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- Title
Echinochloa crus-galli genome analysis provides insight into its adaptation and invasiveness as a weed.
- Authors
Longbiao Guo; Jie Qiu; Chuyu Ye; Gulei Jin; Lingfeng Mao; Haiqiang Zhang; Xuefang Yang; Qiong Peng; Yingying Wang; Lei Jia; Zhangxiang Lin; Gengmi Li; Fei Fu; Chen Liu; Li Chen; Enhui Shen; Weidi Wang; Qinjie Chu; Dongya Wu; Sanling Wu
- Abstract
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.
- Subjects
ECHINOCHLOA; WEEDS; GLUTATHIONE transferase; GENOME size; CYTOCHROME P-450; PYRICULARIA oryzae; GENE clusters
- Publication
Nature Communications, 2017, Vol 8, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-017-01067-5