LR14AGR01 Laboratory of Genetic and Cereal Breeding, National Agronomic Institute of Tunisia, University of Carthage, Tunis 1082, Tunisia.
CRP-Wheat Septoria Precision Phenotyping Platform, Tunis 1082, Tunisia.
Genes (Basel). 2022 Feb 11;13(2):336. doi: 10.3390/genes13020336.
Tan spot (TS), caused by the fugus (), has gained significant importance in the last few years, thereby representing a threat to wheat production in all major wheat-growing regions, including Tunisia. In this context, we evaluated a Mediterranean collection of 549 durum wheat accessions under field conditions for resistance to over two cropping seasons in Jendouba (Tunisia), a hot spot for . The relative disease severities showed significant phenotypic variation from resistance to susceptibility. The correlation between disease scores over the two trials was significant, as 50% of the accessions maintained good levels of resistance (resistant-moderately resistant). Seedling and adult-stage reactions were significantly correlated. The ANOVA analysis revealed that the genotype term is highly significant at the adult stage, thus emphasizing the high genetic variability of the tested accessions. Reaction-type comparison among and between countries revealed a high diversity of TS resistance. Plant height (PH) was negatively correlated to disease scores, indicating that PH might either have a significant effect on TS severity or that it can be a potential disease escape trait. The evaluation of this collection allowed for the identification of potential diverse resistance sources to that can be incorporated in breeding programs.
条锈病（TS）由真菌（）引起，近年来受到高度重视，因此对包括突尼斯在内的所有主要小麦种植区的小麦生产构成了威胁。在这方面，我们在杰恩杜巴（突尼斯）的田间条件下评估了一个地中海地区的 549 个硬粒小麦品种，该地区是 的热点地区。相对疾病严重程度表现出从抗性到易感性的显著表型变异。两次试验的病害评分之间的相关性显著，其中 50%的品种保持了良好的抗性（抗性-中度抗性）。幼苗期和成株期反应显著相关。方差分析表明，成株期的基因型项高度显著，从而强调了所测试品种的高遗传变异性。国家间和国家内的反应类型比较显示出 TS 抗性的高度多样性。株高（PH）与病害评分呈负相关，表明 PH 可能对 TS 严重程度有显著影响，或者它可能是一种潜在的疾病逃避特性。该品种的评估确定了对 具有潜在多样性的抗性来源，这些来源可以纳入到育种计划中。
