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Vicient CM, Suoniemi A, Anamthawat-Jónsson K, et al. Retrotransposon BARE-1 and Its Role in Genome Evolution in the Genus Hordeum. Plant Cell. 1999;11(9):1769-1784doi: 10.1105/tpc.11.9.1769.
Vicient, C. M., Suoniemi, A., Anamthawat-Jónsson, K., Tanskanen, J., Beharav, A., Nevo, E., & Schulman, A. H. (1999). Retrotransposon BARE-1 and Its Role in Genome Evolution in the Genus Hordeum. The Plant cell, 11(9), 1769-1784. https://doi.org/10.1105/tpc.11.9.1769
Vicient, et al. "Retrotransposon BARE-1 and Its Role in Genome Evolution in the Genus Hordeum." The Plant cell vol. 11,9 (1999): 1769-1784. doi: https://doi.org/10.1105/tpc.11.9.1769
Vicient CM, Suoniemi A, Anamthawat-Jónsson K, Tanskanen J, Beharav A, Nevo E, Schulman AH. Retrotransposon BARE-1 and Its Role in Genome Evolution in the Genus Hordeum. Plant Cell. 1999 Sep;11(9):1769-1784. doi: 10.1105/tpc.11.9.1769. PMID: 10488242; PMCID: PMC144304.
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Plant Cell. 1999 Sep;11(9):1769-1784. doi: 10.1105/tpc.11.9.1769.

Retrotransposon BARE-1 and Its Role in Genome Evolution in the Genus Hordeum.

The Plant cell

Vicient, Suoniemi, Anamthawat-Jónsson, Tanskanen, Beharav, Nevo, Schulman

Affiliations

  1. Institute of Biotechnology, Viikki Biocenter, University of Helsinki, P.O. Box 56, Viikinkaari 9, FIN-00014 Helsinki, Finland.

PMID: 10488242 PMCID: PMC144304 DOI: 10.1105/tpc.11.9.1769

Abstract

The replicative retrotransposon life cycle offers the potential for explosive increases in copy number and consequent inflation of genome size. The BARE-1 retrotransposon family of barley is conserved, disperse, and transcriptionally active. To assess the role of BARE-1 in genome evolution, we determined the copy number of its integrase, its reverse transcriptase, and its long terminal repeat (LTR) domains throughout the genus Hordeum. On average, BARE-1 contributes 13.7 x 10(3) full-length copies, amounting to 2.9% of the genome. The number increases with genome size. Two LTRs are associated with each internal domain in intact retrotransposons, but surprisingly, BARE-1 LTRs were considerably more prevalent than would be expected from the numbers of intact elements. The excess in LTRs increases as both genome size and BARE-1 genomic fraction decrease. Intrachromosomal homologous recombination between LTRs could explain the excess, removing BARE-1 elements and leaving behind solo LTRs, thereby reducing the complement of functional retrotransposons in the genome and providing at least a partial "return ticket from genomic obesity."

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