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DIGITAL.CSIC
Doctoral thesis . 2011 . Peer-reviewed
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Análisis de la diversidad genética en melocotonero [P. persica (L.) Batsch] y en patrones del género Prunus

Authors: Bouhadida, Mariem;

Análisis de la diversidad genética en melocotonero [P. persica (L.) Batsch] y en patrones del género Prunus

Abstract

[EN] In this study, we characterised 30 peach cultivars originated from a local area in Aragón (Spain) (19 are described as clones of the ‘Miraflores’ peach variety) using 20 SSR primer pairs developed in peach. All markers amplified an average of 2.3 alleles per locus, and identified 16 genotypes from the 30 studied, while 14 (clones of ‘Miraflores) showed the same genetic profile. Moreover, we characterised a sample of 94 peach cultivars from the national collection composed of 64 local Spanish peach and 30 cultivars from modern breeding programs. For this aim, we used a set of 15 microsatellite markers selected for their high polymorphism from published sequences. An average of 6.7 alleles per locus was amplified with all SSRs, expressing a high genetic diversity within the 94 cultivars studied. High genetic distances were observed when comparing non-melting peach cultivars with melting ones, and especially between Spanish non-melting peaches and the rest of cultivars. Only eight SSRs from the 15 used in this study, were able to distinguish unambiguously all the cultivars studied. In this study, a characterisation of Prunus species and rootstocks (interspecific hybrids) was also carried out, on the basis of nuclear and chloroplast DNA analyses using SSRs and the PCR-RFLP, respectively. A set of 20 SSRs was used to characterize 44 Prunus rootstocks belonging to three groups: Peach-based rootstocks; Myrobalan-Marianna plums; and Slow growing plums. SSRs in this case showed a high level of polymorphism and amplified an average of 16 alleles per locus, allowing the total identification of all rootstocks.

[ES] En este trabajo, se han caracterizado 30 cultivares de melocotonero procedentes de un mismo área de cultivo en Aragón (19 de los 30 cultivares son supuestos clones de una misma variedad: ‘Miraflores’), utilizando 20 marcadores microsatélites (SSRs) desarrollados en melocotonero. Todos los marcadores amplificaron un valor medio de 2,3 alelos por locus, y permitieron la identificación de 16 genotipos de los 30 estudiados, mientras que 14 clones de ‘Miraflores’ mostraron el mismo perfil genético para todos los loci. Por otra parte, se ha caracterizado un conjunto de 94 cultivares de melocotonero pertenecientes al banco de germoplasma español, de referencia nacional de melocotonero, que incluye 64 cultivares locales españoles y 30 cultivares procedentes de programas de mejora internacionales. Se eligieron 15 marcadores SSRs, seleccionados por su alto nivel de polimorfismo en melocotonero. Se obtuvo un valor medio de 6,7 alelos por locus con todos los marcadores, mostrando así una alta diversidad genética entre los 94 cultivares estudiados. Se ha observado una mayor distancia genética entre los melocotones de carne dura y los melocotones de carne blanda, y principalmente entre los melocotones españoles de carne dura y el resto de los cultivares. Con sólo 8 de los 15 SSRs utilizados en este trabajo, se pueden distinguir correctamente todos los cultivares estudiados. En este estudio, se han caracterizado mediante los marcadores SSRs y la PCR-RFLP, especies y patrones (híbridos ínterespecíficos) de Prunus, basándose en el análisis del ADN nuclear y cloroplástico, respectivamente.

Peer reviewed

183 Pag.

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Spain
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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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