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Table 3 Variance components and genotype ranking for stages and duration traits of bud set process.

From: Phenotypic plasticity, QTL mapping and genomic characterization of bud set in black poplar

CNL Variance components (%) Broad-sense heritability Spearman Rank
  σ2E2P σ2G2P σ2G×E2P σ2ε2P H2gen CV H2gen VT ρ
date2.5 0.0 ns 29.6 *** 19.0 *** 51.4 0.84 0.73 0.51 ***
date2 1.1 *** 27.1 *** 18.8 *** 53.0 0.81 0.74 0.51 ***
date1.5 5.6 *** 21.8 *** 16.8 *** 55.8 0.75 0.73 0.46 ***
date1 9.7 *** 17.2 *** 13.1 *** 60.0 0.70 0.64 0.39 ***
date0.5 2.9 *** 5.8 *** 9.2 *** 82.1 0.43 0.45 0.22 **
duration2.5 3.2 *** 8.9 *** 0.0 ns 87.9 0.36 0.28 0.27 **
duration2 14.5 *** 2.9 *** 7.7 ** 74.8 0.49 0.24 0.09 ns
duration1.5 6.3 *** 0.9 *** 11.5 *** 81.3 0.57 0.15 0.06 ns
duration1 12.4 *** 1.9 *** 16.3 *** 69.4 0.62 0.10 0.08 ns
subproc1 11.3 *** 5.3 *** 4.9 * 78.4 0.44 0.27 0.18 *
subproc2 3.1 *** 0.8 *** 20.0 *** 76.1 0.67 0.15 0.01 ns
  1. Data were obtained from a Populus nigra full-sib family (POP5) grown in two sites in Italy: Cavallermaggiore (CV) and Viterbo (VT). Data were analyzed on cumulative night length (CNL) basis. Relative importance of environment (σ2E), genotype (σ2G), genotype by environment (σ2G×E) and residual (σ2ε) effects on the phenotypic variation (σ2P) are presented together with values of broad-sense heritability at genotypic level (H2gen). Spearman rank coefficients (ρ) were calculated from genotype means in CV and VT. The significance level of differences between the two parents for each trait is indicated as: ns, non-significant; *, P ≤ 0.05; **, P ≤ 0.01; ***, P ≤ 0.001.