1Department of Plant Breeding, Andhra Pradesh Agricultural University, Hyderabad-500 030
The second generation progeny consisting of seven surviving plants of the cross between the male sterile hybrid, 2 cm 183 × E.C. 68415 and the restorer line, BCZ. 111 presented two types of segregation for the pollen fertile and sterile plants. Four of them gave a 3:1 ratio for the fertile and sterile fractions while the remaining three progenies fitted into a 9: 7 ratio, thus suggesting two genotypes in the F1 plants from the point of fertility restoration. The implications underlying this type of inheritance have been discussed and the genetic symbols of rf1rf1rf2rf2, Rf1Rf1rf2rf2 or rf1rf1Rf2Rf2 and Rf1Rf1Rf2Rf3 have been suggested for the parents 2 cm 183, E.C. 68415 and BCZ. 111 respectively.
