Table 3. Total Seed Number from Self-Pollination of Backcross 2 Plants Containing or Lacking the Designated Transgenic Event and Containing or Lacking the Endogenous Functional Sh2 Allele.
| Event | Parental Genotype | First Planting Seed No. | Ratio | Second Planting Seed No. | Ratio | Third Planting Seed No. | Ratio | Average | Ratio |
|---|---|---|---|---|---|---|---|---|---|
| 97 | Addition | 301* | 1.23 | 302 | 1.08 | 407 | 1.71 | 337** | 1.31 |
| Substitution | 338* | 1.39 | 267 | 0.96 | 390 | 1.64 | 335** | 1.31 | |
| Control | 243 | 279 | 237 | 257 | |||||
| 73 | Addition | 340** | 1.61 | 303* | 1.51 | 457 | 1.26 | 344* | 1.26 |
| Substitution | 276 | 1.31 | 355 | 1.77 | 359 | 0.99 | 324 | 1.18 | |
| Control | 211 | 200 | 362 | 274 | |||||
| 133 | Addition | 375 | 0.93 | 503* | 1.53 | 450 | 0.80 | 469 | 1.24 |
| Substitution | 360 | 0.89 | 521* | 1.59 | 462 | 0.82 | 419 | 1.11 | |
| Control | 408 | 329 | 562 | 377 | |||||
| 183 | Addition | 414 | 1.14 | 450 | 1.20 | 414* | 1.44 | 425** | 1.25 |
| Substitution | 313 | 0.86 | 377 | 1.00 | 346 | 1.20 | 344 | 1.01 | |
| Control | 364 | 376 | 287 | 340 | |||||
| 114 | Addition | 314 | 0.98 | 416 | 0.97 | 411* | 1.11 | 382 | 1.09 |
| Substitution | 327 | 1.02 | 373 | 0.87 | 352 | 0.95 | 354 | 1.01 | |
| Control | 321 | 428 | 371 | 352 | |||||
| 286 | Addition | 328 | 1.15 | 402* | 1.35 | 466** | 1.45 | 385** | 1.30 |
| Substitution | 273 | 0.95 | 429** | 1.43 | 397* | 1.23 | 379** | 1.28 | |
| Control | 286 | 299 | 323 | 297 | |||||
| 25 | Addition | 255 | 1.15 | 413** | 1.48 | 389 | 1.37 | 360** | 1.15 |
| Substitution | 290 | 1.31 | 381* | 1.37 | 425 | 1.50 | 334** | 1.31 | |
| Control | 222 | 278 | 284 | 241 | |||||
| 76 | Addition | 263 | 1.04 | 364 | 1.26 | 438* | 1.32 | 351* | 1.23 |
| Substitution | 259 | 1.02 | 341 | 1.18 | 383 | 1.15 | 338* | 1.19 | |
| Control | 252 | 290 | 332 | 284 | |||||
| Average | Addition | 330**c | 1.19 | 380**b | 1.24 | 426**a | 1.31 | 378** | 1.26 |
| Substitution | 304b | 1.10 | 368**a | 1.20 | 381**a | 1.17 | 350** | 1.17 | |
| Control | 276b | 307a,b | 325a | 299 |
The three genotypes are defined in Figure 1. Plants were grown in Citra, Florida, in the spring of 2005. Plantings were done weekly over 3 weeks and are labeled first, second, and third planting. Total seed numbers marked with asterisks designate significant differences at the 5% (*) or 1% (**) level from the cognate nontransgene control of the same planting date. The ratio is the seed number of each of the two transgene-containing genotypes divided by the seed number of the nontransgenic control that contains one copy of the functional Sh2 allele. Letters refer to significant (5%) differences distinguishing the three planting dates. Averages and ratios of all events were calculated from all individual data. The total population was 498 ears and 170,448 kernels.