Genetic diversity of carrot (<Emphasis Type="Italic">Daucus carota</Emphasis> L.) cultivars revealed by analysis of SSR loci |
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| Authors: | Rafal Baranski Anna Maksylewicz-Kaul Thomas Nothnagel Pablo F Cavagnaro Philipp W Simon Dariusz Grzebelus |
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| Institution: | 1.Department of Genetics, Plant Breeding and Seed Science,University of Agriculture in Krakow,Krakow,Poland;2.Institute for Breeding Research on Horticultural and Fruit Crops, Federal Research Centre for Cultivated Plants—Julius Kühn-Institut,Quedlinburg,Germany;3.USDA-ARS Vegetable Research Crops Unit, Department of Horticulture,University of Wisconsin-Madison,Madison,USA;4.Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria La Consulta,Mendoza,Argentina;5.Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET),Buenos Aires,Argentina |
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| Abstract: | Polymorphism of simple sequence repeat (SSR) loci was assessed in a collection of 88 carrot (Daucus carota L. subsp. sativus Hoffm.) accessions. The collection comprised cultivars and landraces mainly from Asia, Europe, and North America. Plants
were grown in the glasshouse and characterized for root color and shape. Thirty SSR loci were fully characterized using parameters
derived from allele frequencies, i.e. the number of total, effective and rare alleles, the observed and expected heterozygosity,
and fixation index. Using a Bayesian approach, two clusters of 17 and 61 accessions were distinguished, which comprised the
Asian and Western type accessions, respectively. Genetic diversity of the Asian gene pool was higher than that of the Western
gene pool. The results of SSR analysis were supported by morphological characterization, and are congruent with current knowledge
on the history of carrot domestication and breeding. |
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