Graham NJSuontama MPleasants TLi YBader MKFKlápště JDungey HSWilliams NM2024-10-032024-10-032018-06-27Graham NJ, Suontama M, Pleasants T, Li Y, Bader MKF, Klápště J, Dungey HS, Williams NM. (2018). Assessing the genetic variation of tolerance to red needle cast in a Pinus radiata breeding population. Tree Genetics and Genomes. 14. 4.1614-2942https://mro.massey.ac.nz/handle/10179/71595Breeding for disease resistance or tolerance is a viable option for disease management programmes and is important for the continued success and resilience of planted forests. Red needle cast (RNC) is a disease that affects radiata pine (Pinus radiata) and is caused by Phytophthora pluvialis. Knowledge is still very limited regarding the potential for genetic tolerance to this pathogen. The application of controlled screening techniques is clearly required. Using a detached needle assay, we screened 392 clonally replicated individuals (clones) from an elite P. radiata population for quantitative tolerance to RNC. Data was highly skewed and required logarithmic data transformation and Poisson distributions for the estimation of best linear unbiased predictions. These estimates revealed a broad range in susceptibility/tolerance to RNC, and enabled the identification of clones that were clearly susceptible and clones that were clearly tolerant. There was a high correlation between the number and length of lesions that developed in response to inoculation with P. pluvialis. Broad-sense heritability estimates were low to moderate, indicating that there is potential for improving tolerance through breeding. These results provide evidence that breeding for tolerance to P. pluvialis is possible, although continued work into understanding and minimising causes for variance are required.(c) 2018 The Author/sCC BY 4.0https://creativecommons.org/licenses/by/4.0/Radiata pineDiseasePhytophthora pluvialisTree breedingDetached needle assayScreening systemsJournal article10.1007/s11295-018-1266-91614-2950journal-articlehttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000436785400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fefARTN 55