Download or read book Genetic and Phenotypic Parameters of Profit Functions Reproductive Efficiencies in Crossbred Cattle written by C. O. Reddy and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations were carried out to study the relationship of profit function, life production and herd life with reproductive variables and to study the relationship between first lactation and lifetime performance and to estimate the economic returns on the basis of first lactation performance. The least square analysis showed that the differences between the two genetic groups (higher and lower crosses) were significant for all the production and profit traits. Similarly the genetic group did not show significant differences in reproductive raits viz., number of inseminations per conception (1.69 and 1.74), firsst calving interval (423 and 426 days), days open percent (36.66 and 37.13) and weight at first calving (306 and 384 kg). Based on profit per day of lif an open period of 135 days in higher crosses and 134 days in lower crosses were found to be satisfactory. The days dry were optimised at 34.22 percent 26.98 percent, 20.22 percent, 24.84 percent and 24.11 percent, for hrd life, lifetime milk yield, milk yield per day of herd life, lifetime profit and profit per day of herd life in higher crosse, respectively. It was also observed that, one standard deviation decrease in mean days dry percent could maximise all the lifetime production traits in lower crosses. Long herd life was found to be necessary for maximum profit and profit per day of herd life. The age at first calving accounted for little in all the lifetime traits in both higher and lower crosses (3.11 to 5.54 percent and 0.07 to 2.11 percent). Similar observations were made with the weight at first calving. Herd life increased gradually upto first lactation (2500 kg) in lower crosses and 3000 kg in higher crosses. Increase in first lactation increased the lifetime traits. The genetic correlations between first lactation traits and lifetime traits were higher in higher crosses. Th phenotypic corrlations among lifetime traits were positive and significant except the correlations of days dry percent with other lifetime traits.

Download or read book Breeding for robustness in cattle written by Marija Klopcic and published by BRILL. This book was released on 2023-09-04 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has revealed unfavourable trends in e.g. fertility, udder health and locomotion in some major dairy cattle breeds due to a large increase in production and insufficient consideration of functional traits in the breeding goals. Such unfavourable trends in some functional traits increase costs. Additionally, the enlargement of herds leads to less available labour time per individual cow. This asks for cows that are easy to handle. At the same time, society is demanding a higher welfare standard of animals. These contradicting developments have increased the desire for so called more robust animals. Robustness can be defined as 'the ability to maintain homeostasis in commonly accepted and sustainable herds of the near future'; or 'the ability of the cow to function well in the environment she lives in as well as in a wide range of climates and production systems'. This book contains a series of articles (26) dealing with the concept of robustness, including aspects like evolution, genetics, environment, animal health and welfare, and integrity. Besides the major functional traits also the links to energy balance, hot climatic conditions, and the attitude and input of stakeholders towards robustness as part of the breeding program are discussed. This book is the first attempt to summarise the available knowledge concerning this topic in cattle, making this book unique. The contributions are from authors of 16 countries from all over the world. However, the focus is presently on farm animal level, while in future robustness of the whole production system may also require additional attention.

Download or read book Report written by National Dairy Research Institute (India) and published by . This book was released on 1979 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of Phenotypic and Genetic Relationships Among Hip Height and Productive and Reproductive Performance in Brahman Cattle written by Carlos A. Vargas L. and published by . This book was released on 2000 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT (cont.): Females of SFS and MFS surpassed LFS by demonstrating earlier calving dates, and greater calving, calf survival and weaning rates. There is a strong genetic relationship between WHH and WWT that has an impact on HH18. Thus, if the breeding objective is to manipulate growth to 18 mo of age, implementation of multiple trait breeding programs considering WHH and WWT will aid in the prediction of hip height at time of selection.

Download or read book Indian Journal of Dairy Science written by and published by . This book was released on 1997 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Parameters in Straightbred and Crossbred Beef Cattle Populations written by Richard John Dunn and published by . This book was released on 1968 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report National Dairy Research Institute written by National Dairy Research Institute (India) and published by . This book was released on 1980 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of Genetic and Phenotypic Parameters in Beef Cattle written by Will R. Getz and published by . This book was released on 1967 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on Genetic and Phenotypic Parameters of Some Economic Traits in Diferent Grades of Cross bred Friesian X Zebu Cattle written by Siya Ram Singh and published by . This book was released on 1984 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 10 Years of frontiers in genetics Past discoveries current challenges and future perspectives written by William C. Cho and published by Frontiers Media SA. This book was released on 2023-06-02 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Buffalo Health and Production written by Antonio Minervino and published by Frontiers Media SA. This book was released on 2022-04-29 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agrindex written by and published by . This book was released on 1992 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Doctoral Dissertations written by and published by . This book was released on 1983 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reproduction in Cattle written by Peter J. H. Ball and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cattle play a fundamental role in animal agriculture throughout the world. They not only provide us with a vital food source, but they also provide us with fertilizer and fuel. Keeping reproduction levels at an optimum level is therefore essential, but this is often a complicated process, especially with modern, high yielding cows. Written in a practical and user-friendly style, this book aims to help the reader understand cattle reproduction by explaining the underlying physiology of the reproductive process and the role and importance of pharmacology and technology, and showing how management techniques can improve reproductive efficiency. This edition includes: Recent research findings on the physiology of the oestrous cycle and its control; New techniques for monitoring and manipulating reproduction, including pregnancy diagnosis and embryo transfer; Advice on identifying common infertility problems and how to prevent and treat them. Reproduction Cattle 3e is essential reading for veterinary and agricultural students, as well as veterinarians and farmers involved in cattle reproduction.

Download or read book Egyptian Journal of Animal Production written by and published by . This book was released on 1990 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dairy Cattle Breeding in Pakistan written by Arif-un-Nisa Naqvi and published by . This book was released on 1989 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sustainable Food Production written by Paul Christou and published by Springer. This book was released on 2012-12-05 with total page 1869 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gathering some 90 entries from the Encyclopedia of Sustainability Science and Technology, this book covers animal breeding and genetics for food, crop science and technology, ocean farming and sustainable aquaculture, transgenic livestock for food and more.