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Distribution of the 241 bp deletion of chloroplast DNA in wild potato species

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Abstract

The common potato (Solanum tuberosum L. ssp.tuberosum) has T-type chloroplast DNA characterized by a 241 bp deletion. To explore the maternal ancestry of the common potato, a total of 566 accessions of 35 wild species, collected mostly from central Bolivia to northern Argentina, were determined for presence or absence of the deletion by a simple PCR assay using primers flanking the deleted region of chloroplast DNA. Sixteen out of 80 accessions ofS. tarijense, S. berthaultii, andS. neorossii showed a shorter PCR amplified fragment. Sequencing of these fragments revealed that the same 241 bp was deleted at the same position in these accessions. This strongly suggests that the deletion event had occurred in wild species.

Resumen

La papa común (Solanum tuberosum L. ssp.Tuberosum) tiene ADN cloroplástico del tipo T caracterizado por una deleción de 241 pb (pares de base). Para explorar el ancestro materno de la papa común, se determinó la presencia o ausencia de deleción en un total de 566 accesiones de 35 especies silvestres, la mayor parte de las cuales fueron colectadas desde Bolivia central hasta el norte de Argentina, mediante una prueba simple de PCR (reacción en cadena de la polimerasa) usando cebadores a cada lado de la región con deleción de ADN cloroplástico. Dieciséis de 80 accesiones deS. tarijense, S. berthaultii y S. neorossii mostraron un fragmento amplificado de PCR más corto. La secuenciación de esos fragmentos reveló que los mismos pb 241 fueron eliminados en la misma posición en esas accesiones. Esto sugiere palmariamente que en las especies silvestres había ocurrido el evento de deleción.

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Correspondence to Kazuyoshi Hosaka.

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Hosaka, K. Distribution of the 241 bp deletion of chloroplast DNA in wild potato species. Am. J. Pot Res 79, 119–123 (2002). https://doi.org/10.1007/BF02881520

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  • DOI: https://doi.org/10.1007/BF02881520

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