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Genetic diversity of the andean tuber crop species Ullucus tuberosus as revealed by molecular (ISSR) and morphological markers

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Abstract:

Genetic diversity of ulluco (Ullucus tuberosus), maintained ex situ and originating from Peru and North Bolivia, has been analysed using morphological traits and inter-simple sequence repeat (ISSR) markers, along with passport data. With regard to morphological and ISSR variation, our study revealed a high number of morphotypes and genotypes. Morphological and molecular results were congruent and both correlated with geographical distribution. Moreover, comparison of molecular and morphological characterisation of accessions indicated the existence of intra-morphotype heterogeneity. We discuss the genetic structure of ulluco in relation to characteristics of the species and of the Andean agricultural system. Patterns of diversity probably have a geographical origin and have been modified for centuries by Andean farmers, at small and large scales. The fact that both morphological and molecular markers correlate with geographic distribution is of high interest for genetic diversity studies and for genetic resource conservation of Andean tubers and of other vegetatively propagated crop species.

Keywords: ANDEAN TUBER; GENETIC DIVERSITY; ISSR; MOLECULAR MARKERS; MORPHOLOGICAL MARKERS; ULLUCUS TUBEROSUS

Document Type: Regular Paper

Publication date: September 1, 2009

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  • The Belgian Journal of Botany (now known as Plant Ecology and Evolution) is an international journal open to all fields of plant sciences. Please note, however, that papers restricted to purely nomenclatural matters or to floristical data of only local interest will not be accepted. The Journal appears in one volume of two issues per year. It publishes reviews, original research papers, short notes, letters to the editor, and book reviews. Click here for current issues of this journal
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