Question

Artificial selection for fruit size (mean fruit weight per plant) is carried out on a population of tomatoes. In the population as a whole, mean fruit weight per plant is 75 g. Plants with mean fruit weight of 100 g per plant are selected and mated at random to produce the next generation.

(a) If narrow-sense heritability of mean fruit weight is estimated at 60%, what is the expected mean fruit weight per plant after 1 generation of selection?

(b)What is the expected mean fruit weight per plant after 5 consecutive generations of selection, when, in each generation, the chosen parents have mean fruit weight per plant 25 g above the population average in that generation? (Assume h2 remains constant)

Answer 1

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