naa a22 4500 510731279 CHVBK 20180411082953.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11295-012-0553-0 doi (NATIONALLICENCE)springer-10.1007/s11295-012-0553-0 Population structure and marker-trait associations for pomological traits in peach and nectarine cultivars [Elektronische Daten] [Carolina Font i Forcada, Nnadozie Oraguzie, Ernesto Igartua, María Moreno, Yolanda Gogorcena] Marker-trait associations based on populations from controlled crosses have been established in peach using markers mapped on the peach consensus map. In this study, we explored the utility of unstructured populations for association mapping to determine useful marker-trait associations in peach/nectarine cultivars. We used 94 peach cultivars representing local Spanish and modern cultivars from international breeding programs that are maintained at the Experimental Station of Aula Dei, Spain. This collection was characterized for pomological traits and was screened with 40 SSR markers that span the peach genome. Population structure analysis using STRUCTURE software identified two subpopulations, the local and modern cultivars, with admixture within both groups. The local Spanish cultivars were somewhat less diverse than modern cultivars. Marker-trait associations were determined in TASSEL with and without modelling coefficient of membership (Q) values as covariates. The results showed significant associations with pomological traits. We chose three markers on LG4 because of their proximity to the endoPG locus (freestone-melting flesh) that strongly affects pomological traits. Two genotypes of BPPCT015 marker showed significant associations with harvest date, flavonoids and sorbitol. Also, two genotypes of CPPCT028 showed associations with harvest date, total phenolics, RAC, and total sugars. Finally, two genotypes of endoPG1 showed associations with flesh firmness and total sugars. The analysis of linkage disequilibrium (LD) revealed a high level of LD up to 20cM, and decay at farther distances. Therefore, association mapping could be a powerful tool for identifying marker-trait associations and would be useful for marker-assisted selection in peach breeding. Springer-Verlag, 2012 Prunus persica nationallicence Germplasm nationallicence Population genetics nationallicence Linkage disequilibrium nationallicence Simple sequence repeats nationallicence Font i Forcada Carolina Departamento de Pomología, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut Oraguzie Nnadozie Irrigated Agriculture Research and Extension Center, Washington State University, 24106 N Bunn Road, 99350, Prosser, WA, USA aut Igartua Ernesto Departamento de Genética y Producción Vegetal, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut Moreno María Departamento de Pomología, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut Gogorcena Yolanda Departamento de Pomología, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut Tree Genetics & Genomes Springer-Verlag 9/2(2013-04-01), 331-349 1614-2942 9:2<331 2013 9 11295 https://doi.org/10.1007/s11295-012-0553-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11295-012-0553-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Font i Forcada Carolina Departamento de Pomología, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut NATIONALLICENCE 700 1- Oraguzie Nnadozie Irrigated Agriculture Research and Extension Center, Washington State University, 24106 N Bunn Road, 99350, Prosser, WA, USA aut NATIONALLICENCE 700 1- Igartua Ernesto Departamento de Genética y Producción Vegetal, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut NATIONALLICENCE 700 1- Moreno María Departamento de Pomología, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut NATIONALLICENCE 700 1- Gogorcena Yolanda Departamento de Pomología, Estación Experimental de Aula Dei-CSIC, P.O. Box 13034, 50080, Zaragoza, Spain aut NATIONALLICENCE 773 0- Tree Genetics & Genomes Springer-Verlag 9/2(2013-04-01), 331-349 1614-2942 9:2<331 2013 9 11295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer