Journal
ANALYTICAL BIOCHEMISTRY
Volume 375, Issue 1, Pages 150-152Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2007.11.022
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A TaqMan quantitative real-time PCR detection system was developed to examine transgene copy number in cotton. Gh UBC1, a gene validated to be present as a single copy per haploid Gossypium hirsutum genome, was used as the endogenous reference to estimate copy number of GFP and selection marker NPTII in 28 TO plants. This system was found to be more accurate than genomic Southern blot hybridization and could effectively tell homozygotes from heterozygotes in a T1 transgenic cotton population. Therefore it is suitable for efficient and cost effective early screening of transgenic seedlings and identifying transgene homozygotes in segregation populations. (C) 2007 Elsevier Inc. All rights reserved.
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