scholarly journals Genetic Parameter Estimates for Lamb Weight at Post-Weaning in Zandi Sheep, Using Single-Trait Animal Models

2010 ◽  
Vol 9 (17) ◽  
pp. 2220-2223
Author(s):  
K. Mohammadi ◽  
M. Mamouei ◽  
M. Bojarpour ◽  
Kh. Mirzadeh ◽  
A. Aghaei
Keyword(s):  
Animal Models ◽  
Genetic Parameter ◽  
Parameter Estimates ◽  
Zandi Sheep

Phenotypic and genetic parameter estimates for reproductive traits in Zandi sheep

2012 ◽  
Vol 45 (2) ◽  
pp. 671-677 ◽  
Author(s):  
Kourosh Mohammadi ◽  
Mohammad Taghi Beigi Nassiri ◽  
Enayat Rahmatnejad ◽  
Masoud Sheikh ◽  
Jamal Fayazi ◽  
...  
Keyword(s):  
Genetic Parameter ◽  
Reproductive Traits ◽  
Parameter Estimates ◽  
Zandi Sheep

scholarly journals Realized Sampling Variances of Estimates of Genetic Parameters and the Difference Between Genetic and Phenotypic Correlations

Genetics ◽  
1996 ◽  
Vol 143 (3) ◽  
pp. 1409-1416 ◽  
Author(s):  
Kenneth R Koots ◽  
John P Gibson
Keyword(s):  
Genetic Correlation ◽  
Genetic Parameters ◽  
Genetic Parameter ◽  
Genetic Correlations ◽  
Phenotypic Correlation ◽  
Parameter Estimates ◽  
Sampling Variance ◽  
Phenotypic Correlations ◽  
Genetic And Phenotypic Correlations ◽  
Heritability Estimates

Abstract A data set of 1572 heritability estimates and 1015 pairs of genetic and phenotypic correlation estimates, constructed from a survey of published beef cattle genetic parameter estimates, provided a rare opportunity to study realized sampling variances of genetic parameter estimates. The distribution of both heritability estimates and genetic correlation estimates, when plotted against estimated accuracy, was consistent with random error variance being some three times the sampling variance predicted from standard formulae. This result was consistent with the observation that the variance of estimates of heritabilities and genetic correlations between populations were about four times the predicted sampling variance, suggesting few real differences in genetic parameters between populations. Except where there was a strong biological or statistical expectation of a difference, there was little evidence for differences between genetic and phenotypic correlations for most trait combinations or for differences in genetic correlations between populations. These results suggest that, even for controlled populations, estimating genetic parameters specific to a given population is less useful than commonly believed. A serendipitous discovery was that, in the standard formula for theoretical standard error of a genetic correlation estimate, the heritabilities refer to the estimated values and not, as seems generally assumed, the true population values.

Genetic parameter estimates for female proportion in tongue sole (Cynoglossus semilaevis)

Aquaculture ◽  
2021 ◽  
pp. 737652
Author(s):  
Yangzhen Li ◽  
Yuanri Hu ◽  
Yingming Yang ◽  
Jiayu Cheng ◽  
Xiangming Cheng ◽  
...  
Keyword(s):  
Genetic Parameter ◽  
Cynoglossus Semilaevis ◽  
Parameter Estimates ◽  
Tongue Sole

Genetic parameter estimates for feeding pattern and production traits in pigs

1997 ◽  
Vol 1997 ◽  
pp. 31-31
Author(s):  
A.D. Hall ◽  
W.G. Hill ◽  
P.R. Bampton ◽  
A.J. Webb
Keyword(s):  
Feed Intake ◽  
Genetic Parameters ◽  
Genetic Parameter ◽  
Feeding Pattern ◽  
Parameter Estimates ◽  
Group Housing ◽  
Production Traits ◽  
Production Environment ◽  
Feeding Patterns ◽  
Potential Benefits

Until recently, to enable accurate recording of feed intake, pigs were kept in individual pens. The advent of electronic feeders has allowed accurate records of feed intake and feeding patterns in group housing which is more similar to that found in the production environment. The objectives of this study were to estimate genetic parameters for these feeding pattern traits and their correlations with production traits to show potential benefits in selection.

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