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Association Studies For Time Dependent Genetic Effects On Milk Production Traits In Holstein Friesian Dairy Cattle
Download Association Studies For Time Dependent Genetic Effects On Milk Production Traits In Holstein Friesian Dairy Cattle full books in PDF, epub, and Kindle. Read online Association Studies For Time Dependent Genetic Effects On Milk Production Traits In Holstein Friesian Dairy Cattle ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Association Studies for Time-dependent Genetic Effects on Milk Production Traits in Holstein Friesian Dairy Cattle by : Eva Maria Strucken
Download or read book Association Studies for Time-dependent Genetic Effects on Milk Production Traits in Holstein Friesian Dairy Cattle written by Eva Maria Strucken and published by . This book was released on 2012 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dairy Chemistry and Biochemistry by : P. F. Fox
Download or read book Dairy Chemistry and Biochemistry written by P. F. Fox and published by Springer. This book was released on 2015-06-19 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the most comprehensive introductory text on the chemistry and biochemistry of milk. It provides a comprehensive description of the principal constituents of milk (water, lipids, proteins, lactose, salts, vitamins, indigenous enzymes) and of the chemical aspects of cheese and fermented milks and of various dairy processing operations. It also covers heat-induced changes in milk, the use of exogenous enzymes in dairy processing, principal physical properties of milk, bioactive compounds in milk and comparison of milk of different species. This book is designed to meet the needs of senior students and dairy scientists in general.
Book Synopsis Genome-wide Interaction Analyses of Milk Production Traits in Dairy Cattle by :
Download or read book Genome-wide Interaction Analyses of Milk Production Traits in Dairy Cattle written by and published by . This book was released on 2020 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is substantial evidence that the genetic background of milk production traits changes during lactation. It is known that the genetic variances for several milk production traits change during lactation and genetic correlations between milk production traits at different lactation stages differ from unity. In addition, for the diacylglycerol O-acyltransferase 1 (DGAT1) K232A polymorphism it has been shown that its effects on milk production traits are not constant during lactation. However, most genome-wide association studies (GWAS) for milk production traits do not account for changes in genetic effects during lactation. Therefore, these GWAS might miss QTL whose effects change during lactation. The objective of this thesis was to scan the whole genome for QTL whose effects on milk production traits change during lactation. First, 4 different GWAS approaches were performed to detect QTL with changing effects on protein content during lactation including an alternative approach; GWAS for genotype by lactation stage interaction. Results showed that the GWAS for genotype by lactation stage interaction identified significant regions that were not detected in GWAS assuming constant SNP effects during lactation. The GWAS for genotype by lactation stage interaction were performed for 7 other milk production traits. In total 7 genomic regions whose effects change during lactation exhibited significant genotype by lactation stage interaction effects. Therefore, GWAS for genotype by lactation stage interaction offered new possibilities to unravel the changes in genetic background of milk production traits. Changes in genetic effects in early lactation might be related to negative energy balance. Effects of pregnancy might cause changes in late lactation. Possible effects of pregnancy were further investigated by studying genotype by pregnancy interaction. Interestingly, the effects of pregnancy on milk production traits differed for DGAT1 genotypes. Finally, GWAS for genotype by season interaction were performed and identified major interaction signals on chromosomes 3 and 14 (DGAT1).
Book Synopsis Genotype by Environment Interaction in Milk Production and Reproductive Traits Among Holstein Cows Producing in Mexico and the US Environments by : Eugenia Cienfuegos
Download or read book Genotype by Environment Interaction in Milk Production and Reproductive Traits Among Holstein Cows Producing in Mexico and the US Environments written by Eugenia Cienfuegos and published by . This book was released on 1998 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimates of Genetic and Phenotypic Parameters for Some Productive Characteristics of Holstein-Friesian Cattle by : Leo Rudolph Hansen
Download or read book Estimates of Genetic and Phenotypic Parameters for Some Productive Characteristics of Holstein-Friesian Cattle written by Leo Rudolph Hansen and published by . This book was released on 1964 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proteomics in Domestic Animals: from Farm to Systems Biology by : Andre Martinho de Almeida
Download or read book Proteomics in Domestic Animals: from Farm to Systems Biology written by Andre Martinho de Almeida and published by Springer. This book was released on 2018-02-09 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proteomics, like other post-genomics tools, has been growing at a rapid pace and has important applications in numerous fields of science. While its use in animal and veterinary sciences is still limited, there have been considerable advances in this field in recent years, in areas as diverse as physiology, nutrition and food of animal origin processing. This is mainly as a consequence of a wider availability and better understanding of proteomics methodologies by animal and veterinary researchers. This book provides a comprehensive, state-of-the-art account of the status of farm-animal proteomics research, focusing on the principles behind proteomics methodologies and its specific applications and offering clear example.
Book Synopsis Advances in Breeding of Dairy Cattle by : Julius Van der Werf
Download or read book Advances in Breeding of Dairy Cattle written by Julius Van der Werf and published by . This book was released on 2019 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Research Council (U.S.). Committee on Physiological Effects of Environmental Factors on Animals Publisher :National Academies ISBN 13 : Total Pages :390 pages Book Rating :4.1/5 (312 download)
Book Synopsis A Guide to Environmental Research on Animals by : National Research Council (U.S.). Committee on Physiological Effects of Environmental Factors on Animals
Download or read book A Guide to Environmental Research on Animals written by National Research Council (U.S.). Committee on Physiological Effects of Environmental Factors on Animals and published by National Academies. This book was released on 1971-01-01 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioclimatic factors and their measurement. Physiologic functions and measurement techniques. Animal characteristics in relation to environmental response. Environment and physiopathology. Design and execution of experiments using domestic animals. Development of research facilities. Research under field conditions.
Book Synopsis The Genetics of Cattle, 2nd Edition by : Dorian Garrick
Download or read book The Genetics of Cattle, 2nd Edition written by Dorian Garrick and published by CABI. This book was released on 2014-11-28 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the time of domestication more than 10,000 years ago, cattle have played an increasingly crucial role in the development of human civilizations. Progress has been quite remarkable since the turn of the century; the sequencing of the bovine genome in 2009 launched new avenues for furthering our understanding of theoretical and practical aspects of cattle genetics. Covering a vast array of questions, this book reviews major topics from molecular and developmental genetics, disease resistance and immunogenetics to genetic improvement of dairy and beef breeds, addressing all current problems in the field. This second edition includes a new team of authors and completely new chapters on the genetics of fat production, nutrition, feed intake and efficiency, growth and body composition. Fully updated throughout, it provides a valuable resource on cattle genetics for researchers, breeders, veterinarians and postgraduate students.
Book Synopsis Additive and Nonadditive Genetic Effects on Growth and Milk Production Traits in Holstein Ayrshire Crossbreeding Experimental Data by : Daniel Perotto
Download or read book Additive and Nonadditive Genetic Effects on Growth and Milk Production Traits in Holstein Ayrshire Crossbreeding Experimental Data written by Daniel Perotto and published by . This book was released on 1992 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Estimates of crossbreeding parameters from mixed-model analyses, were found to be more reliable than those from ordinary least squares analyses. (Abstract shortened by UMI.)" --
Book Synopsis Genomic Characterisation and Polymorphism Analysis of Candidate Genes for Milk Production Traits and Association Studies in Three Cattle Breeds by :
Download or read book Genomic Characterisation and Polymorphism Analysis of Candidate Genes for Milk Production Traits and Association Studies in Three Cattle Breeds written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past decades, various mapping experiments resulted in the detection of several markers affecting milk production traits on bovine chromosome 6. The aim of this study was to identify causative polymorphisms of milk traits using a multiple breed approach. Six selected candidate genes on chromosome 6 in cattle were characterised and screened for polymorphisms. Following this, 50 polymorphisms were genotyped in sires of German Brown, Fleckvieh and German Holstein for investigation in association studies with milk production traits. In particular, associated polymorphisms were obtained for fat- and protein yield. However, since polymorphisms were associated depending on breed, gene and trait under consideration, the causality of associated polymorphisms could not be confirmed.
Book Synopsis Linear Models for the Prediction of Animal Breeding Values by : R. A. Mrode
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.
Book Synopsis Issues in Animal Science and Research: 2013 Edition by :
Download or read book Issues in Animal Science and Research: 2013 Edition written by and published by ScholarlyEditions. This book was released on 2013-06-20 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Animal Science and Research / 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Rabbit Science. The editors have built Issues in Animal Science and Research: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Rabbit Science in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Animal Science and Research: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Book Synopsis Genomic Characterisation and Polymorphism Analysis of Candidate Genes for Milk Production Traits and Association Studies in Three Cattle Breeds by : Franz Reinhold Seefried
Download or read book Genomic Characterisation and Polymorphism Analysis of Candidate Genes for Milk Production Traits and Association Studies in Three Cattle Breeds written by Franz Reinhold Seefried and published by . This book was released on 2008 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Analysis of Daily Milk Yield Variability in Holstein Dairy Cattle by : Victoria Moncur
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.
Book Synopsis Genetic Relationships Between Milk Production and Type in Holstein-Friesian Dairy Cattle by : James Amon Grantham
Download or read book Genetic Relationships Between Milk Production and Type in Holstein-Friesian Dairy Cattle written by James Amon Grantham and published by . This book was released on 1973 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Herd Environment on the Genetic and Phenotypic Relationships Among Milk Yield, Fertility, and Somatic Cell Score in Holstein Cattle by : Hector Juarez Castillo
Download or read book Effect of Herd Environment on the Genetic and Phenotypic Relationships Among Milk Yield, Fertility, and Somatic Cell Score in Holstein Cattle written by Hector Juarez Castillo and published by . This book was released on 1998 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 248,230 first parity records of Holstein cows calving from 1987 to 1994, daughters of 588 sires in 3,042 herds were used to evaluate genotype by environment interactions in mature equivalent milk yield (MEM), lactation mean somatic cell score (LMSCS), and conception rate at first service (CRFS). Herds were classified into low and high management groups using three different criteria to differentiate production environments. Phenotypic means for MEM and body weight at first calving were greater in high than in low management herds, while low management herds had higher phenotypic means for LMSCS, CRFS, and age at first calving than high management herds. Genetic parameters were modeled using multiple trait linear models. For the complete data set heritability estimates for MEM, LMSCS, and CRFS, were 0.276, 0.103, and 0.015. Heritabilities and genetic and phenotypic correlations were consistent regardless of the environmental classification criteria. For low management herds, heritabilities for MEM, LMSCS, and CRFS averaged 0.232, 0.101, and 0.020, while for high management herds average heritabilities were 0.283, 0.097, and 0.009. For the low management herds, genetic (and phenotypic) correlations between MEM and LMSCS, MEM and CRFS, LMSCS and CRFS averaged 0.247, $-$0.407, and $-$0.228, ($-$0.055, $-$0.174, and $-$0.037), while for the high management herds they averaged 0.178, $-$0.304, and $-$0.139, ($-$0.089, $-$0.171, and $-$0.034). The genetic correlations between pairs of traits were consistently lower in high than in low management groups, suggesting a genotype by environment interaction. These changes suggest that differences of management between the two management levels reduces considerably the antagonistic genetic association between the traits studied. Breeding programs designed to increase milk yield at the same time that to reduce the genetic increase of LMSCS and the rate of genetic deterioration of CRFS must take into account the magnitude of the differences in the expected correlated responses in LMSCS and CRFS in the two levels of management.
