Table 1.
Evaluation of seven different Bt and five non-Bt parental maize genotypes for AMF colonization in a field experimentd,e,f
| Bt maize hybrid | Company; plant ID and descriptiong | Cry protein | Target(s) of efficacy | Maize type | Parental isoline (P) |
|---|---|---|---|---|---|
| B1 | Syngenta; attribute, Bt 11: BC0805 | Cry1Ab | European corn borer, corn ear worm, fall armyworm | Triple sweet hybrid sweet corn | P1a |
| B2 | NAb | Cry34/35Ab1 | Western corn rootworm, Northern corn rootworm, and Mexican corn rootworm; glufosinate tolerance, glyphosate tolerance | Field corn | P2 |
| B3 | NA | Cry34/35Ab1 | Western corn rootworm, Northern corn rootworm, and Mexican corn rootworm; glufosinate tolerance | Field corn | P3 |
| B4 | NA | Cry1F Cry34/35Ab1 | Western bean cutworm, European corn borer, black cutworm, and fall armyworm; glufosinate tolerance; Western corn rootworm, Northern corn rootworm; glyphosate tolerance | Field corn | P4 |
| B6 | NA | Cry1F | Western bean cutworm, European corn borer, black cutworm, and fall armyworm; glyphosate tolerance, glufosinate tolerance | Field corn | P3 |
| B7 | Monsanto; DKC51-41, Mon 863, NK603c | Cry3Bb1 | Corn rootworm; glyphosate tolerance (RR2) | Field corn | P5, DKC51-45 (RR2) |
| B8 | Monsanto; DKC50-20, Mon810, Nk603c | Cry1Ab | European corn borer; glyphosate tolerance (RR2) | Field corn | P5, DKC51-45 (RR2) |
The Bt 11 transgene was backcrossed into one of the parents of Providence (P1) to create the variety BC0805. This Bt 11 cultivar was transformed using plasmid pZ01502 (containing the cry1Ab, pat, and amp genes) to express the Cry1Ab protein of B. thuringiensis.
NA, not available. Our seed agreement prohibits us from disclosing information about this seed industry representative, the genetics of the Bt and parental isolines, or other information related to the seeds provided for this study.
Nk603 is the gene for Round Up Ready 2 (RR2) glyphosate tolerance.
Information on plant ID, Cry protein, protection, and maize type was obtained from the seed suppliers and the U.S. Environmental Protection Agency Current and Previously Registered Section PIP Registrations (64).
The Bt maize hybrids were assigned numbers B1 to B8 (B5 was not included in this experiment), and their corresponding non-Bt parental base hybrids were assigned numbers P1 to P5. Note that P3 was the parental line for B3 and B6, and P5 was the parental line for B7 and B8. The Bt maize cultivars that express the same proteins differ in the background genetics of their parental line.
This table was modified from reference 11 with permission from the publisher.
ID, identifier.