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<p>The bacterium <i>Xanthomonas campestris</i> pv. <i>campestris</i>, responsible for black rot, poses a significant threat to crucifer production. The development of resistant cultivars remains the most sustainable and effective strategy for managing the disease. In this study, 54 <i>Brassica oleracea</i> genotypes were evaluated for resistance to six races (1, 3, 4, 6, 8, and 9) of <i>Xanthomonas campestris</i> pv. <i>campestris</i> (Xcc). None of the tested genotypes exhibited resistance to races 1 and 4, while several breeding lines and one commercial cultivar demonstrated strong resistance to race 6. Resistance was also observed against races 8 and 9, and partial resistance was observed against race 3. These findings highlight the existence of race-specific resistance patterns and suggest the presence of uncharacterized resistance genes in <i>B. oleracea</i>. This study provides valuable insight for future breeding programs focused on black rot resistance using local Turkish Xcc strains.</p>

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Race-specific resistance in Brassica oleracea cultivars against Xanthomonas campestris pv. campestris: insights from Turkish isolates

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Songül Erken Meral,
  • Hasan Murat Aksoy,
  • Hayati Kar

摘要

The bacterium Xanthomonas campestris pv. campestris, responsible for black rot, poses a significant threat to crucifer production. The development of resistant cultivars remains the most sustainable and effective strategy for managing the disease. In this study, 54 Brassica oleracea genotypes were evaluated for resistance to six races (1, 3, 4, 6, 8, and 9) of Xanthomonas campestris pv. campestris (Xcc). None of the tested genotypes exhibited resistance to races 1 and 4, while several breeding lines and one commercial cultivar demonstrated strong resistance to race 6. Resistance was also observed against races 8 and 9, and partial resistance was observed against race 3. These findings highlight the existence of race-specific resistance patterns and suggest the presence of uncharacterized resistance genes in B. oleracea. This study provides valuable insight for future breeding programs focused on black rot resistance using local Turkish Xcc strains.