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Table 6 The effect of a single locus on yield where Genotypic Value 1 is a = 1 and d = v = w = 0 (simple additive model), and Genotypic Value 2 is a = 1, d = ½, v = 1 and w = ½ (form of overdominance) (from Table 3)

From: A Brief History of the Impact of Potato Genetics on the Breeding of Tetraploid Potato Cultivars for Tuber Propagation

Genotype Frequency Frequency A Genotypic Value 1 Genotype Value 2
AAAA p4 1 2 2
AAAa 4p3q ¾ 1 4
AAaa 6p2q2 ½ 0 2
Aaaa 4pq3 ¼ –1 0
aaaa q4 0 –2 -2