Interaction of withinlocus alleles results in dominance, partial dominance, or overdominance, with a theoretical range of dominance degree from zero (no dominance) to larger than 1 (overdominance).
Interaction of inter-locus alleles  results in epistasis.

(Molecular Plant Breeding,Xu YunBi,2010,p370)

显性:指的是同一位点不同等位基因间的互作

上位性:不同位点不同等位基因间的互作

互作(interaction):可以概括两种不同形式的互作

 

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Significantly greater heterosis could result from this genetic diversity by specific
interallelic interactions (overdominance),repulsion-phase linkage among loci showing
dominance (pseudo-overdominance)(Havey, 1998) and/or inter-locus interaction(epistasis).

(Molecular Plant Breeding,Xu YunBi,2010,p371)

假超显性:由于位点间的互斥相连锁表现显性.

互斥相什么意思?

"When linked in coupling phase, the four QTL have the same amount and direction of genetic
effect; but when linked in repulsion phase, LQ1 and LQ2 have the same amount but opposite genetic
effects"(Sun et al,2010,Efficiency of selective genotyping for genetic analysis of complex traits and potential applications in crop improvement).连锁的QTL效应相同,处于相引相,连锁的QTL有不同的效应:互斥相.

亲本1: Q1-Q2

亲本2: q1-q2

杂种:  q1-Q2/Q1-q2