Background: Huanglongbing (HLB) is currently one of the most devasting diseases in citrus plants worldwide. Resistance against its causal agent, Candidatus Liberibacter asiaticus (CLas), commercial Citrus species remains a challenge, even though they show differences CLas multiplication. Methods: A total 14 citrandarins and their parents (Sunki mandarin Poncirus trifoliata cv. Rubidoux) were to...