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      Origin and evolution of Andigena potatoes revealed by chloroplast and nuclear DNA markers.

      1 ,
      Genome
      Canadian Science Publishing

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          Abstract

          Andigena potatoes (Solanum tuberosum L. subsp. andigena Hawkes) (2n = 4x = 48) are important, native-farmer-selected cultivars in the Andes, which form a primary gene pool for improving a worldwide grown potato (S. tuberosum subsp. tuberosum). To elucidate the origin of Andigena, 196 Andigena accessions were compared with 301 accessions of 33 closely related cultivated and wild species using several types of chloroplast DNA (ctDNA) markers and nuclear DNA (nDNA) restriction fragment length polymorphism (RFLP) markers. Fourteen ctDNA types (haplotypes) and 115 RFLP bands were detected in Andigena, of which the main haplotypes and frequent RFLP bands were mostly shared with a cultivated diploid species, S. stenotomum Juz. et Buk. Principal component analysis of nDNA polymorphisms revealed a progressive and continuous variation from Peruvian wild species with C-type ctDNA to a group of wild species having S-type ctDNA in its variation range (S. bukasovii, S. canasense, S. candolleanum, and S. multidissectum), to cultivated diploid potatoes (S. phureja and S. stenotomum), and to cultivated tetraploid potatoes (Andigena and Chilean S. tuberosum subsp. tuberosum). These results suggest that the initial Andigena population arose with multiple origins exclusively from S. stenotomum. The overall evolutionary process toward the present-day Andigena was discussed.

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          Author and article information

          Journal
          Genome
          Genome
          Canadian Science Publishing
          0831-2796
          0831-2796
          Jun 2006
          : 49
          : 6
          Affiliations
          [1 ] Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Japan.
          Article
          g06-014
          10.1139/g06-014
          16936843
          c8363265-6457-498b-88cd-1f864a4ce9d4
          History

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