Survey of Poncirus trifoliata hybrids for resistance to colonization by Asian citrus psyllid

  • David G. Hall USDA-ARS, U.S. Horticultural Research Laboratory, 2001 South Rock Road, Ft. Pierce, Florida 34945, USA
  • Chandrika Ramadugu University of California, 900 University Avenue, Riverside, California 92521, USA
  • Matthew G Hentz USDA-ARS, U.S. Horticultural Research Laboratory, 2001 South Rock Road, Ft. Pierce, Florida 34945, USA
  • Fred G Gmitter University of Florida, Citrus Research & Education Center, 700 Experiment Station Road, Lake Alfred, Florida 33850, USA
  • Ed Stover USDA-ARS, U.S. Horticultural Research Laboratory, 2001 South Rock Road, Ft. Pierce, Florida 34945, USA

Abstract

Genetic traits in Poncirus trifoliata (Rutaceae) are known to confer resistance to colonization by the Asian citrus psyllid, but field surveys indicated these traits were not expressed in any of 24 simple hybrids between P. trifoliata and sweet orange. No resistance to colonization by the psyllid was observed in 14 other types of P. trifoliata hybrids. Three citrumelo hybrids appeared to be resistant in 1 survey, but in another survey, none of 6 citrumelos exhibited resistance. Interestingly, colonization was somewhat reduced on a hybrid with P. trifoliata in the pedigree of both parents, suggesting the possibility that traits suppressing oviposition may be recovered through similar crosses.

 

Sumario

Se sabe que los rasgos genéticos en Poncirus trifoliata (Rutaceae) confieren resistencia a la colonización por parte del psílido asiático de los cítricos, pero los sondeos de campo indicaron que estos rasgos no se expresaron en ninguno de los 24 híbridos simples entre P. trifoliata y naranja dulce. No se observó resistencia a la colonización por el psílido en otros 14 tipos de híbridos de P. trifoliata. Tres híbridos de citrumelo parecieron ser resistentes en 1 sondeo, pero en otro sondeo, ninguno de los 6 citrumelos mostró resistencia. Curiosamente, la colonización se redujo algo en un híbrido con P. trifoliata en el pedigrí de ambos parientes, lo que sugiere la posibilidad de que los rasgos que suprimen la oviposición puedan recuperarse a través de cruces similares.

Key Words: citrus greening; huanglongbing; Diaphorina citri; Liberibacter

View this article in BioOne

Published
2019-09-29
Section
Scientific Notes