Abstract
Genetic relatedness inChaenomeles was studied by RAPD analysis in 42 plants representing accessions of three wild species and one hybrid taxon. Amplification with 17 primers yielded a total of 156 polymorphic RAPD bands. Estimates of genetic relatedness suggest thatC. cathayensis andC. japonica are the most distantly related species, and that the former is comparatively homogeneous.Chaenomeles speciosa, which may have arisen through hybridization betweenC. cathayensis andC. japonica, takes an intermediate position between these two species. Analysis of diagnostic bands demonstrate that neitherC. speciosa norC. ×superba has any bands that do not occur in at least one ofC. cathayensis orC. japonica. Moreover,C. speciosa and the partly overlapping taxonC. ×superba are comparatively heterogeneous, which is also in accordance with a hybrid origin. Intraspecific variation was studied mainly inC. japonica; plants obtained from different sources of material formed well separated groups in the cluster analysis.
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Bartish, I.V., Rumpunen, K. & Nybom, H. Genetic diversity inChaenomeles (Rosaceae) revealed by RAPD analysis. Pl Syst Evol 214, 131–145 (1999). https://doi.org/10.1007/BF00985735
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DOI: https://doi.org/10.1007/BF00985735