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QTL and eQTL mapping associated with host response to Candidatus Liberibacter asiaticus in citrandarins
Tropical Plant Pathology ( IF 1.5 ) Pub Date : 2020-05-29 , DOI: 10.1007/s40858-020-00372-7
Tatiany Aparecida Teixeira Soratto , Maiara Curtolo , Samanta Marengo , Ana Lúcia Dezotti , Rômulo Pedro Macêdo Lima , Rodrigo Gazaffi , Marcos Antonio Machado , Mariângela Cristofani-Yaly

Huanglongbing (HLB) is a severe disease of citrus caused by the bacterium Candidatus Liberibacter. In America, the most common species is Candidatus Liberibacter asiaticus (CLas). In a previous study of the Citrus-HLB pathosystem, our group found differences in CLas multiplication in a population of hybrids obtained by hybridization between Citrus sunki Hort. Ex Tan. and Poncirus trifoliata (L.) Raf. cv. Rubidoux. The bacterial concentration was higher in C. sunki than in P. trifoliata. Thus, this study aims to map phenotypic (QTL) and gene expression (eQTL) data associated with host response to CLas in the linkage groups (LGs) of the previously constructed parental maps of C. sunki and P. trifoliata cv. Rubidoux. For the phenotypic analysis, we used a population of 79 F1 hybrids (termed citrandarins) between C. sunki and P. trifoliata. CLas and starch were quantified in the leaves of the plants two years after pathogen inoculation, allowing the classification of hybrids as resistant, tolerant, and susceptible. The expression of 14 candidate genes was measured in 72 hybrids of the population and used as expression data for the eQTL mapping. We located nine QTL and 52 eQTL in the C. sunki map and 17 QTL and 40 eQTL in the P. trifoliata map. The overlap of eQTL of the majority of genes with QTL from the phenotypic data indicates that the genes are related to the phenotype and are probably related to pathogen infection.

中文翻译:

QTL 和 eQTL 定位与宿主对柑橘中念珠菌的反应相关

黄龙病(HLB)是由念珠菌引起的严重柑橘病害。在美国,最常见的物种是 Candidatus Liberibacter asiaticus (CLas)。在之前对 Citrus-HLB 病理系统的研究中,我们小组发现了通过 Citrus sunki Hort 杂交获得的杂交群体中 CLas 增殖的差异。前谭。和 Poncirus trifoliata (L.) Raf。简历。鲁比都。C. sunki 中的细菌浓度高于 P. trifoliata。因此,本研究旨在绘制与先前构建的 C. sunki 和 P. trifoliata cv. 亲本图谱的连锁群 (LGs) 中 CLas 的宿主反应相关的表型 (QTL) 和基因表达 (eQTL) 数据。鲁比都。对于表型分析,我们使用了 C. sunki 和 P. trifoliata 之间的 79 个 F1 杂种(称为柑橘)。病原体接种两年后,对植物叶片中的 Clas 和淀粉进行定量,从而将杂种分类为抗性、耐受性和易感性。在群体的 72 个杂种中测量了 14 个候选基因的表达,并将其用作 eQTL 定位的表达数据。我们在 C. sunki 图中定位了 9 个 QTL 和 52 个 eQTL,在 P. trifoliata 图中定位了 17 个 QTL 和 40 个 eQTL。大多数基因的 eQTL 与表型数据中的 QTL 重叠表明这些基因与表型有关,可能与病原体感染有关。在群体的 72 个杂种中测量了 14 个候选基因的表达,并将其用作 eQTL 定位的表达数据。我们在 C. sunki 图中定位了 9 个 QTL 和 52 个 eQTL,在 P. trifoliata 图中定位了 17 个 QTL 和 40 个 eQTL。大多数基因的 eQTL 与表型数据中的 QTL 重叠表明这些基因与表型有关,可能与病原体感染有关。在群体的 72 个杂种中测量了 14 个候选基因的表达,并将其用作 eQTL 定位的表达数据。我们在 C. sunki 图中定位了 9 个 QTL 和 52 个 eQTL,在 P. trifoliata 图中定位了 17 个 QTL 和 40 个 eQTL。大多数基因的 eQTL 与表型数据中的 QTL 重叠表明这些基因与表型有关,可能与病原体感染有关。
更新日期:2020-05-29
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