Forests 2015, 6(8), 2739-2761; https://doi.org/10.3390/f6082739
Identification of Nine Pathotype-Specific Genes Conferring Resistance to Fusiform Rust in Loblolly Pine (Pinus taeda L.)
Henry V. Amerson 1,†, C. Dana Nelson 2,*
, Thomas L. Kubisiak 2,‡, E. George Kuhlman 3,†and Saul A. Garcia 4,‡
, Thomas L. Kubisiak 2,‡, E. George Kuhlman 3,†and Saul A. Garcia 4,‡1
Department of Forestry, North Carolina State University, 840 Main Campus Drive, 2500 Partners II Bldg., NCSU Centennial Campus, Raleigh, NC 27695, USA
2
USDA Forest Service, Southern Research Station, Southern Institute of Forest Genetics, 23332 Success Road, Saucier, MS 39574, USA
3
USDA Forest Service, Southern Research Station, 320 Green Street, Athens, GA 30602, USA
4
Industry Cooperative Tree Improvement Program, North Carolina State University, 1019 Biltmore Hall, Raleigh, NC 27695, USA
â€
Retired.
‡
Formerly employed at address noted above.
*
Author to whom correspondence should be addressed.
Academic Editor: Eric J. Jokela
Received: 12 June 2015 / Accepted: 19 July 2015 / Published: 7 August 2015
(This article belongs to the Special Issue Fusiform Rust Disease—Biology and Management of Resistance)
Abstract
Nearly two decades of research on the host-pathogen interaction in fusiform rust of loblolly pine is detailed. Results clearly indicate that pathotype-specific genes in the host interacting with pathogen avirulence cause resistance as defined by the non-gall phenotype under favorable environmental conditions for disease development. In particular, nine fusiform rust resistance genes (Fr genes) are described here including the specific methods to determine each and their localization on the reference genetic map of loblolly pine. Understanding how these and other apparent Fr genes in loblolly pine and other rust-susceptible pines impact resistance screening, parental and progeny selection, and family and clonal deployment is an important area in forest genetics research and operational tree breeding. The documentation of these Fr genes is a key piece of information towards gaining that understanding and ultimately improving breeding and deployment strategies. View Full-TextKeywords:
host-pathogen genetics; gene-for-gene interaction; resistance genes; Pinus taeda; Cronartium quercuum f.sp. fusiforme; fusiform rust; Fr genes; genetic markers
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MDPI and ACS Style
Amerson, H.V.; Nelson, C.D.; Kubisiak, T.L.; Kuhlman, E.G.; Garcia, S.A. Identification of Nine Pathotype-Specific Genes Conferring Resistance to Fusiform Rust in Loblolly Pine (Pinus taeda L.). Forests 2015, 6, 2739-2761.