Comparison of efficiency of alternative selection strategies: An example of selection for resistance to common scab in potatoes

1996 ◽  
Vol 76 (4) ◽  
pp. 849-852 ◽  
Author(s):  
G. C. C. Tai ◽  
A. Murphy ◽  
H. De Jong
Keyword(s):  
Confidence Intervals ◽  
Common Scab ◽  
Normal Approximation ◽  
Field Resistance ◽  
Approximation Procedure ◽  
Individual Selection ◽  
Response To Selection ◽  
Selection Strategies ◽  
Point Estimates ◽  
Selection For

This paper describes a procedure for obtaining point estimates and confidence intervals of response to different selection strategies based on results of analysis of variance. Three alternative selection strategies were compared: family, within-family, and individual selection. Experimental data on field resistance of potato seedlings to common scab were used to illustrate the procedure. The confidence intervals were then compared with the intervals established by a normal-approximation procedure. Key words: Common scab, confidence intervals, response to selection, Solanum tuberosum

scholarly journals Gains through selection for grain yield in a winter wheat breeding program

2019 ◽  
Author(s):  
Dennis N. Lozada ◽  
Arron H. Carter
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Wheat Breeding ◽  
Breeding Program ◽  
Response To Selection ◽  
Breeding Values ◽  
Wheat Breeding Program ◽  
Selection Strategies ◽  
Selection For ◽  
Estimated Breeding Values

AbstractIncreased genetic gains for complex traits in plant breeding programs can be achieved through different selection strategies. The objective of this study was to compare potential gains for grain yield in a winter wheat breeding program through estimating response to selection R values across several selection approaches including phenotypic (PS), marker-based (MS), genomic (GS), and a combination of PS and GS. Five populations of Washington State University (WSU) winter wheat breeding lines evaluated from 2015 to 2018 in Lind and Pullman, WA, USA were used in the study. Selection was conducted by selecting the top 20% of lines based on observed yield (PS strategy), genomic estimated breeding values (GS), presence of yield “enhancing” alleles of the most significant single nucleotide polymorphism (SNP) markers identified from genome-wide association mapping (MS), and high observed yield and estimated breeding values (PS+GS). Overall, PS compared to other individual strategies showed the highest response. However, when combined with GS, a 23% improvement in R for yield was observed, indicating that gains could be improved by complementing traditional PS with GS. Using GS alone as a selection strategy for grain yield should be taken with caution. MS was not that successful in terms of R relative to the other selection approaches. Altogether, we demonstrated that gains through increased response to selection for yield could be achieved in the WSU winter wheat breeding program by implementing different selection strategies either exclusively or in combination.

Correlated response to selection for litter size in pigs: II. Carcass, meat, and fat quality traits

2002 ◽  
Vol 80 (10) ◽  
pp. 2566 ◽  
Author(s):  
J. Estany ◽  
D. Villalba ◽  
M. Tor ◽  
D. Cubiló ◽  
J. L. Noguera
Keyword(s):  
Litter Size ◽  
Correlated Response ◽  
Quality Traits ◽  
Response To Selection ◽  
Fat Quality ◽  
Selection For

Simulation of Response to Selection for Body Weight in Rainbow Trout

1981 ◽  
Vol 31 (4) ◽  
pp. 426-432 ◽  
Author(s):  
Sampo Sirkkomaa ◽  
Ulf B. Lindström
Keyword(s):  
Body Weight ◽  
Rainbow Trout ◽  
Response To Selection ◽  
Selection For

scholarly journals Response to selection for growth in an interspecific hybrid between Oreochromis mossambicus and O. niloticus in two distinct environments

Aquaculture ◽  
2014 ◽  
Vol 430 ◽  
pp. 159-165 ◽  
Author(s):  
Hugues de Verdal ◽  
Westly Rosario ◽  
Marc Vandeputte ◽  
Nerafe Muyalde ◽  
Pierre Morissens ◽  
...  
Keyword(s):  
Interspecific Hybrid ◽  
Oreochromis Mossambicus ◽  
Response To Selection ◽  
Selection For

Hollywood Rules

2017 ◽  
pp. 1-9
Author(s):  
Karl Schmedders ◽  
Charlotte Snyder ◽  
Ute Schaedel
Keyword(s):  
Confidence Intervals ◽  
Statistical Methods ◽  
Regression Models ◽  
Functional Form ◽  
Hedge Fund ◽  
Fund Manager ◽  
Wall Street ◽  
Independent Variables ◽  
Point Estimates ◽  
Hedge Fund Manager

Wall Street hedge fund manager Kim Meyer is considering investing in an SFA (slate financing arrangement) in Hollywood. Dave Griffith, a Hollywood producer, is pitching for the investment and has conducted a broad analysis of recent movie data to determine the important drivers of a movie’s success. In order to convince Meyer to invest in an SFA, Griffith must anticipate possible questions to maximize his persuasiveness.Students will analyze the factors driving a movie’s revenue using various statistical methods, including calculating point estimates, computing confidence intervals, conducting hypothesis tests, and developing regression models (in which they must both choose the relevant set of independent variables as well as determine an appropriate functional form for the regression equation). The case also requires the interpretation of the quantitative findings in the context of the application.

scholarly journals Earthquake forecasting: statistics and information

2016 ◽  
Vol 58 (6) ◽  
Author(s):  
Vladimir Gertsik ◽  
Mark Kelbert ◽  
Anatoly Krichevets
Keyword(s):  
Confidence Intervals ◽  
Decision Rule ◽  
Random Fields ◽  
Axiomatic Approach ◽  
Earthquake Forecasting ◽  
Alarm System ◽  
Conditional Probabilities ◽  
Mathematical Basis ◽  
Strong Earthquakes ◽  
Point Estimates

<div class="abstract"><div class="abstract_item"><p>The paper presents a decision rule forming a mathematical basis of earthquake forecasting problem. We develop an axiomatic approach to earthquake forecasting in terms of multicomponent random fields on a lattice. This approach provides a method for constructing point estimates and confidence intervals for conditional probabilities of strong earthquakes under conditions on the levels of precursors. Also, it provides an approach for setting a multilevel alarm system and hypothesis testing for binary alarms. We use a method of comparison for different algorithms of earthquake forecasts in terms of the increase of Shannon information. ‘Forecasting’ (the calculation of the probabilities) and ‘prediction’ (the alarm declaring) of earthquakes are equivalent in this approach.</p></div></div>

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