Home Publications Tree Improvement and Genetics Southern Forest Tree Improvement Conference 24th Southern Forest Tree Improvement Conference (1997) Derivation of Host and Pathogen Genotypes in the Fusiform Rust Pathosystem on Slash Pine Using a Complimentary Genetics Model and Diallel Data

Derivation of Host and Pathogen Genotypes in the Fusiform Rust Pathosystem on Slash Pine Using a Complimentary Genetics Model and Diallel Data

The homozygous dominant reaction gene of parent 8-7 at locus 1, complemented by the homozygous dominant avirulence gene in culture WLP-10, is thought to be the reason that families with 8-7 as one of the parents appear to be so "resistant" when challenged with WLP-10. Two additional complementary gene pairs can be hypothesized if the May data is included for families 9-2 x 18-26 and 18-27 x 18-26. The identification of these gene pairs using both the May and July inoculation data suggest the existence of temperature-sensitive genes in this pathosystem. A Chi-square analysis of the July inoculation data using a complementary model with four gene pairs indicate a good fit between expected and observed percentage infection levels. The implications of these findings on rust screening and deployment are discussed.


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Author(s): Henry E. Stelzer, R. L. Doudrick, Thomas L. Kubisiak, C. Dana Nelson

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1997

Section: Contributed Presentations: Full Papers

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