Skip to main content

Table 6 Chi-squared test to calculate the associations between the parental haplotype combinations (T1-C1, T1-C2, T2-C1 and T2-C2) and the number of resistant/susceptible trees

From: Identification of candidate genes involved in Witches’ broom disease resistance in a segregating mapping population of Theobroma cacao L. in Brazil

QTL 1 QTL 2 QTL 3 Total Observed Expected P-value % resistant
Resistant Suscept. Resistant Suscept.
QTL9.1_T2-C1 NA NA 110 92 18 55 55 1.72E-12 83.6
QTL6.1_T2-C2 NA NA 128 101 27 64 64 6.12E-11 78.9
QTL9.1_T2-C2 NA NA 116 93 23 58 58 8.07E-11 80.2
QTL7.1_T1-C2 NA NA 111 88 23 55.5 55.5 6.85E-10 79.3
QTL9.2_T2-C1 NA NA 117 90 27 58.5 58.5 5.73E-09 76.9
QTL9.1_T2-C1 QTL9.2_T2-C1 NA 68 59 9 34 34 1.33E-09 86.8
QTL9.1_T2-C2 QTL6.1_T2-C2 NA 37 35 2 18.5 18.5 5.79E-08 94.6
QTL9.1_T2-C2 QTL6.2_T2-C2 NA 41 37 4 20.5 20.5 2.55E-07 90.2
QTL9.1_T2-C1 QTL7.1_T1-C1 NA 34 32 2 17 17 2.68E-07 94.1
QTL9.1_T2-C2 QTL9.2_T2-C2 NA 71 57 14 35.5 35.5 3.34E-07 80.3
QTL9.1_T2-C2 QTL6.1_T2-C2 QTL6.2_T2-C2 20 19 1 10 10 0.000057 95.0
QTL9.1_T2-C2 QTL9.2_T2-C2 QTL6.1_T2-C2 23 21 2 11.5 11.5 0.000074 91.3
QTL9.1_T2-C1 QTL9.2_T2-C1 QTL3.1_T2-C1 18 17 1 9 9 0.000162 94.4
QTL9.1_T2-C2 QTL9.2_T2-C2 QTL7.1_T1-C2 18 17 1 9 9 0.000162 94.4
QTL9.1_T2-C2 QTL9.2_T2-C2 QTL6.2_T2-C2 24 21 3 12 12 0.000239 87.5
  1. The threshold for susceptible trees was set for trees with more than ten total vegetative brooms over the whole period of 4 years. For the combinations of two or three different QTLs, the first QTL was always QTL9.1 since it showed the highest association as a single QTL
  2. ‘NA’, not applicable