Origins of Susceptibility to Insect Herbivores in High-Yielding Hybrid and Inbred Rice Genotypes.

Autor: Horgan FG; EcoLaVerna Integral Restoration Ecology, Bridestown, Kildinan, T56 P499 County Cork, Ireland.; School of Agronomy, Faculty of Agrarian and Forest Sciences, Catholic University of Maule Casilla 7-D, Curicó 3349001, Chile.; Centre for Pesticide Suicide Prevention, University/BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh EH16 4TJ, UK., Almazan MLP; International Rice Research Institute, Makati 1226, Manila, Philippines., Bernal CC; International Rice Research Institute, Makati 1226, Manila, Philippines., Dilla-Ermita CJ; International Rice Research Institute, Makati 1226, Manila, Philippines.; Department of Plant Sciences, UC Davis, One Shields Ave., Davis, CA 95616, USA., Ardestani G; International Rice Research Institute, Makati 1226, Manila, Philippines.; Boston IVF-IVIRMA Global Research Alliance, Waltham, MA 02451, USA., Mundaca EA; School of Agronomy, Faculty of Agrarian and Forest Sciences, Catholic University of Maule Casilla 7-D, Curicó 3349001, Chile., Crisol-Martínez E; EcoLaVerna Integral Restoration Ecology, Bridestown, Kildinan, T56 P499 County Cork, Ireland.; International Rice Research Institute, Makati 1226, Manila, Philippines.; Association of Fruit and Vegetable Growers of Almeria (COEXPHAL), Carretera de Ronda 11, 04004 Almeria, Spain.
Jazyk: angličtina
Zdroj: Insects [Insects] 2024 Aug 12; Vol. 15 (8). Date of Electronic Publication: 2024 Aug 12.
DOI: 10.3390/insects15080608
Abstrakt: Several studies have reported higher damage from insect herbivores to hybrid compared to inbred (pure line) rice. We used a collection of 20 hybrid and 12 inbred genotypes from diverse origins to test the hypotheses that hybrid rice susceptibility is due to (a) the hybrid plant type and/or (b) rice phylogeny. We challenged the genotypes with Nilaparvata lugans (BPH), Sogatella furcifera (WBPH) and Scirpophaga incertulas (YSB) in greenhouse and screenhouse bioassays and monitored herbivores in field plots. We used single nucleotide polymorphic (SNP) markers to assess genetic similarities between the genotypes and found that the hybrids and inbreds formed two distinct clusters regardless of origin. In the screenhouse, hybrids were more susceptible than inbreds to YSB; however, resistant hybrids and susceptible inbreds were also apparent from both the screenhouse and field plots. Plant biomass was the best predictor of susceptibility to YSB. Plant origin had a greater effect than plant type on susceptibility to BPH and WBPH. WBPH was the most abundant planthopper in the field plots where numbers were highly correlated with planthopper fitness in the greenhouse bioassays. Our results provide evidence that high-yielding hybrids that are relatively resistant to herbivores can be achieved through careful breeding. The avoidance of susceptible genotypes during breeding should remain a key element of integrated rice pest management.
Databáze: MEDLINE
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