Phytophthora infestans (Mont.) de Baryis found in all areas of potato (Solanum tuberosum L.) production in Argentine. Association mapping uses the existing diversity in a a population to identify loci responsible of phenotypic variation of a character. The studied population was formed by 159 genotypes of the germplasm collection of the Instituto Nacional de Tecnología Agropecuaria (INTA) Estación Experimental Agropecuaria (EEA) Balcarce potato breeding program. These genotypes are part of a larger population that was previously analyzed using single-nucleotide polymorphism (SNP). Phenotypic assessment was carried out in two locations over 3 yr. Environmental conditions allowed the presence of the disease in all year × location combination. Phenotypic variability was found for relative area under disease progress curve (RAUDPC) and yield parameters as, Total weight and Seed weight. Association mapping was carried out on 159 genotypes. Eight significant associations were found using Bonferroni methodology, with values of −log(p) ranging between 4.61 and 5.42 located at chromosomes 3 (solcap_snp_c2_16679), 4 (solcap_snp_c1_6126 and solcap_snp_c2_38243, solcap_snp_c2_54077), 5 (solcap_snp_c2_42374), 6 (solcap_snp_c2_33228), 7 (solcap_snp_c1_7407), and 10 (solcap_snp_c2_63) and eleven significant associations using permutation tests with values of −log(p) between 4.5 and 6.42 located at chromosomes 1(solcap_snp_c1_5150), 2 (solcap_snp_c1_13923), 4 (solcap_snp_c1_4178, and solcap_snp_c2_50004), 5 (solcap_snp_c2_11829 and solcap_snp_c2_50532), 7 (solcap_snp_c2_35057 and solcap_snp_c1_10011), and 9 (solcap_snp_c2_1915). Some of the SNPs detected are adjacent to genes that encode enzymes that participate in metabolic pathways that are activated in response to interaction with pathogens. Those markers might be included in breeding programs related to improve late blight resistance in potato cultivars.

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关联作图检测四倍体马铃薯致病疫霉抗性

在马铃薯 ( Solanum tuberosum ) 的所有区域都发现了致病疫霉(Mont.) de BaryisL.) 在阿根廷生产。关联映射使用 aa 群体中的现有多样性来识别负责字符表型变异的基因座。所研究的种群由国家农业技术研究所 (INTA) Estación Experimental Agropecuaria (EEA) Balcarce 马铃薯育种计划的种质资源收集的 159 个基因型组成。这些基因型是先前使用单核苷酸多态性 (SNP) 分析的更大群体的一部分。在 3 年多的时间里，在两个地点进行了表型评估。环境条件允许在全年×地点组合中存在疾病。发现疾病进展曲线下的相对面积（RAUDPC）和产量参数如总重和种子重的表型变异性。对 159 个基因型进行关联作图。p）为4.61 5.42位于染色体3（之间和solcap_snp_c2_16679），4（solcap_snp_c1_6126和solcap_snp_c2_38243，solcap_snp_c2_54077），5（solcap_snp_c2_42374），6（solcap_snp_c2_33228），7（solcap_snp_c1_7407），和10（solcap_snp_c2_63），并使用置换11个显著协会-log( p ) 值介于 4.5 和 6.42 之间的测试，位于染色体 1( solcap_snp_c1_5150 )、2 ( solcap_snp_c1_13923 )、4 ( solcap_snp_c1_4178和solcap_snp_c2_50004 )、5 (solcap_snp_c2_11829和solcap_snp_c2_50532）、7（solcap_snp_c2_35057和solcap_snp_c1_10011）和 9（solcap_snp_c2_1915）。检测到的一些 SNP 与编码参与代谢途径的酶的基因相邻，这些代谢途径响应与病原体的相互作用而被激活。这些标记可能包括在与提高马铃薯品种晚疫病抗性相关的育种计划中。