Table 6-14. F2 segregation for testa color and nodulation with the adjusted frequency analyzed by chi- square test. for goodness-of-fit to the expected ratio with independent segregation of the
P, R2, R3, and N2 loci.
F1 Non-nod Few Normal X2 test on adj. freq.
Cross families Red Pink Purplet Red Pink Purple Red Pink Purple Source df X2 P
no. no. of plants
PI 262090 3 ERt 1 : 15 : 48 : 1 : 15 : 48 : 2 : 30 : 96 Total 24 13.32
x 0 2 : 12 : 56 : 0 : 8 : 21 : 2 : 30 : 80 Pooled 8 3.07 0.90-0.95 PI 445924 A 1 : 8 : 39 : 1 : 12 : 38 : 2 : 30 : 80 Homog. 16 10.25 0.75-0.90 E 1 : 12 :40 : 1 : 12 : 40 :2 : 25 : 79
tThe testa that were classified as purple and light purple were grouped together to form the purple class. ER = Expected ratio, 0 = Observed frequency, A = Adjusted frequency, E = Expected frequency. Homog. = Homogeneity.
C