The Bph45 Gene Confers Resistance against Brown Planthopper in Rice by Reducing the Production of Limonene

Li, Charng-Pei; Wu, Dong-Hong; Huang, Sheng-Lung; Meng, Menghsiao; Shih, Hsien-Tzung; Lai, Ming-Hsin; Chen, Liang-Jwu; Jena, Kshirod K.; Hechanova, Sherry Lou; Ke, Ting-Jyun; Chiu, Tai-Yuan; Tsai, Zong-Yuan; Chen, Guo-Kai; Tsai, Kuan-Chieh; Leu, Wei-Ming

doi:10.3390/ijms24021798

Cited by 10 publications

(7 citation statements)

References 42 publications

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“…This did not occur in three hybrids (IR80814H, IR81954H, and IR81955H) that showed heterobeltiosis for resistance, thereby further suggesting that quantitative resistance to planthoppers is achievable through the careful selection of parental lines. In our oviposition experiments, plant size affected one of two cases of heterosis for antixenosis resistance; suggesting that there was little effect of breeding on other factors, such as plant volatiles or silicon-based defenses [ 48 , 49 , 50 , 51 , 52 , 53 , 54 ] that are involved in antixenosis resistance. The experiments indicate the importance of separating physiologically-dependent susceptibility (e.g., related to size, growth rates, etc.)…”

Section: Discussionmentioning

confidence: 86%

Heterosis for Resistance to Insect Herbivores in a 3-Line Hybrid Rice System

Horgan,

Bernal,

Ramal

et al. 2024

Insects

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Three-line hybrid rice is produced by crossing male sterile (A line) rice with a fertility-restorer (R line). Fertile lines (B lines) are also required to maintain A line seed for breeding programs. We used a range of hybrids and their parental lines to assess the frequency and nature of heterosis for resistance to the whitebacked planthopper (Sogatella furcifera), brown planthopper (Nilaparvata lugens) and yellow stemborer (Scirpophaga incertulas). Heterosis is defined as trait improvement above the average of the parental lines as a result of outbreeding. Based on the results from a greenhouse study that challenged hybrids and their parental lines with each herbivore species, we found that susceptibility to planthoppers was associated with one of the eight A lines tested, but resistance was improved by crossing with a relatively resistant restorer. Higher frequencies of heterosis for susceptibility in comparisons between hybrids and their B lines suggest that susceptibility was not related to the cytoplasmic genomes of the associated sterile A lines. Furthermore, because none of the parental lines possessed currently effective resistance genes, improved resistance against planthoppers was probably due to quantitative resistance. In a related field trial, hybrids had generally higher yields than their fertile parents and often produced larger grain; however, they were often more susceptible to stemborers, leaffolders (Cnaphalocrocis medinalis) and other caterpillars (Rivula atimeta). This was largely a consequence of hybrid heterosis for plant biomass and was strongly affected by crop duration. We make a series of recommendations to improve hybrid breeding to reduce the risks of herbivore damage.

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Section: Discussionmentioning

confidence: 86%

Heterosis for Resistance to Insect Herbivores in a 3-Line Hybrid Rice System

Horgan,

Bernal,

Ramal

et al. 2024

Insects

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“…As a result, the identification and molecular breeding of rice germplasms that possess BPH-resistance genes (referred to as Bph/bph genes) are regarded as the optimal approach for effectively controlling and managing BPH [3]. Up to the present, a total of 45 BPH resistance loci have been documented across various rice cultivars and wild-rice species [4]. Amongst them, bph2/Bph26 [5], Bph3/Bph17 [6], Bph6 [7], Bph9 [8],…”

Section: Introductionmentioning

confidence: 99%

Defense Regulatory Network Associated with circRNA in Rice in Response to Brown Planthopper Infestation

Yang,

Wang,

Xiao

et al. 2024

Plants

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The brown planthopper (BPH), Nilaparvata lugens (Stål), a rice-specific pest, has risen to the top of the list of significant pathogens and insects in recent years. Host plant-mediated resistance is an efficient strategy for BPH control. Nonetheless, BPH resistance in rice cultivars has succumbed to the emergence of distinct virulent BPH populations. Circular RNAs (circRNAs) play a pivotal role in regulating plant–environment interactions; however, the mechanisms underlying their insect-resistant functions remain largely unexplored. In this study, we conducted an extensive genome-wide analysis using high-throughput sequencing to explore the response of rice circRNAs to BPH infestations. We identified a total of 186 circRNAs in IR56 rice across two distinct virulence groups: IR-IR56-BPH (referring to IR rice infested by IR56-BPH) and IR-TN1-BPH, along with a control group (IR-CK) without BPH infestation. Among them, 39 circRNAs were upregulated, and 43 circRNAs were downregulated in the comparison between IR-IR56-BPH and IR-CK. Furthermore, in comparison with IR-CK, 42 circRNAs exhibited upregulation in IR-TN1-BPH, while 42 circRNAs showed downregulation. The Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis revealed that the targets of differentially expressed circRNAs were considerably enriched in a multitude of biological processes closely linked to the response to BPH infestations. Furthermore, we assessed a total of 20 randomly selected circRNAs along with their corresponding expression levels. Moreover, we validated the regulatory impact of circRNAs on miRNAs and mRNAs. These findings have led us to construct a conceptual model that circRNA is associated with the defense regulatory network in rice, which is likely facilitated by the mediation of their parental genes and competing endogenous RNA (ceRNA) networks. This model contributes to the understanding of several extensively studied processes in rice-BPH interactions.

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“…Therefore, new sources of resistance to BPH are a continuous requirement of the rice breeding program. In this study [ 15 ], a major effect-resistance gene, Bph45, located on chromosome 4, was identified from Oryza nivara by genetic mapping. A near-isogenic line (NIL) for this gene in a japonica varietal background was compared with its recurrent parent with respect to the emitted volatile organic compounds (VOCs) in order to understand the underlying resistance mechanism.…”

Section: Introductionmentioning

confidence: 99%