Genetic diversity of apricot revealed by a set of SSR markers from linkage group G1

A. Pedryc, Szabolcs Ruthner, Rita Hermán, Boris Krska, A. Hegedüs, Júlia Halász

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Eight polymorphic simple sequence repeat (SSR) markers located in the G1 linkage group of apricot (Prunus armeniaca L.) were previously developed and evaluated in a small set of cultivars. Those primers were used for studying variability in 77 apricot cultivars belonging to five different geographical groups, such as Chinese, Asian (Irano-Caucasian and Central Asian), North American, Mediterranean and Western European as well as Middle European cultivars. Six of the markers were polymorphic and revealed a total of 71 alleles ranging from 5 (aprigms11) to 20 (aprigms1) alleles per locus with a mean value of 11.83 alleles per locus. In conclusion, the SSR loci located in the G1 linkage group show a level of polymorphism which is similar to loci dispersed throughout the entire genome. The total number of alleles and the number of unique alleles were the highest in Chinese apricots and the lowest in Middle European cultivars. Heterozygosity also showed a decrease from Asia and China to Middle Europe. No association could have been observed between any SSR markers tested and plum pox virus (PPV) resistant phenotype of cultivars. PPV resistant cultivars did not form a separate clade on the dendrogram obtained by UPGMA cluster analysis. Middle European and Chinese cultivars formed separate clusters while other genotypes formed smaller multiple sub-groups or scattered among different clusters. Our results support previous hypotheses on the origin of PPV resistance in North American apricots. The allele data was also presented in a form that allowed the easy observation of allele frequencies in each geographical group at each locus. Using this data field, differences and similarities between cultivar groups can be easily assessed. The analysis demonstrated the links between the North American and Mediterranean apricot germplasm and confirmed that the Chinese and Eastern European cultivars are distantly related.

Original languageEnglish
Pages (from-to)19-26
Number of pages8
JournalScientia Horticulturae
Volume121
Issue number1
DOIs
Publication statusPublished - Jun 2 2009

Fingerprint

apricots
linkage groups
microsatellite repeats
genetic variation
cultivars
alleles
Plum pox virus
loci
Prunus armeniaca
gene frequency
cluster analysis
heterozygosity
germplasm
genetic polymorphism
phenotype
genome
China
genotype

Keywords

  • Apricot
  • Breeding
  • Genetic variation
  • Microsatellite
  • Molecular markers
  • Prunus armeniaca
  • SSR

ASJC Scopus subject areas

  • Horticulture

Cite this

Genetic diversity of apricot revealed by a set of SSR markers from linkage group G1. / Pedryc, A.; Ruthner, Szabolcs; Hermán, Rita; Krska, Boris; Hegedüs, A.; Halász, Júlia.

In: Scientia Horticulturae, Vol. 121, No. 1, 02.06.2009, p. 19-26.

Research output: Contribution to journalArticle

Pedryc, A. ; Ruthner, Szabolcs ; Hermán, Rita ; Krska, Boris ; Hegedüs, A. ; Halász, Júlia. / Genetic diversity of apricot revealed by a set of SSR markers from linkage group G1. In: Scientia Horticulturae. 2009 ; Vol. 121, No. 1. pp. 19-26.
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