Small-scale genetic diversity in oneseed hawthorn (<Emphasis Type="Italic">Crataegus monogyna</Emphasis> Jacq.) |
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Authors: | D Ferrazzini I Monteleone P Belletti |
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Institution: | (1) DIVAPRA Plant Genetics and Breeding, University of Turin, via Leonardo da Vinci 44, 10095 Grugliasco, Italy |
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Abstract: | We have examined the pattern of random amplified polymorphic DNA (RAPD) variation among six populations of Crataegus monogyna from northern Italy, extending over an area of about 20,000 km2. The aim was to evaluate local differentiation in relation to geographical distance. Of the 73 loci analysed, 65 were polymorphic,
and there were no bands at complete fixation at the population level. The mean genetic diversity was 0.291, with the values
for individual populations ranging between 0.252 and 0.333. According to the analysis of molecular variance most of the genetic
variation was found within populations (about 80%), with a significant proportion being attributable to genetic differences
between populations. No evidence for isolation by distance was found in the set of populations sampled. The efficacy of RAPD
markers in analysing genetic variation, and the contribution of the results in terms of the preservation of biodiversity and
defining the most appropriate strategies for collecting forest reproductive material, are discussed. |
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Keywords: | Crataegus Rosaceae Genetic differentiation Northern Italy Oneseed hawthorn RAPD markers |
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