New Zealand lamb breeders measure the following variance values f...

Question

New Zealand lamb breeders measure the following variance values for their herd.

Trait VP VG VA
Body mass (kg) 42.4 20.5 7.4
Body fat (%) 38.9 16.2 5.7
Body length (cm) 51.6 26.4 8.1

Calculate the broad sense heritability (H²) and the narrow sense heritability (h²) for each trait in this lamb herd.

Accepted Answer

Hello everyone and welcome to today's video. So horse breeders measure the variant values for their herd in high speed and endurance determine the broad sense heritability or capitalize H squared and the narrow sense heritability or lowercase I H square for each trade respectively. So given a table that contains the trade and certain values for it as well as answer choices with each of the broad sense and narrow sense heritability for each trait. Now, in order to solve this problem, we need to know certain formulas that are going to help us calculate the broad sense and the narrow sense heritability. For example, for this broad sense heritability, the formula is going to be as follows. And for our sense heritability, the formula is going to be as follows. So all we have to do here is calculate these values for each trait in order to solve this problem. So let's begin with height, height. Here we have this V G value being 8. divided by V P which is going to be 14.5. And this is going to be equal to 0. 655. And then we have then our sense her ability, which is going to be 2.5 divided by 14.5, which is going to be equal to 0.1724. Moving on, we're going to calculate speed and speed is going to be 28.1 divided by 53 0.8. And this is going to be equal to zero point five 224. And then we have then our sense heritability, which is going to be 10.5 divided by 53.8. And this is going to be equal to zero point one 952. And finally, let's calculate endurance here. This is going to be 65. divided by 1 20.2. And this is going to be equal to 0. or seven. While the neuros sense her is going to be 0.9 divided by 0.2. And this is going to be equal to 0.1988. So there's a lot of calculating here. However, we can just obtain the values from the table and just make a simple division, division using our calculators. So after all, we have obtained all of these values, the correct answer for this question is going to be a. So we have 0.5655 comma 0.1724 for height, then 0.5 224, comma 0.1952 for speed. And then we have 0. 2.5447. Comma 0.1988 for endurance. These are the broad sense and narrow sense, heritability for each of the traits. I really hope this video helped you and I hope to see you on the next one.

New Zealand lamb breeders measure the following variance values for their herd. Trait VP VG VA Body mass (kg) 42.4 20.5 7.4 Body fat (%) 38.9 16.2 5.7 Body length (cm) 51.6 26.4 8.1 Calculate the broad sense heritability (H²) and the narrow sense heritability (h²) for each trait in this lamb herd.

Key Concepts

Broad Sense Heritability (H²)

Narrow Sense Heritability (h²)

Phenotypic Variance (VP)

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