Screening Triploid Hybrids of 'Lakeland' Limequat for Resistance to Citrus Canker

Plant Disease
Z ViloriaJude W Grosser

Abstract

Resistance of citrus genotypes to Xanthomonas axonopodis pv. citri, the cause of Asiatic citrus canker (ACC), was evaluated by injection infiltration of 103 and 104 CFU/ml through stomates on the abaxial surface of immature leaves. Citrus genotypes for screening comprised two autotetraploids and nine triploid hybrids of 'Lakeland' limequat (Citrus aurantifolia × Fortunella japonica) and their progenitors ('Lakeland' limequat, the autotetraploids 'Femminello' lemon (Citrus limon) and 'Giant Key' lime (C. aurantifolia), and the somatic hybrids 'Key' [also known as 'Mexican'] lime + 'Valencia' orange and 'Hamlin' orange + 'Femminello' lemon). 'Meiwa' kumquat (Fortunella crassifolia) and 'Pineapple' sweet orange (C. sinensis) were used as known resistant and susceptible standards, respectively. Lesion number per inoculation site and bacterial population per lesion were recorded 15 to 19 days after inoculation. The assay was performed four times during a spring-summer-fall period under greenhouse conditions. Canker lesions were consistently produced by stomatal inoculation with 104 but not 103 CFU/ml. Susceptible and resistant genotypes were separated based on lesion number per inoculation site and bacterial population per lesion. S...Continue Reading

References

Apr 1, 2001·Plant Disease·Tim S SchubertWayne N Dixon

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Citations

Jan 23, 2019·Frontiers in Plant Science·Mayara M MurataJames H Graham
Jan 26, 2011·Molecular Plant-microbe Interactions : MPMI·Yinping GuoNian Wang
Oct 15, 2013·Physiologia Plantarum·Tirupaati Swaroopa Rani, Appa Rao Podile

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