Estimation of Heritability Part 1 | Methods to Estimate Broad Sense and Narrow Sense Heritability
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- เผยแพร่เมื่อ 20 ก.ย. 2024
- This video is about the methods to estimate heritability. Heritability can be estimated using different statistical methods like regression, correlation and ANOVA. In this video, I have describes the following methods:
Methods to estimate broad sense heritability
1. Monozygotic and Dizygotic twin data or Identical and fraternal tin data
Methods to Estimate Narrow Sense Heritability
1. Offspring-Parent Regression
i) Regression of offspring on one parent
ii) Regression of offspring on mid parent
2. Correlation between relatives
i) Correlation between parent and offspring
ii) Correlation between sibs (full sibs or half-sibs)
3. Analysis of Variance (ANOVA) or Intraclass Correlation
i) Intraclass correlation between full sibs
ii) Intraclass correlation between half sibs
4. Restricted Maximum Likelihood (REML) Method
Software e.g. WOMBAT, ASREML, SAS, BLUPF90
Links to previous videos
Partitioning phenotypic variance of quantitative traits into the environmental and genetic components
• Partitioning Phenotypi...
Heritability and its types
• Heritability and its T...
six common misconceptions about heritability
• Six Common Misconcepti...
Estimation of Heritability Part 2 | Regression of Offspring on One Parent
• Estimation of Heritabi...
Estimation of Heritability Part 3 | Regression of Offspring on Mid Parent
• Estimation of Heritabi...
Estimation of Heritability Part 4 | Correlation Between Relatives
• Estimation of Heritabi...
Estimation of Heritability Part 5 | Intraclass Correlation Between Half Sibs | ANOVA
• Estimation of Heritabi...
Animal Breeding and Genetics Lectures Playlist
• Animal Breeding and Ge...
The formula for estimation of broad sense heritability was H²=vG/vG why don't we use that instead of H²=2(r MZ. - r DZ) I don't get it
Heritability is the proportion of phenotypic variance that is due to genotypic variance. Mathematically, it can be expressed as vG/vP. So, this is how it is expressed but to actually calculate it you need to have calculated phenotypic and genetic variance first.
To calculate phenotypic and genetic variance scientists have developed different methods which are explained in this video. It is also explained in this video why it is very difficult to calculate broad sense heritability. All of these methods are based on ways to calculate similarities or differences in living organisms. For example, correlation tells us the strength of relationship between two variables. So, correlation can be used to calculate heritability.
I hope you got the point. If you want to fully understand these concepts then you can watch the videos series on heritability and methods to estimate heritability.
👌👍
Thank you!
Sir can u please share the pdf or ppt
I don't have any documents right now but you can get help from the books of Animal Breeding like Genetics of Livestock Improvement by John F Lasely
😅🎉@@AnimalSciences