Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-017-01067-5
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Funding
- State Key Lab of Rice Biology of China
- Zhejiang Natural Science Foundation [LZ17C130001]
- National Natural Science Foundation of China [31401453]
- Fundamental Research Funds for the Central Universities [16+X]
- Jiangsu Collaborative Innovation Center for Modern Crop Production
- 111 Project [B17039]
- China Postdoctoral Science Foundation [2017M612002]
- IBM high performance computing cluster of Analysis Center of Agrobiology and Environmental Sciences, Zhejiang University
- Grants-in-Aid for Scientific Research [17H03811] Funding Source: KAKEN
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Barnyardgrass (Echinochloa crus-galli) is a pernicious weed in agricultural fields worldwide. The molecular mechanisms underlying its success in the absence of human intervention are presently unknown. Here we report a draft genome sequence of the hexaploid species E. crus-galli, i.e., a 1.27 Gb assembly representing 90.7% of the predicted genome size. An extremely large repertoire of genes encoding cytochrome P450 monooxygenases and glutathione S-transferases associated with detoxification are found. Two gene clusters involved in the biosynthesis of an allelochemical 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) and a phytoalexin momilactone A are found in the E. crus-galli genome, respectively. The allelochemical DIMBOA gene cluster is activated in response to co-cultivation with rice, while the phytoalexin momilactone A gene cluster specifically to infection by pathogenic Pyricularia oryzae. Our results provide a new understanding of the molecular mechanisms underlying the extreme adaptation of the weed.
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