Increase of inbreds in several cytoplasms

An additional backcross generation was made to increase seed of several standard inbreds in a number of designated cytoplasms, e.g.:

Minn. A239 in C, CA, D, EK, EP, G, J, K, L, LF, M, ME, ML, MY, OY, P, PS, RB, S, SD, SG, T, TA, TC, 181, 234, and Q;

Minn. A495 in B, C, D, EK, F, G, H, HA, I, IA, J, ML, MY, PS, R, RB, RS, SG, T, TA, TC, VG, W, 181, and 234;

Minn. A619 in Bb, B, C, CA, CH, D, EK, EP, ES, F, G, H, HA, I, IA, J, K, L, LF, M, ME, ML, MY, NT, P, PR, R, RB, RS, S, SD, SG, TA, TC, VG, W, 181, 234, and Q;

Minn. A632 in Bb, CA, CH, D, EK, EP, ES, G, HA, I, IA, J, K, L, LF, M, ME, ML, MY, NT, OY, PR, PS, RB, S, SD, SG, TA, TC, 181, 234, and Q;

Minn. A636 in CA, CH, EK, EP, F, G, HA, IA, J, K, L, M, ME, ML, MY, NT, OY, PS, RB, RS, SD, SG, TA, TC, 181, 234, and Q;

Io. B8 in B, C, CA, CH, D, EK, EP, F, G, H, HA, I, IA, J, L, LF, M, ME, ML, MY, NT, OY, P, PS, R, S, SD, SG, TA, TC, VG, W, 181, 234, and Q.

Other inbred seed increased in diverse cytoplasms include: NY AyX65, NY AyX138, NY AyX157, NY AyX187y-1, NY AyX187y-2, NY Ay499, NY Ay191-71, NY Ay303E, NY Ay490-2A, and Conn. C153. All inbreds have been back-crossed to the individual cytoplasms a minimum of eight times and, thus, are essentially isogenic. Sample lots are available upon request and a charge will be made for company orders.

V. Gracen, H. Everett, W. Tracy and C. Manchester

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

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