2
|
Caffall KH, He C, Smith-Jones M, Mayo K, Mai P, Dong S, Ke J, Dunder E, Yarnall M, Whinna R, DeMaio J, Gu W, Sheldon J, Allen M, Costello T, Setliff K, Jain R, Snyder A, Lovelady C, Rawls E, Palmer E, Zhang Y, Bate N, Shi L, Jepson I. Long-term T-DNA insert stability and transgene expression consistency in field propagated sugarcane. Plant Mol Biol 2017; 93:451-463. [PMID: 28032251 DOI: 10.1007/s11103-016-0572-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
This study addresses T-DNA insert stability and transgene expression consistency in multiple cycles of field propagated sugarcane. T-DNA inserts are stable; no transgene rearrangements were observed. AmCYAN1 and PMI protein accumulation levels were maintained. There was no evidence that production of either protein declined across generations and no transgene silencing was observed in three commercial sugarcane varieties through commercially relevant ratooning, propagation-by-setts, and micro-propagation generation processes over 4 years of field testing. Long term transgene expression consistency and T-DNA insert stability can be achieved in sugarcane, suggesting that it is highly probable that transgenic sugarcane can be successfully commercialized. This study addresses T-DNA insert stability and transgene expression consistency in multiple cycles of field propagated sugarcane. These data are critical supporting information needed for successful commercialization of GM sugarcane. Here seventeen transgenic events, containing the AmCYAN1 gene driven by a CMP promoter and the E. coli PMI gene driven by either a CMP or Ubi promoter, were used to monitor T-DNA insert stability and consistency of transgene encoded protein accumulation through commercially relevant ratooning, propagation-by-setts, and micro-propagation generation processes. The experiments were conducted in three commercial sugarcane varieties over 4 years of field testing. DNA gel blot analysis showed that the T-DNA inserts are stable; no transgene rearrangements were observed. Quantitative ELISA showed no evidence of decreasing AmCYAN1 and PMI protein levels across generations and no transgene silencing was observed. These results indicate that long term transgene expression consistency and T-DNA insert stability can be achieved in sugarcane, suggesting that it is highly probable that transgenic sugarcane can be successfully commercialized.
Collapse
Affiliation(s)
- Kerry Hosmer Caffall
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Chengkun He
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA.
| | | | - Kristin Mayo
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Pearl Mai
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Shujie Dong
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - John Ke
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Erik Dunder
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Michele Yarnall
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Rachel Whinna
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Joe DeMaio
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Weining Gu
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Judith Sheldon
- Syngenta Jealott's Hill Research Center, Bracknell, BRK, RG42 6EY, UK
| | - Martin Allen
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Tricia Costello
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Kristin Setliff
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Rakesh Jain
- Vero Beach Research Center, Syngenta Crop Protection, LLC, 7145 58th Avenue, Vero Beach, FL, 32967, USA
| | - Ada Snyder
- Vero Beach Research Center, Syngenta Crop Protection, LLC, 7145 58th Avenue, Vero Beach, FL, 32967, USA
| | - Clark Lovelady
- Vero Beach Research Center, Syngenta Crop Protection, LLC, 7145 58th Avenue, Vero Beach, FL, 32967, USA
| | - Eric Rawls
- Vero Beach Research Center, Syngenta Crop Protection, LLC, 7145 58th Avenue, Vero Beach, FL, 32967, USA
| | - Eric Palmer
- Vero Beach Research Center, Syngenta Crop Protection, LLC, 7145 58th Avenue, Vero Beach, FL, 32967, USA
| | - Yan Zhang
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Nicholas Bate
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Liang Shi
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| | - Ian Jepson
- Syngenta Crop Protection, LLC, 9 Davis Drive, Research Triangle Park, Durham, NC, 27709-2257, USA
| |
Collapse
|