Table 1. Estimates of QTL positions, effects, and interactions.

Chromosome	Marker	Position (cM)	LOD	Additive effecta	$R_{\mathit{par}}^2$b
1	10	49	2.76	21.7	11.4
4	22	101	3.05	21.7	10.1
5	23	69	3.41	63.6	26.7

Significant QTL determined at LOD > 2.5.

^aAll alleles increasing compensatory response originate from the Columbia ecotype.

^b$R_{\mathit{par}}^2$: partial R² provides an estimate of the amount of phenotypic variance explained by each QTL.