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Table 1 Hypothetical case of transgressive segregation of a quantitative morphological trait due complementary gene action

From: Genetic, morphological, and chemical patterns of plant hybridization

Locus

Phenotypic value

Species A

Species B

F1

Transgressive F2 hybrids

1

+1, +1

−1, −1

+1, −1

+1, +1

−1, −1

2

+1, +1

−1, −1

+1, −1

+1, +1

−1, −1

3

−1, −1

+1, +1

+1, −1

+1, +1

−1, −1

4

−1, −1

+1, +1

+1, −1

+1, +1

−1, −1

Net phenotypic value

0

0

0

+8

−8