Breeding Science
Online ISSN : 1347-3735
Print ISSN : 1344-7610
ISSN-L : 1344-7610
Research papers
Multiple origins and high genetic diversity of cultivated radish inferred from polymorphism in chloroplast simple sequence repeats
Kyoko YamaneNa LüOhmi Ohnishi
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JOURNAL FREE ACCESS

2009 Volume 59 Issue 1 Pages 55-65

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Abstract

We analyzed 25 chloroplast simple sequence repeat (cpSSR) loci in 82 accessions, 59 of cultivated radish and 23 of three wild Raphanus species and identified 7 polymorphic loci and 20 haplotypes. The distribution of haplotypes in different species and different geographical areas was assessed. Minimum-spanning network (MSN) was used to identify phylogenetic relationships in cultivated and wild radish. The MSN provides evidence for at least three independent domestication events, including black Spanish radish and two distinct groups of cpSSR haplotypes. One of these two haplotype groups is restricted geographically to Asia. This led Asian cultivated radish haplotypes to higher cpSSR diversity than Mediterranean cultivated radish or wild radish. These data are consistent with the diversity and distribution of agronomic traits in cultivated radish. At the same time, this implies that Asian cultivated radish is not originated from the diffused descendants of European cultivated radish, probably originated from a wild species that is distinct from the wild ancestor of European cultivated radish. Unfortunately we do not know the wild ancestor of Asian cultivated radish.

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© 2009 by JAPANESE SOCIETY OF BREEDING
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