Table 6-7. F2 segregation for testa color with chi-square test for goodness-of-fit to the
2
expected ratio of 1 red:15 pink:48 purple.
F1 Testa color X7 test Cross families Red Pink Purplet Source df X2 P
no. -- no. of plants
PI 262090 3 Ot 4 : 50 : 157 Total 6 1.91
x E 3 50 158 Summed 2 0.17 0.90-0.95 PI 445924 Homog. 4 1.74 0.75-0.90
M4-2 3 0 6 66 195 Total 6 5.75
x E 4 63 200 Summed 2 1.13 0.50-0.75 PI 445924 Homog. 4 4.62 0.25-0.50
tThe testa that were classified as purple and light purple were grouped together to form the purple class.
$0 = Observed frequency, E = Expected frequency. Homog. = Homogeneity.