2 edition of genetic basis for constructing selection indexes ... found in the catalog.
genetic basis for constructing selection indexes ...
L. N. Hazel
1943 in [n.p .
Written in English
|Statement||by Lanoy Nelson Hazel ...|
|LC Classifications||SF105 .H33|
|The Physical Object|
|Pagination||, -490 p. incl. tables, diagrs.|
|Number of Pages||490|
|LC Control Number||a 44001689|
Estimates of genetic gains by selection indices and the REML / Blup method Since the Mulamba & Mock index was recognized as the most satisfactory among the selection indices based on the least squares methods, the estimated genetic gains were compared with the additive selection index based on the. Understanding and estimating the structure and parameters associated with the genetic architecture of quantitative traits is a major research focus in quantitative genetics. How Genetics Is Changing Our Understanding of ‘Race’ that race is a social concept with no genetic basis. A classic example often cited is . less well each of a greater number of topics. If this book is mastered, then the rest of population genetics should be approachable. Population genetics is concerned with the genetic basis of evolution. It differs from much of biology in that its important insights are theoretical rather than observational or Size: 8MB.
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"The key is man's power of accumulative selection: nature gives successive variations; man adds them up in certain directions useful to him."—Darwin, p.
35, sixth edition of The Origin of Species. Cited by: THE GENETIC BASIS FOR CONSTRUCTING SELECTION INDEXES L. HAZEL2 Iowa State College, Ames, Iowa Received “The key is man’s power of accumulative selection: nature gives successive variations; man adds them up in certain directions useful to him.”-Darwin, p.
35, sixth edition of The Origin of Species. Genetic basis for constructing selection indexes. book by: The Genetic Basis for Constructing Selection Indexes. Hazel. Author information Article notes Cited by: THE GENETIC BASIS FOR CONSTRUCTING SELECTION INDEXES THE GENETIC BASIS FOR CONSTRUCTING SELECTION INDEXES L.
Hazel â The key is manâ s power of accumulative selection: nature gives successive variations; man adds them up in certain directions useful to him.â -Darwin, p. 35, sixth edition of The Origin o Species. Genetic change results from selection on an economic breeding objective in beef cattle.
Enns RM, Nicoll GB J Anim Sci, 86(12), 09 May Cited by: Two traits selection index: When two traits for construction of selection index are used then the genetic worth of an individual can be expressed as H=a1G1+a2G2 Where, G1,G2 are the genotype values of individual character and a1,a2, refer to their relative economic importance.
This research focuses on analyzing various traits through an aggregate breeding value and selection index. In this study, the traditional formula of annual genetic gain is used to allow a detailed analysis of biomass future behavior Cited by: 7.
Selecting Animals with Selection Indexes Selection indexes are utilised by livestock breeders of many species around the world and aid in the selection of animals for use within a breeding program where there are several traits of economic or functional importance.
Selection indexes provide an overall “score” of an animal’s genetic value File Size: KB. Books at Amazon. The Books homepage helps you explore Earth's Biggest Bookstore without ever leaving the comfort of your couch. Here you'll find current best sellers in books, new releases in books, deals in books, Kindle eBooks, Audible audiobooks, and.
Hayes, J. F., and W. Hill, A reparameterization of a genetic selection index to locate its sampling properties. Biometrics 36 – Hazel, L. N., The genetic basis for constructing a selection index, pp.
– in Papers on Quantitative Genetics and Related Topics. Department of Genetics, North Carolina State College, Raleigh, by: Alternative constructions for a selection index.
Economic Testing Recorded traits on daughters for progeny weights alternative' testing of bulls Alternative A 1a,b,c Protein 2a,b,c 3a,b,c Protein and udder2 Alternative B 1, 2 As above Restricted a, b, c Protein, mastitis, fertility, SCC, and udder2 As alternative 2 Cited by: Eisen EJ.
Mating designs for estimating direct and maternal genetic variances and direct-maternal genetic covariances. Can J Genet Cytol. Mar; 9 (1)– Hazel LN. The Genetic Basis for Constructing Selection Indexes. Genetics. Nov; 28 (6)– [PMC free article] Thompson R.
The estimation of maternal genetic by: Assessment of genetic variability, heritability, character association and selection indexes in chickpea (Cicer arietinum L.) Akhtar LH, Pervez MA, Nasim M.
Genetic divergence and interrelationship studies in chickpea (Cicer arietinum L.).Pakistan. Selection indices that maximize the correlation between an individual organism's index score and its breeding value frequently require a priori known “economic” weights before the optimum phenotypic weights can be estimated.
The long generation intervals and economic uncertainty that surround forest tree breeding can make the choice of weights by: The classic selection index proposed by Smith () and Hazel () was the selection criterion that presented the best results for gains in fruit number and fruit weight, being indicated as the most appropriate selection strategy for genetic breeding in the studied by: 3.
Selection Indexes – A General Introduction importantly traits. While this provides cattle producers with a comprehensive range of information regarding the genetic merit of an animal, it can Selection Index can be produced for any particular production scenario and market.
The genetic basis for con- structing selection indexes. Genetics 5 Heidhuis, T., L. Van Vleck, andC. Henderson. A comparison between expected and actual accuracy of sire proofs under the New York system of sampling by: 2.
Genetic and Environmental Correlations Among Production Traits of Poultry HANS ABPLANALP Department of Poultry Husbandry, University of California, Davis, Calif. (Received for publication August 3, 19S6) A ^ E N E T I C parameters for the con^ - * struction of selection indexes in connection with selective improvement of poultry flocks has been subject to only limited Cited by: Abstract.
The constrained linear genomic selection index (CLGSI) is a linear combination of genomic estimated breeding values useful for predicting the net genetic merit, which in turn is a linear combination of true unobservable breeding values of the traits weighted by their respective economic : J. Jesus Cerón-Rojas, Jose Crossa.
Heritability and repeatability estimates were obtained for these scores, and phenotypic and genetic cor- relations between scores were estimated. Correlations also were obtained between udder height and the scores for clinical mastitis, bacterial infection, and leucocyte by: Scientific and technological advancements have led to great expansion of poultry sector in last few decades.
The development of genetically superior stocks capable of higher production, even under adverse climatic conditions, has transformed poultry from rural farming to full-fledged industry within 30–35 years. Increase in production volume and productivity per bird may Author: Vishesh Kumar Saxena, Gautham Kolluri.
Scenario of Genetic Selection and Its Impact on Bovine Mastitis. genetic basis for constructing selection indexes. and a phenotypic index of the type traits most closely related to. Des Nicholl presents here a new, fully revised, and expanded edition of his popular undergraduate-level textbook.
Many of the features of the original edition have been retained; the book still offers a concise technical introduction to the subject of genetic engineering. However, the book is now divided into three main sections: the first introduces students to basic 4/5(5).
Evaluation of the dairy fertility genetic evaluation model using selection index theory K. ST ACHO WICZ 1, G.M. JENKINS 1, N.A. DENNIS 1, P.R. AMER 1. This paper reviews the basic theory and summarizes various modifications of the selection index. The limitations of selection index are discussed in four parts: (1) changes of parameters due to selection.
(2) sampling errors of parameter estimation. (3) evaluation of relative economic weights and (4) internal deterrents to index by: Read this book on Questia. Genetic Basis of Selection by Michael Lerner, | Online Research Library: Questia Read the full-text online edition of Genetic Basis of Selection ().
Net present value (NPV) is a method used to determine the current value of all future cash flows generated by a project, including the. An issue is how molecular (e.g., dense marker maps) and phenotypic information (e.g., some measure of yield in plants) is to be used for predicting the genetic value of candidates for selection.
Multiple regression, selection index techniques, best linear unbiased prediction, and ridge regression of phenotypes on marker genotypes have been Cited by: This book is printed on acid-free paper.
A.J. Nair. Introduction to Biotechnology and Genetic Engineering. ISBN: The publisher recognizes and respects all marks used by companies, manufacturers, and developers as a means to distinguish their products. All brand names and product names mentioned in this book.
GENETIC selection for greater feed efficiency in meat type stocks and the utilization of high energy feed with lower pigmenting capacity may likely result in relatively less pigment being deposited in the skin and shanks of chickens. For good consumer acceptance, the carcass should be reasonably well by: 3.
• The book covers the discipline of animal breeding from its history, quantitative genetic principles, selection, mating systems and the breeding methods used for.
Index 1 which incorporate all traits was the best (R IH = ) and through this index could be improve all traits together. The present results indicated that genetic improvement for pre-weaning growth traits of Friesian calves could be achieved through multiple trait selection indexes.
scientific literature on selection indexes. CLASSICAL SELECTION INDEX Selection index is a technology to maximize genetic improvement in a specified objective, in this case profitability.
The relative contribution to profitability of any candidate for selection as a potential parent (H) can be specified as: H = a g (1) where, the. Hazel LN. The Genetic Basis for Constructing Selection Indexes. Genetics. Nov; 28 (6)– [PMC free article] Hillel J, Schaap T, Haberfeld A, Jeffreys AJ, Plotzky Y, Cahaner A, Lavi U.
DNA fingerprints applied to gene introgression in breeding programs. Genetics. Mar; (3)– [PMC free article]Cited by: Selection and estimation of the genetic gain in segregating generations of papaya (Carica papaya L.) Article (PDF Available) in Crop breeding and applied biotechnology 8(1).
Darwin's theory of natural selection lacked an adequate account of inheritance, making it logically incomplete. We review the interaction between evolution and genetics, showing how, unlike Mendel, Darwin's lack of a model of the mechanism of inheritance left him unable to interpret his own data that showed Mendelian ratios, even though he shared with Mendel a Cited by: The genetic and molecular basis of adaptive evolution is still largely unknown.
Some researchers have championed a pre-eminent role for regulatory changes during evolution of Cited by: Selection is the stage of a genetic algorithm in which individual genomes are chosen from a population for later breeding (using the crossover operator).
A generic selection procedure may be implemented as follows: The fitness function is evaluated for each individual, providing fitness values, which are then normalized. Richard Charles "Dick" Lewontin (born Ma ) is an American evolutionary biologist, mathematician, geneticist, and social commentator.A leader in developing the mathematical basis of population genetics and evolutionary theory, he pioneered the application of techniques from molecular biology, such as gel electrophoresis, to questions of genetic variation and al advisor: Theodosius Dobzhansky.
The events leading to the generation of broadly neutralizing antibodies to influenza viruses, which may hold the key to developing a universal flu Cited by:. Acquired traits, for the most part, are not heritable.
For example, if an athlete works out in the gym every day, building up muscle strength, the athlete’s offspring will not necessarily grow up to be a body builder. If there is a genetic basis for the ability to run fast, on the other hand, a parent may pass this to a child.In multivariate quantitative genetics, a genetic correlation (denoted or) is the proportion of variance that two traits share due to genetic causes, the correlation between the genetic influences on a trait and the genetic influences on a different trait estimating the degree of pleiotropy or causal overlap.The Genetic Basis of Selection Hardcover – by I.
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