Fusarium root rot (Fusarium cuneirostrum; FRR) and Fusarium wilt (Fusarium oxysporum; FW) are major constraints on common bean (Phaseolus vulgaris L.) production worldwide because limited genetic resistance is available in current cultivars. Wild accessions have greater genetic diversity than cultivated germplasm and could provide novel sources of resistance for these diseases. We screened 248 wild bean accessions in a greenhouse setting for responses to both FRR and FW and recorded disease severity; resistance was observed in 21 and 16 accessions, respectively. Accession PI417775 was the most resistant to FRR, exhibiting very few symptoms, whereas accessions PI661845 and PI535441 were the most resistant to FW. Only accessions MX-GT-1 and PI535445 were resistant to both FRR and FW. Overall, accessions collected from Andean regions had greater disease symptoms (5.4 ± 1.28 for FRR; 5.8 ± 1.12 for FW) than accessions collected from Middle America (4.7 ± 1.33 for FRR; 4.42 ± 1.04 for FW), though the highest and lowest disease scores for FRR were both found in the Middle American accessions. Introgression of Fusarium resistance from wild bean accessions into cultivated lines provides an avenue to improve disease resistance in elite cultivars.

中文翻译：

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野豆（Phaseolus spp.）种质抗楔镰刀菌和尖孢镰刀菌的初步评价

镰刀菌根腐病 ( Fusarium cuneirostrum ; FRR) 和枯萎病 ( Fusarium oxysporum ; FW) 是普通豆 ( Phaseolus vulgaris ) 的主要制约因素L.) 在全球范围内生产，因为当前栽培品种的遗传抗性有限。野生种质比栽培种质具有更大的遗传多样性，可以为这些疾病提供新的抗性来源。我们在温室环境中筛选了 248 个野生豆种质对 FRR 和 FW 的反应并记录了疾病严重程度；分别在 21 和 16 个种质中观察到抗性。登录号 PI417775 对 FRR 的抗性最强，表现出的症状很少，而登录号 PI661845 和 PI535441 对 FW 的抗性最强。只有 MX-GT-1 和 PI535445 种质对 FRR 和 FW 都具有抗性。总体而言，从安第斯地区收集的种质比从中美洲收集的种质（FRR 为 4.7±1.33；FW 为 4.42±1.04）具有更大的疾病症状（FRR 为 5.4±1.28；FW 为 5.8±1.12），尽管 FRR 的最高和最低疾病评分均出现在中美洲种质中。基因渗入从野生豆种质到栽培品系的镰刀菌抗性为提高优良品种的抗病性提供了途径。