Accurate genomic information is essential for advancing genetic breeding research in specific rice varieties.This study presented a gapless genome assembly of the indica rice cultivar Zhonghui 8015(ZH8015)using Pac Bi...Accurate genomic information is essential for advancing genetic breeding research in specific rice varieties.This study presented a gapless genome assembly of the indica rice cultivar Zhonghui 8015(ZH8015)using Pac Bio HiFi,Hi-C,and ONT(Oxford Nanopore Technologies)ultra-long sequencing technologies,annotating 43037 gene structures.Subsequently,utilizing this genome along with transcriptomic and metabolomic techniques,we explored ZH8015's response to brown planthopper(BPH)infestation.Continuous transcriptomic sampling indicated significant changes in gene expression levels around 48 h after BPH feeding.Enrichment analysis revealed particularly significant alterations in genes related to reactive oxygen species scavenging and cell wall formation.Metabolomic results demonstrated marked increases in levels of several monosaccharides,which are components of the cell wall and dramatic changes in flavonoid contents.Omics association analysis identified differentially expressed genes associated with key metabolites,shedding light on ZH8015's response to BPH infestation.In summary,this study constructed a reliable genome sequence resource for ZH8015,and the preliminary multi-omics results will guide future insect-resistant breeding research.展开更多
由禾谷镰刀菌Fusarium graminearum引起的小麦赤霉病(Fusarium head blight,FHB)是小麦、大麦、燕麦、黑麦等禾谷类作物的毁灭性病害。目前,生产上防治小麦赤霉病主要依靠化学药剂防治,多菌灵等苯并咪唑类杀菌剂使用较为广泛,其作用靶...由禾谷镰刀菌Fusarium graminearum引起的小麦赤霉病(Fusarium head blight,FHB)是小麦、大麦、燕麦、黑麦等禾谷类作物的毁灭性病害。目前,生产上防治小麦赤霉病主要依靠化学药剂防治,多菌灵等苯并咪唑类杀菌剂使用较为广泛,其作用靶标为β微管蛋白。禾谷镰刀菌有2个β微管蛋白,通过分子对接结果发现β2微管蛋白第138位氨基酸位点可能为多菌灵结合位点。本研究对β2第138位丝氨酸位点进行突变研究,以明晰其生物学功能。结果表明Fgβ2S138A突变后禾谷镰刀菌对多菌灵的敏感性显著增加,EC50值由0.617 mg/L降至0.290 mg/L,但不影响对噻菌灵的敏感性,EC50值为0.950 mg/L左右,并且该突变不影响禾谷镰刀菌菌丝营养生长、无性繁殖、有性生殖和致病性。本研究结果可为多菌灵对小麦赤霉病的化学防治提供理论基础,在生产上具有一定指导意义。展开更多
基金supported by the Chinese Academy of Agricultural Sciences Innovation Project(Grant No.CAASASTIP-2013CNRRI)Fundamental Research Funds for Central Public Welfare Research Institutes of Chinese Rice Research Institute(Grant No.CPSIBRF-CNRRI-202102)。
文摘Accurate genomic information is essential for advancing genetic breeding research in specific rice varieties.This study presented a gapless genome assembly of the indica rice cultivar Zhonghui 8015(ZH8015)using Pac Bio HiFi,Hi-C,and ONT(Oxford Nanopore Technologies)ultra-long sequencing technologies,annotating 43037 gene structures.Subsequently,utilizing this genome along with transcriptomic and metabolomic techniques,we explored ZH8015's response to brown planthopper(BPH)infestation.Continuous transcriptomic sampling indicated significant changes in gene expression levels around 48 h after BPH feeding.Enrichment analysis revealed particularly significant alterations in genes related to reactive oxygen species scavenging and cell wall formation.Metabolomic results demonstrated marked increases in levels of several monosaccharides,which are components of the cell wall and dramatic changes in flavonoid contents.Omics association analysis identified differentially expressed genes associated with key metabolites,shedding light on ZH8015's response to BPH infestation.In summary,this study constructed a reliable genome sequence resource for ZH8015,and the preliminary multi-omics results will guide future insect-resistant breeding research.
