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Genetics of Resistance to Phytophthora cinnamomi in Chestnut

Phytophthora cinnamomi is the causal agent of ink disease, a deadly root-rot in susceptible chestnut trees. Finding non-lethal methods of selecting Phytophthora- resistant parent trees is emerging as an important issue to The American Chestnut Foundation. Current research involves using molecular genetic markers to verify the type of inheritance of Phytophthora resistance in chestnut and to develop a map of the resistance locus(i). If successful, this work will yield a reliable, non-lethal method of identifying Phytophthora-resistant seedlings; this knowledge is needed to design and implement resistance screening strategies aimed at developing breeding lines of American chestnut (Castanea dentata) that are resistant to both blight (caused by Cryphonectria parasitica) and Phytophthora.


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Author(s): Mollie E. Bowles, John L. Frampton

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 2005