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A long terminal repeat retrotransposon Cgret from the phytopathogenic fungus Colletotrichum gloeosporioides on cranberry

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Abstract

A repetitive DNA element cloned from the cranberry fruit rot pathogen Colletotrichum gloeosporioides has been characterized. Sequence data indicate that it is a long terminal repeat (LTR) retrotransposon of 7,916 base pairs. LTR of 544 base pairs occur at either end of an internal region of 6,828 base pairs. This element, designated Cgret (C. gloeosporioides retrotransposon), encodes two putative polypeptides which have high homology to the gag and pol genes of other fungal retrotransposons. The sequence and structure suggest that Cgret is a member of the gypsy group of LTR retrotransposons. The Cgret retrotransposon was present in all of the cranberry isolates of the fungus C. gloeosporioides from New Jersey and Massachusetts, but not in the cranberry isolates from Wisconsin or Chile. Polymorphisms were detected among field isolates of C. gloeosporioides from various hosts, using hybridization probes derived from the LTR and the reverse transcriptase domain of Cgret. The structural integrity of Cgret suggests that it is still a functional retrotransposon and may be used as a molecular marker to study the genetic diversity distribution of this fungal pathogen.

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Received: 21 December 1999 / Accepted: 19 August 2000

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Zhu, P., Oudemans, P. A long terminal repeat retrotransposon Cgret from the phytopathogenic fungus Colletotrichum gloeosporioides on cranberry. Curr Genet 38, 241–247 (2000). https://doi.org/10.1007/s002940000162

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  • DOI: https://doi.org/10.1007/s002940000162

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