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Table 1 Heterosis of F1 hybrids

From: Analysis of the leaf methylomes of parents and their hybrids provides new insight into hybrid vigor in Populus deltoides

Clone No. Age (year) heterosis over better parent %
   Tree height DBH
H1 5 7.81 ± 0.05 1.26 ± 0.03
H2 5 12.55 ± 0.06 1.49 ± 0.02
H3 5 11.09 ± 0.04 0.72 ± 0.01
L1 5 -5.77 ± 0.03 -20.92 ± 0.03
L2 5 -7.59 ± 0.05 -21.82 ± 0.05
  1. Heterosis over higher parent was calculated as H = (F1-Ps)/Ps × 100%, where H is the amount of heterosis, F1 is the trait value of the hybrid, and Ps is the trait value of the better parent.