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Journal of Heredity 2003:94(2)
© 2003 The American Genetic Association 94:185-189

Brief Communication

The Development of Two Flanking SCAR Markers Linked to a Sex Determination Locus in Salix viminalis L

L. E. Gunter, G. T. Roberts, K. Lee, F. W. Larimer, and G. A. Tuskan

From the Environmental Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831–6422 (Gunter, Roberts, Lee, and Tuskan) and the Life Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN (Larimer).

Address correspondence to L. E. Gunter at the address above, or e-mail: gunterle{at}ornl.gov.

Most studies of sex determination systems in plants involve dioecious annuals that have known sex chromosomes. Despite the absence of such structures in the majority of dioecious plants, gender seems to be under relatively strict genetic control in some species. Genetic markers linked to a female sex-determination locus in Salix viminalis L. have been discovered through bulked segregant analysis of three full-sib families using approximately 1,000 arbitrary primers. Two RAPD markers that were present in the common female parent as well as in predominantly female progeny of these families were subsequently sequenced and converted to sequence characterized amplified region (SCAR) markers. The two SCAR markers are correlated with gender in the three full-sib families and are present in 96.4% of the female progeny and 2.2% of the males, providing evidence of linkage to a putative female-specific locus associated with gender determination in S. viminalis. Estimates of recombination suggest that the two markers are flanking a putative sex determination locus, SDL-II, in certain families of S. viminalis.


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