KRASNODAR, RUSSIA
Krasnodar Research Institute of Agriculture

Inheritance of incompatible genomes in maize and Tripsacum dactyloides (2n = 72)
--E.P. Erygina and A.S. Mashnenkov

Two incompatible lines (T22 and Gk26) and a compatible one (Ig57) were used in a previously described experiment (MNL 65:72, 1991; MNL 68:51, 1994). In 1993, P1, P2, P3, F1, F2, BC1 ears were pollinated with Tripsacum dactyloides pollen according to the standard procedure (MNL 68:87, 1989).

Analysis of the ears and calculations of compatibility (c) were determined by the method developed in our laboratory (MNL 65:72, 1991). In the set of lines under research, genome incompatibility is governed by duplicate genes. The probable genetic formula of the lines is: A1 A1 a2 a2 - Gk26, A1 A1 A2 A2 - T22, a1 a1 a2 a2 - Ig57.
 
 
Number of ears 
Line or hybrid without 
developed
kernels
c=o
with
developed
kernels
c>o
Expected
ratio
X2
Gk26 8 0 8:0 0.00
T22 7 0 7:0 0.00
Ig57 0 13 0:13 0.00
Gk26 x T22 7 0 7:0 0.00
Ig57 x Gk26 4 0 4:0 0.00
BC1 (Gk26 x Ig57) 11 0 11:0 0.00
BC1 (T22 x Ig57) 10 0 10:0 0.00
BC1 (Ig57 x Gk26) 9 11 1:1 0.02
BC1 (Ig57 x T22) 13 4 3:1 0.37
F2 (Ig57 x Gk26) 17 5 3:1 0.06
F2 (Ig57 x T22) 19 1 15:1 0.05


Please Note: Notes submitted to the Maize Genetics Cooperation Newsletter may be cited only with consent of the authors

Return to the MNL 69 On-Line Index
Return to the Maize Newsletter Index
Return to the Maize Genome Database Page