Download or read book Genetic analysis of reproductive traits in livestock written by Aixin Liang and published by Frontiers Media SA. This book was released on 2023-02-14 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Productive and Reproductive Traits in Friesian Sahiwal Crossbred Dairy Cattle written by HASSANI S and published by . This book was released on 2000 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Reproductive Measures in Dairy Cows and Their Relationship with Milk Production written by Felix Eduardo A. Beltramino and published by . This book was released on 1984 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Lifetime Production and Reproduction Traits of Dairy Cattle written by Ranjodhan Singh Sahota and published by . This book was released on 1978 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Genomics in Domestic Animals written by Zhihua Jiang and published by John Wiley & Sons. This book was released on 2011-06-17 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproductive Genomics in Domestic Animals is a thorough examination of genomics in the livestock industry, encompassing genome sciences, genome biotechnology, and reproduction. Recent developments in molecular genetics and genomics have enabled scientists to identify and characterize genes contributing to the complexity of reproduction in domestic animals, allowing scientists to improve reproductive traits. Providing the livestock industry with essential tools for enhancing reproductive efficiency, Reproductive Genomics in Domestic Animals surveys the current status of reproductive genomes and looks to the future direction of research.
Download or read book Sperm Biology written by Scott S. Pitnick and published by Academic Press. This book was released on 2008-11-21 with total page 683 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sperm Biology represents the first analysis of the evolutionary significance of sperm phenotypes and derived sperm traits and the possible selection pressures responsible for sperm-egg coevolution. An understanding of sperm evolution is fast developing and promises to shed light on many topics from basic reproductive biology to the evolutionary process itself as well as the sperm proteome, the sperm genome and the quantitative genetics of sperm. The Editors have identified 15 topics of current interest and biological significance to cover all aspects of this bizarre, fascinating and important subject. It comprises the most comprehensive and up-to-date review of the evolution of sperm and pointers for future research, written by experts in both sperm biology and evolutionary biology. The combination of evolution and sperm is a potent mix, and this is the definitive account. - The first review survey of this emerging field - Written by experts from a broad array of disciplines from the physiological and biomedical to the ecological and evolutionary - Sheds light on the intricacies of reproduction and the coevolution of sperm, egg and reproductive behavior
Download or read book Buffalo Genetics and Genomics written by Guohua Hua and published by Frontiers Media SA. This book was released on 2022-02-28 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Association Among Juvenile Growth and Female Reproductive Traits in Canadian Angus Cattle written by Drona Prakash Rasali and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Production and Reproduction Traits in Dure Bred Ingnigenous Cattle and Their Crosses with Feriesian written by Mishra.Rajani Kant and published by . This book was released on 1973 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of Genetic Parameters for Reproductive Traits in Finnish Ayrshire Cattle written by Esa Antero Mantysaari and published by . This book was released on 1988 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Production Fertility and Health Traits of Dairy Cows written by Rashid Hussain Pirzada and published by . This book was released on 2001 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Breed Structure and Genetic Analysis of Pedigreed Sahiwal Cattle written by K. M. Reddy and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed investigation was planned to study the origin and development of selected Sahiwal herds and to determine the amount of inbreeding and its effect on various economic traits, to investigate and culling rates herd life, reasons for mortality and disposal of animals at different stages of life and their influence on improvement of the breds, and to evaluate the reproductive and productive status of different herds and to estimate the optimal levels of different reproductive traits affecting milk production. The inbred studies revealed that in general there was no delectarious effect of inbreeding on various economic traits considered. The exceptions were herd life, productive life and number of calvings in some herds. A great part of the total variation for majority of the characters studied in different herds was realised to be due to intangible causes and it seems unlikely that the range of variation could be reduced by inbreeding to a significant level. About disposal pattern in heifer calves the study revealed that more care is required in summer to save the lives of calves. The analysis of causes of mortality indicated the need for early and immediate diagnosis and treatment of the ailments which were found to cause losses so that the mortality could be restricted and higher intensities of selection by way of culling the cows for low production and other economic reasons could be achieved. The results of reproductive traits indicated that the effect of level of inbreeding varied greatly and in general there was deterioration in the traits among marginally inbred, moderate inbred and closely inbred groups while the trend was reverse in highly inbred cows. The reproductive traits recorded higher values during first lactation and in later lactations then did not differ much. The results obtained for different life time traits indicated that per day of production life and life time production were lower for herds having higher herd life and productive life and vice-versa. The results obtained concerning the effect of age at first calving on different first lactation traits revealed that the optima differed from herd to herd and from trait to trait, within a herd, indicating no significant role of age at first calving in determining these traits. It is concluded from the estimates that 30-39 months of age at first calving would be optimum for heifers to have higher performance in later life.
Download or read book Genetic Analysis of Production and Reproduction Traits in Pure Bred Indigenous Cattle and Their Crosses with Friesian written by Rajani Kant Misra and published by . This book was released on 1973 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Genomic Approaches for the Genetic Analysis of Complex Traits in Livestock Species written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation deals with the genetic analysis of complex traits in livestock species. The first part focuses on the analysis of bull fertility with the aim of finding and characterizing genomic regions responsible for the genetic variation in this trait in cattle. Two complementary studies were performed, namely a genome-wide association study and a subsequent quantitative trait pathway-based analysis. These studies identified genomic regions, and particularly individual genes and pathways that showed significant effects on bull fertility. These findings contribute to a better understanding of the genetics underlying this complex traits in cattle, as well as provide opportunities for changing fertility by means of selective breeding. The second part of this thesis tackles the effect of maternal nutrition on the epigenome of the offspring in order to understand the genetic mechanisms underlying fetal programing in livestock. In particular, the effect of maternal methionine supplementation on the transcriptome of bovine preimplantation embryos, and the impact of different maternal diets on the transcriptome of fetal tissues in sheep were investigated. These studies provided evidence that maternal diet can indeed modulate gene expression in the offspring. Determination of gene expression changes could foreshadow potential effects of maternal diets on the future development of offspring, such as postnatal growth, production, health, and reproductive performance. The last part of this thesis evaluates the inference of causal networks in multivariate genetic systems. In particular, the inference of causal networks including latent variables in a quantitative genetics context, and the reconstruction of gene-phenotype networks integrating multi-omics data were investigated. Both procedures were applied to pig data to unravel the mechanisms underlying the antagonist relationship between growth and meat lean content with fat deposition and product quality. More generally, the proposed methods provide useful analytical tools to further learning about phenotypic and molecular causal structures underlying complex traits in farm species
Download or read book Sperm Competition and Sexual Selection written by Tim R. Birkhead and published by Academic Press. This book was released on 1998-08-25 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sperm Competition and Sexual Selection presents the intricate ways in which sperm compete to fertilize eggs and how this has prompted reinterpretations of breeding behavior. This book provides a theoretical framework for the study of sperm competition, which is a central part of sexual selection. It also discusses the roles of females and the relationships between paternal care in sperm competition. The chapters focusing on taxonomic development are diverse and cover all the major animal groups, both vertebrate and invertebrate, and plants. The final chapter provides an overview discussing the relationship between sperm competition and sexual selection in terms of both function and mechanism and how these translate into species fitness. This book will be of prime interest to behaviorists, ecologists and evolutionary biologists, suggesting new avenues of research and new ways of approaching old problems.
Download or read book Adaptation and Fitness in Animal Populations written by Julius van der Werf and published by Springer Science & Business Media. This book was released on 2008-10-17 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fitness and adaptation are fundamental characteristics of plant and animal species, enabling them to survive in their environment and to adapt to the inevitable changes in this environment. This is true for both the genetic resources of natural ecosystems as well as those used in agricultural production. Extensive genetic variation exists between varieties/breeds in a species and amongst individuals within breeds. This variation has developed over very long periods of time. A major ongoing challenge is how to best utilize this variation to meet short-term demands whilst also conserving it for longer-term possible use. Many animal breeding programs have led to increased performance for production traits but this has often been accompanied by reduced fitness. In addition, the global use of genetic resources prompts the question whether introduced genotypes are adapted to local production systems. Understanding the genetic nature of fitness and adaptation will enable us to better manage genetic resources allowing us to make efficient and sustainable decisions for the improvement or breeding of these resources. This book had an ambitious goal in bringing together a sample of the world’s leading scientists in animal breeding and evolutionary genetics to exchange knowledge to advance our understanding of these vital issues.
Download or read book The Effects of Synchronization Protocals on Genetic Parameters of Reproductive Traits in Dairy Cattle written by Robert C. Goodling and published by . This book was released on 2004 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
