a method for testing the function of regulatory variants directly. By presenting an efficient in vitro engineering approach in mammary cells, the work creates a framework to genetically isolate candidate variants, creating opportunities to study the major effect variants reported in this thesis, and investigate other as yet undefined milk composition loci. Taken together, the work presented in this thesis provides enhanced understanding of the mechanisms linking major effect genetic variants to bovine milk production and composition, and raises the profile of these and other variants as markers to incorporate in animal selection and breeding strategies.
Download or read book Identification of Genetic Variants of BGH GHR and IGF1 Gene and Their Association with Lactation Persistency in Tharparkar Cattle written by Linda George and published by . This book was released on 2019 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Variants in FAM19A1 KCNB1 and EDN3 Gene and Their Association with Udder Type Traits Clinical Mastitis and Milk Production in Karan Fries and Sahiwal Cattle written by Ragini Kumari and published by . This book was released on 2019 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Daily Milk Yield Variability in Holstein Dairy Cattle written by Victoria Moncur and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increased availability of daily milk yield measurements, data exists for analyses of additional traits that could be related to health and fertility. The objective of this thesis was to determine if day-to-day variation in milk yield is heritable, how it is correlated with daily milk yield (dMY), and how it is correlated with commonly measured production, health, and fertility traits. 789,266 dMY records were retrieved from 5 to 305 days in milk (DIM) for 2,366 lactations among 1,184 Holsteins. dMY was merged with the previous days milk yield (pMY) to derive the absolute value of dMY - pMY (ABS), and relative change in milk yield (REL), which was ABS/pMY. The average REL, ABS and dMY for four lactation segments were calculated and included in a series of single-step genomic evaluations in ASReml. Three-trait models with lactation segments of 5 to 50 DIM, 51 to 100 DIM, and 101 to 200 DIM were fit separately for dMY, ABS, and REL; this was followed by a series of two-trait models of DIM 5 to 200 with one of 5 to 50 DIM, 51 to 100 DIM, or 101 to 200 DIM for dMY, ABS, and REL. Finally, a three-trait model of dMY, ABS, and REL from 5 to 200 DIM was fit. The fixed effects included lactation group (lactations 1, 2, 3), age at calving, and year-season of calving while the random effects included the genomic relationship effect, permanent environment, and residual error. The genomic relationship matrix was generated with PREGSF90 and included 7007 animals of which 516 had 40K SNP genotypes and phenotypic records. Genomic estimated breeding values (gEBV) for dMY, ABS, and REL from 642 cows with genotypes were merged with their official genomic predicted transmitting abilities (gPTA) for several traits from Council on Dairy Cattle Breeding national genetic evaluations. All traits were heritable across all segments with dMY generally having the highest heritability (23% for 5 to 200 DIM) and REL having the lowest (16% for 5 to 200 DIM). Genetic correlations within trait indicated that variable milk yield in early lactation was strongly correlated with variable day-to-day yield for the remainder of lactation. Variation defined as ABS was strongly correlated with both dMY (0.73 from 5 to 200 DIM) and REL (0.62 from 5 to 200 DIM), where dMY and REL were independent (-0.08 from 5 to 200 DIM). Higher gEBV for dMY, ABS, or REL was unfavorably correlated with gPTA for health and fertility traits such as daughter pregnancy rate or somatic cell score. In conclusion, daily milk yield variability was heritable, and REL was more independent of milk yield than ABS. Milk yield variability was also associated with unfavorable health and fertility outcomes. Genome wide association analysis suggests that milk yield variability is largely polygenic but with some influence from major genes.
Download or read book Genetic Variants of SFXN1 ANKRD31 and WDR41 Genes Their Association with Udder Type Traits Milk Production and Clinical Mastitis in Karan Fries and Sahiwal Cows written by Nisha Sharma and published by . This book was released on 2019 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1991-07 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cattle Breeds written by Marleen Felius and published by . This book was released on 2007-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 1,000 cattle breeds from around the globe are cataloged in this monumental bovine reference. Each breed, including species found only in prehistory, is provided with a detailed physical description and a watercolor drawn to scale. Cattle are also classified into groups and subgroups according to geographical distribution, historical background, and physical features. Charts indicating breed lineage and records of crossbreeding, maps clearly depicting the location and distribution of authentic and derived breeds, and additional color photographs all round out this unprecedented resource.
Download or read book Agrindex written by and published by . This book was released on 1993 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mitigation of Greenhouse Gas Emissions in Livestock Production written by Pierre J. Gerber and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2013 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current analysis was conducted to evaluate the potential of nutritional, manure and animal husbandry practices for mitigating methane (CH4) and nitrous oxide (N2O) - i.e. non-carbon dioxide (CO2) - GHG emissions from livestock production. These practices were categorized into enteric CH4, manure management and animal husbandry mitigation practices. Emphasis was placed on enteric CH4 mitigation practices for ruminant animals (only in vivo studies were considered) and manure mitigation practices for both ruminant and monogastric species. Over 900 references were reviewed; simulation and life cycle assessment analyses were generally excluded
Download or read book Heat Stress and Animal Productivity written by Anjali Aggarwal and published by Springer Science & Business Media. This book was released on 2012-12-30 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Anjali Aggarwal is working as a Senior Scientist at National Dairy Research Institute, Karnal (India). She holds a PhD degree in Animal Physiology and is involved in research and teaching at post-graduate level. Her area of research work is stress and environmental physiology. She has more than 50 publications, two technical bulletins, four manuals and many book chapters to her credit. She has successfully guided many post-graduate and PhD students. Her major research accomplishments are on microclimatic modification for alleviation of heat and cold stress, mist and fan cooling systems for cows and buffaloes, and use of wallowing tank in buffaloes. Her work involves the use of technology of supplementing micronutrients during dry period and early lactation to crossbred and indigenous cows for alleviating metabolic and oxidative stress and improved health and productivity. Studies are also done in her lab on partitioning of heat loss from skin and pulmonary system of cattle and buffaloes as a result of exercise or exposure to heat stress. Dr. R.C. Upadhyay is working as Head, Dairy Cattle Physiology Division at National Dairy Research Institute, Karnal (India). He graduated in Veterinary Sciences and obtained his PhD degree in Animal Physiology. His area of recent research is climate change, stress, and environmental physiology. His major research accomplishment is on climate change impact assessment of milk production and growth in livestock. His work also involves studying methane conversion and emission factors for Indian livestock and use of IPCC methodology of methane inventory of Indian livestock. Heat shock protein-70 expression studies in cattle and buffaloes are also done in his lab. Draught animal power evaluation, fatigue assessment, work-rest cycle and work limiting factors form the highlights of his work. Studies on partitioning of heat loss from skin and pulmonary system of cattle and buffaloes and electrocardiographic studies in cattle, buffalo, sheep and goat are also undertaken in his lab. He has more than 75 research papers, four books and several book chapters to his credit. Technologies developed and research done by him include methodology of methane measurement: open and closed circuit for cattle and buffaloes; inventory of methane emission from livestock using IPCC methodology; livestock stress index: thermal stress measurement based on physiological functions; and draught power evaluation system and large animal treadmill system. He received training in Radio-nuclides in medicine at Australian School of Nuclear Technology, Lucas heights, NSW, Australia in 1985 and Use of radioisotopes in cardiovascular investigations at CSIRO, Prospect, NSW, Australia, during 1985-86. He has guided several post-graduate and PhD students. He is recipient of Hari Om Ashram Award-1990 (ICAR) for outstanding research in animal sciences.
Download or read book Bovine Medicine written by Anthony H. Andrews and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 1233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Medicine provides practical and comprehensive information oncattle disease and production and is a key reference for all largeanimal vets. Since the first edition was published in 1991 therehave been significant improvements in disease control andmanagement of cattle. Almost all parts of the book have beenupdated and completely rewritten. There are new chapters onsurgery, embryo transfer, artificial insemination, ethno-veterinarymedicine and biosecurity, and a new consolidating chapter on theinteraction between the animal, environment, management anddisease. The previous edition has sold all over the world, and as aresult of this a greater emphasis has been placed on conditions andtheir treatment in areas other than temperate regions. A newsection entitled "Global Variation in Cattle Practice" has beenincluded with contributors discussing bovine medicine practice intheir part of the world. All in all this is an outstanding resource for any practisingvet and an excellent reference for veterinary students.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1978 with total page 1276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linear Models for the Prediction of Animal Breeding Values written by R. A. Mrode and published by Cab International. This book was released on 2014 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of producing desirable traits in offspring such as increased growth rate or superior meat, milk and wool production is a vital economic tool to the animal scientist. Summarizing the latest developments in genomics relating to animal breeding values and design of breeding programs, this new edition includes models of survival analysis, social interaction and sire and dam models, as well as advancements in the use of SNPs in the computation of genomic breeding values.
