TABLE 3

Significant QTL for fecundity and survivorship

TraitChrom.aQTL map position (cM) (nearest marker)cM range of the 2-LOD support limitLikelihood ratiobAdditive effect/σc[r2]Change in frequencydSelection coefficient
RI fall over-winter survivorship433.83 (m518a)33.51–39.5114.40.410.100.0190.041
54.32 (o5629)0.01–12.3216.10.350.100.0210.042
RI fall fecundity126.27 (mi113)16.21–33.9521.90.410.140.0140.055
142.93 (g17286)0.01–12.3221.20.380.140.0140.054
RI spring fecundity178.80 (mi208)78.73–83.0914.50.400.080.0030.012
445.98 (g4564a)43.83–52.3332.80.440.190.0080.032
551.37 (mi219)44.38–49.1715.4–0.330.080.0040.015
595.34 (mi61)85.46–124.0815.10.270.070.0070.026
5116.57 (h2a1)106.48–123.9822.40.340.100.0090.037
5139.72 (g2368)124.94–144.0820.30.320.090.0080.031
NC fall over-winter survivorship1129.42 (agp64)122.12–140.2224.8–0.400.150.0270.039
5137.33 (g2368)131.72–148.2720.9–0.430.120.0110.023
NC spring survivorship120.64 (cds7)14.93–30.9514.4–0.390.080.0040.007
154.33 (CATTS039)49.98–58.7421.70.470.140.0100.020
521.20 (KG31)18.68–26.1229.9–0.480.200.0150.032
NC spring fecundity238.99 (O802F)32.35–49.7714.20.380.120.0110.049

RI, Rhode Island; NC, North Carolina.

  • a Chromosomal location (linkage group) of a given QTL.

  • b The significance threshold for an experiment-wide error rate of α = 0.05 was <14.2 for all traits.

  • c Signs refer to the additive effect of the allele from Col relative to Ler parent; i.e., a positive value indicates an increase in the average trait value among plants possessing the Col allele at a focal QTL.

  • d Because selection distinguishes among phenotypes, we calculated the change in allele frequency at a single QTL without controlling for the effects of QTL segregating elsewhere in the genome. As a result, the change in allele frequency at a specific QTL does not necessarily reflect the variance explained by that QTL.