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<p>Blast disease caused by the filamentous fungus <i>Magnaporthe grisea</i> is an economically important disease of finger millet. Identification of resistant sources is important to develop blast resistant varieties. A total of 153 finger millet genotypes were evaluated in augmented field trials for grain yield and blast resistance across two locations, Bangalore and Vizianagaram, representing major finger millet growing agro-climatic regions of India, during the rainy seasons of 2023 and 2024. Significant genetic variability was observed among the genotypes for agronomic and disease resistance traits, indicating substantial potential for genetic improvement. High heritability for grain yield per plant, ear weight, and blast scores suggested ample scope for effective selection toward enhanced productivity and resilience. Ear weight per plant showed a significant positive direct effect on grain yield, highlighting its usefulness as an indirect selection criterion for yield improvement. K-means clustering grouped genotypes into six clusters, revealing no direct association between genetic diversity and geographic origin. Cluster III comprised genotypes combining superior grain yield with blast resistance, whereas Cluster II consisted mainly of early-maturing but blast-susceptible genotypes. Principal component analysis further confirmed the contribution of phenological and disease resistance traits to total variation. A total of 33 genotypes, including GE 5155, GE 4805, and GE 4809, were identified as promising sources of high yield and blast resistance. Landraces such as GE 3322 (Dodda Ragi) and GE 1596 (Gidda Ragi) also exhibited desirable agronomic performance and disease resistance. These genotypes can serve as valuable donors for breeding climate-resilient finger millet cultivars.</p>

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Identification of novel sources for grain yield and blast resistance in finger millet [Eleusine coracana (L.) Gaertn.] through multi-location evaluation

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Sujata Bhat,
  • K. B. Palanna,
  • N. Anuradha,
  • R. Madhusudhana,
  • J. Meenakshi,
  • N. Marappa,
  • D. N. Vinutha,
  • I. S. Tilak,
  • M. Thippeswamy

摘要

Blast disease caused by the filamentous fungus Magnaporthe grisea is an economically important disease of finger millet. Identification of resistant sources is important to develop blast resistant varieties. A total of 153 finger millet genotypes were evaluated in augmented field trials for grain yield and blast resistance across two locations, Bangalore and Vizianagaram, representing major finger millet growing agro-climatic regions of India, during the rainy seasons of 2023 and 2024. Significant genetic variability was observed among the genotypes for agronomic and disease resistance traits, indicating substantial potential for genetic improvement. High heritability for grain yield per plant, ear weight, and blast scores suggested ample scope for effective selection toward enhanced productivity and resilience. Ear weight per plant showed a significant positive direct effect on grain yield, highlighting its usefulness as an indirect selection criterion for yield improvement. K-means clustering grouped genotypes into six clusters, revealing no direct association between genetic diversity and geographic origin. Cluster III comprised genotypes combining superior grain yield with blast resistance, whereas Cluster II consisted mainly of early-maturing but blast-susceptible genotypes. Principal component analysis further confirmed the contribution of phenological and disease resistance traits to total variation. A total of 33 genotypes, including GE 5155, GE 4805, and GE 4809, were identified as promising sources of high yield and blast resistance. Landraces such as GE 3322 (Dodda Ragi) and GE 1596 (Gidda Ragi) also exhibited desirable agronomic performance and disease resistance. These genotypes can serve as valuable donors for breeding climate-resilient finger millet cultivars.