Development and characterization of polymorphic microsatellite markers for the sweet orange (Citrus sinensis L. Osbeck)

• Published in: Genetics and molecular biology Vol. 29; no. 1; pp. 90 - 96
• Main Authors: Novelli, Valdenice M., Cristofani, Mariangela, Souza, Alessandra A., Machado, Marcos A.
• Format: Journal Article
• Language: English; Portuguese
• Published: Sociedade Brasileira de Genética 2006
• Subjects: BIOCHEMISTRY & MOLECULAR BIOLOGY; Citrus sinensis; citrus species; GENETICS & HEREDITY; germplasm bank; Lima lima; molecular markers; polymorphism; citrus species; polymorphism; molecular markers; germplasm bank
• ISSN: 1415-4757; 1678-4685; 1415-4757; 1678-4685
• DOI: 10.1590/S1415-47572006000100018

The aims of this study were to develop simple sequence repeat markers (SSRs or microsatellite markers) in citrus and to evaluate the efficiency of these markers for characterization of sweet orange. We developed SSRs from a genomic library of 'Pera IAC' sweet orange enriched for AG/TC, GT/CA, TCA/AGT and AAC/TTG sequence repeats. We selected 279 sequences from which 171 primer pairs were designed of which 113 with the best banding patterns were selected. Characterization of sweet orange microsatellite loci revealed that AG/TC was the most abundant (69%) microsatellite class isolated, followed by GT/CA (15.9%), TCA/AGT (8%) and AAC/TTG (6.2%). The number of alleles ranged from 1 to 4, with a mean of 2 alleles per locus. Four microsatellite loci developed in this study were found to be useful for sweet orange DNA typing. The data obtained from microsatellites loci considered polymorphic will be useful as tools in the selection of zygotic and nucellar plants, identification of seedlings etc. for the cultivars Pera IAC, Lanceta, Pera GS 2000, Lamb Summer, Lima, Lima Tardia, Lima Verde, Mimo do Ceu, Valencia Folha Murcha, Valencia Folha Concha, Natal Murcha, Sanginea and Baia Gigante.