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Table 5 Correlation analysis (r and P values indicated) comparing pecan scab severitya in provenances and families in provenances among years and assessment methods

From: Foliage and fruit susceptibility of a pecan provenance collection to scab, caused by Venturia effusa

Provenance/family Scale and year MP 1998 MP 2013 MP 2014 MS Leaf 2018 MS Leaf 2019 OS Leaf 2018 OS Leaf 2019 MS Fruit 2018 MS Fruit 2019 OS Fruit 2018 OS Fruit 2019
Provenance Scale 1998 0.954 0.891 0.923 0.807 0.760 0.784 0.789 0.795 0.804 0.754 0.823
< 0.0001 < 0.0001 < 0.0001 < 0.0001 0.0002 < 0.0001 < 0.0001 < 0.0001 < 0.0001 0.0002 < 0.0001
MP 1998   0.823 0.749 0.890 0.833 0.788 0.718 0.954 0.944 0.947 0.958
  < 0.0001 0.0001 < 0.0001 < 0.0001 < 0.0001 0.0005 < 0.0001 < 0.0001 < 0.0001 < 0.0001
MP 2013    0.955 0.855 0.878 0.854 0.812 0.794 0.807 0.837 0.836
   < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
MP 2014     0.816 0.887 0.861 0.924 0.722 0.792 0.774 0.815
    < 0.0001 < 0.0001 < 0.0001 < 0.0001 0.0005 < 0.0001 < 0.0001 < 0.0001
Family in provenance Scale 1998 0.953 0.827 0.896 0.775 0.758 0.824 0.804 0.711 0.685 0.813 0.827
< 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
MP 1998   0.767 0.614 0.685 0.596 0.777 0.589 0.789 0.712 0.817 0.823
  < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
MP 2013    0.821 0.624 0.653 0.775 0.630 0.623 0.548 0.641 0.680
   < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
MP 2014     0.580 0.530 0.766 0.769 0.494 0.504 0.604 0.645
    < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001 < 0.0001
  1. All analyses are based on Pearson’s correlation analysis, except those including the scale data from 1998 that are based on Spearman’s rank correlation analysis
  2. aScale = in 1998 tree score based on a 1–5 ordinal scale (Hunter and Roberts 1978); and in 2013 and 2014 using a percentage scale: MP = mean percent based on a sample of 10 leaves (Bock et al. 2016a), and using mid-point means based on a modified ordinal scale (Chiang et al. 2014) MS = Most severe based on severity estimate of the most scabbed leaf or fruit; OS = Overall severity based on an assessment of the overall disease on all leaves or fruit in the canopy