Trisomic stocks

The program began by Randolph in 1940 of improving and building up reserve stocks of all the available trisomes was continued in the summer of 1941. Trisomes one and four are still missing.

Root tip counts were made on over 1500 plants to determine the trisomic plants. Over 300 ears were harvested.

In making crosses several inbred stocks were used as well as different genetic tester stocks. These were all checked to make sure that no B chromosomes were present.

Selected ears have been turned over to the Coöp. and are here listed under Coöp. numbers.

Co 41-196 No. 2 trisome × Luce's Favorite Inbred

1. ⊗ - 2 ears
2. × L. F. Inbred - 5 ears
3. × lg - 2 ears

"  41-197 No. 2 trisome × Cornell II Inbred

1. ⊗ - 4 ears
2. × L.F. Inbred - 1 ear
3. # - 3 ears

"  41-198 No. 2 trisome × Inbred II (West Branch)

1. ⊗ - 1 ear
2. × L.F. - 3 ears
3. # - 1 ear

"  41-199 No. 2 trisome × lg

1. × L.F. - 4 ears
2. # - 2 ears

"  41-200 No. 3 trisome × lg2

1. ⊗ - 6 ears
2. × L.F. - 2 ears
3. # - 3 ears

"  41-201 No. 3 trisome × L.F. Inbred

1. × L.Y. - 2 ears

"  41-202 No. 3 trisome × Inbred II

1. × L.F. - 3 ears

"  41-203 No. 5 trisome × Inbred II

1. ⊗ - 1 ear
2. × L.F. - 5 ears
3. × bt - 2 ears

"  41-204 No. 6 trisome × su2

1 ⊗ - 3 ears
2. × L.F. - 5 ears
3. # - 2 ears

"  41-205 No. 7 trisome × L.F. Inbred

1. × L.F. 2 ears.(all ears of trisome 7 poor)

"  41-206 No. 7 trisome × Inbred II

1. × L.F. - 2 ears
2. × gl - 1 ear
3. open - 1 ear

"  41-207 No. 8 trisome × L.F. Inbred

1. ⊗ - 2 ears
2. × L.F. - 5 ears
3. # - 2 ears

"  41-208 No. 8 trisome × 3

1. ⊗ - 2 ears
2. # - 2 ears

"  41-209 No. 9 trisome × wx (No. 9 also wx)

1. ⊗ - 2 ears
2. × L.F. - 4 ears
3. # 1 ear

"  41-210 No. 10 trisome × L.F. Inbred

1. ⊗ - 1 ear
2. × L.F. - 4 ears
3. × v18 - 2 ears

"  41-211 No. 10 trisome × v18

1. ⊗ - 2 ears
2. × L.F. - 2 ears

John Einset