Heritability is the amount of variation in a trait that can be accounted for by gene variation in a population. Examine the following table and determine which of the following traits has the highest broad sense heritability (H2). Hint: A common environment (in this case the greenhouse) should remove, or at least severely diminish, the amount of trait variation due to the environment. Table 1. Plants were measured in the field and in a common greenhouse environment after 200 days of growth. Each row represents a trait measured in both the field and greenhouse. Columns represent the average phenotype value of all clones of a genotype being measured. The first three columns represent phenotypes observed in the field, the last three columns represent greenhouse observations. A more complex version of this analysis was common in my graduate lab! G107a G556 G1301 G107a G556 G1301 (Blue (Ogden (Snake (Greenhouse) (Greenhouse) (Greenhouse) River) Leaf out 35 River) 62 River) 142 44 65 131 from bud (days) Stomatal 110 497 643 245 276 237 density (count/mm²) Apical stem growth (mm) 9.6 24.7 4.1 14.8 16.0 13.2 a) Which trait would you estimate has the highest broad-sense heritability? b) Given the data above, we are not able to estimate narrow-sense heritability. Why not?
Heritability is the amount of variation in a trait that can be accounted for by gene variation in a population. Examine the following table and determine which of the following traits has the highest broad sense heritability (H2). Hint: A common environment (in this case the greenhouse) should remove, or at least severely diminish, the amount of trait variation due to the environment. Table 1. Plants were measured in the field and in a common greenhouse environment after 200 days of growth. Each row represents a trait measured in both the field and greenhouse. Columns represent the average phenotype value of all clones of a genotype being measured. The first three columns represent phenotypes observed in the field, the last three columns represent greenhouse observations. A more complex version of this analysis was common in my graduate lab! G107a G556 G1301 G107a G556 G1301 (Blue (Ogden (Snake (Greenhouse) (Greenhouse) (Greenhouse) River) Leaf out 35 River) 62 River) 142 44 65 131 from bud (days) Stomatal 110 497 643 245 276 237 density (count/mm²) Apical stem growth (mm) 9.6 24.7 4.1 14.8 16.0 13.2 a) Which trait would you estimate has the highest broad-sense heritability? b) Given the data above, we are not able to estimate narrow-sense heritability. Why not?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Heritability is the amount of variation in a trait that can be
accounted for by gene variation in a population. Examine the following table and
determine which of the following traits has the highest broad sense heritability (H2).
Hint: A common environment (in this case the greenhouse) should remove, or at least
severely diminish, the amount of trait variation due to the environment.
Table 1. Plants were measured in the field and in a common greenhouse environment
after 200 days of growth. Each row represents a trait measured in both the field and
greenhouse. Columns represent the average phenotype value of all clones of a genotype
being measured. The first three columns represent phenotypes observed in the field, the
last three columns represent greenhouse observations. A more complex version of this
analysis was common in my graduate lab!
G107a G556 G1301 G107a
G556
G1301
(Blue
(Ogden (Snake (Greenhouse) (Greenhouse) (Greenhouse)
River)
Leaf out
35
River)
62
River)
142
44
65
131
from bud
(days)
Stomatal
110
497
643
245
276
237
density
(count/mm²)
Apical stem
9.6
24.7
4.1
14.8
16.0
13.2
growth (mm)
a) Which trait would you estimate has the highest broad-sense heritability?
b) Given the data above, we are not able to estimate narrow-sense heritability. Why
not?
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