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<p>Custard apple (<i>Annona squamosa</i> L.), a widely cultivated fruit species valued for its high nutritional and economic significance, suffers considerable yield losses due to infestation by the oriental fruit fly, <i>Bactrocera dorsalis</i> (Hendel). To explore the natural resistance, 20 diverse <i>Annona</i> genotypes, including seven species and 13 cultivars were evaluated under both field and laboratory conditions. Field experiments demonstrated substantial variations in fruit infestation and larval density among genotypes. Among the related species evaluated, <i>Annona mucosa</i> (0.00 ± 0.00%) exhibited complete immunity, while <i>A. montana</i> (1.67 ± 0.39%) and <i>A. glabra</i> (3.30 ± 0.89%) showed high resistance. In contrast, Arka Sahan (68.33 ± 2.34%), Taiwan (50.00 ± 0.96%), and NMK-1 (41.67 ± 0.79%) were found to be highly susceptible. Further challenge inoculation confirmed that <i>A. mucosa</i> remained immune, while <i>A. montana</i> and <i>A. glabra</i> exhibited minimal infestation levels by fruit fly. Correlations revealed high significant negative association between fruit firmness and fruit fly infestation intensity. The results highlight the potential of host plant resistance as a sustainable strategy for managing <i>B. dorsalis</i>, with <i>A. mucosa</i>, <i>A. montana</i> and <i>A. glabra</i> emerging as a promising genetic resource for breeding resistant <i>Annona</i> cultivars. These <i>Annona</i> genotypes serve as valuable donor sources for introgressing durable and heritable fruit fly resistance into elite breeding lines, thereby accelerating the development of fruit fly resistant cultivars through conventional and molecular breeding approaches.</p>

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Exploring host plant resistance in Annona genotypes against oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae)

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Kiran K. Nataraju,
  • Sakthivel Thandavarayan,
  • Sankaran Murugan,
  • Sanjay K. Singh,
  • Shivashankara K. Seetharamaiah,
  • Dhananjaya M. Virupakshappa,
  • Sushmitha B. Hanumanthareddy,
  • Jayanthimala B. Ramakrishnaiah

摘要

Custard apple (Annona squamosa L.), a widely cultivated fruit species valued for its high nutritional and economic significance, suffers considerable yield losses due to infestation by the oriental fruit fly, Bactrocera dorsalis (Hendel). To explore the natural resistance, 20 diverse Annona genotypes, including seven species and 13 cultivars were evaluated under both field and laboratory conditions. Field experiments demonstrated substantial variations in fruit infestation and larval density among genotypes. Among the related species evaluated, Annona mucosa (0.00 ± 0.00%) exhibited complete immunity, while A. montana (1.67 ± 0.39%) and A. glabra (3.30 ± 0.89%) showed high resistance. In contrast, Arka Sahan (68.33 ± 2.34%), Taiwan (50.00 ± 0.96%), and NMK-1 (41.67 ± 0.79%) were found to be highly susceptible. Further challenge inoculation confirmed that A. mucosa remained immune, while A. montana and A. glabra exhibited minimal infestation levels by fruit fly. Correlations revealed high significant negative association between fruit firmness and fruit fly infestation intensity. The results highlight the potential of host plant resistance as a sustainable strategy for managing B. dorsalis, with A. mucosa, A. montana and A. glabra emerging as a promising genetic resource for breeding resistant Annona cultivars. These Annona genotypes serve as valuable donor sources for introgressing durable and heritable fruit fly resistance into elite breeding lines, thereby accelerating the development of fruit fly resistant cultivars through conventional and molecular breeding approaches.