Title:	Transgene elimination in genetically modified dry bean and soybean lines.
Authors:	ROMANO, E. SOARES, A. PROITE, K. NEIVA, S. GROSSI, M. FARIA, J. C. RECH, E. L. ARAGÃO, F. J. L.
Affiliation:	EDUARDO ROMANO DE CAMPOS PINTO, Cenargen; ALEXANDRE SOARES; KARINA PROITE; SUZANA NEIVA; MAIRA GROSSI; JOSIAS CORREA DE FARIA, CNPAF; ELIBIO LEOPOLDO RECH FILHO, Cenargen; FRANCISCO JOSE LIMA ARAGAO, Cenargen.
Date Issued:	2005
Citation:	Genetics and Molecular Research, v. 4, n. 2, p. 177-184, 2005.
Description:	Transgene elimination is a poorly studied phenomenon in plants. We made genetic and molecular studies of a transgenic dry bean line immune to bean golden mosaic geminivirus and a soybean line. In both lines, the transgenes were stable during the vegetative phase but were eliminated during meiosis. Due to its potential biotechnological value, this transgenic line was micropropagated by grafting and the vegetative copies were studied for more than two years. More than 300 plants of progeny were obtained during this period, demonstrating that the phenomenon of elimination was consistently repeated and offering an opportunity for detailed study of transgene elimination, including the characterization of the integration sites. Cloning and sequencing of the transgenic loci, reciprocal crosses to untransformed plants, genomic DNA blots, and GUS assays were performed in the transgenic lines. Based on the molecular and genetic characterization, possible mechanisms involved in transgene elimination include intrachromosomal recombination, genetic instability resulting from the tissue culture manipulations, and co-elimination of transgenes, triggered by a process of genome defense.
Thesagro:	Feijão Phaseolus Vulgaris
NAL Thesaurus:	biolistics
Keywords:	Transgene elimination
ISSN:	1676-5680
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPAF)