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ARS Home » Pacific West Area » Davis, California » Nat'l Clonal Germplasm Rep - Tree Fruit & Nut Crops & Grapes » Research » Publications at this Location » Publication #257790
Title: Genetic diversity, structure and differentiation in cultivated walnut (juglans regia l.)

Author
item Aradhya, Mallikarjuna
item WOESTE, K - Purdue University
item VELASCO, DIANNE - University Of California

Submitted to: Acta Horticulturae
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/10/2009
Publication Date: 4/30/2010
Citation: Aradhya, M.K., Woeste, K., Velasco, D. 2010. Genetic Diversity, Structure and Differentiation in Cultivated Walnut (Juglans regia L.). Acta Horticulturae. 861:127-132.

Interpretive Summary: An analysis of genetic structure and differentiation in cultivated walnut (Juglans regia) using 15 microsatellite loci revealed a considerable amount of genetic variation with a mild genetic structure indicating five genetic groups corresponding to the centers of diversity within the home range of walnut in Eurasia. Despite the narrow genetic differentiation among groups accounting for only 10 to 15% of the total variation, the groups differed significantly with respect to frequency and composition of alleles for different loci. Moderate to high genetic variability with mild genetic structure is found to be ideal for association genetic analysis.

Technical Abstract: An analysis of genetic structure and differentiation in cultivated walnut (Juglans regia) using 15 microsatellite loci revealed a considerable amount of genetic variation with a mild genetic structure indicating five genetic groups corresponding to the centers of diversity within the home range of walnut in Eurasia. Despite the narrow genetic differentiation among groups accounting for only 10 to 15% of the total variation, the groups differed significantly with respect to frequency and composition of alleles for different loci. Moderate to high genetic variability with mild genetic structure is found to be ideal for association genetic analysis.