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Nat Plants. 2019 Feb;5(2):174-183. doi: 10.1038/s41477-018-0349-9. Epub 2019 Jan 28.

Genome structure and evolution of Antirrhinum majus L.

Li M1,2, Zhang D1, Gao Q3, Luo Y4, Zhang H1,2, Ma B3, Chen C5, Whibley A6, Zhang Y1, Cao Y3, Li Q1, Guo H1,2, Li J1,2, Song Y1,2, Zhang Y1,2, Copsey L6, Li Y3, Li X2,3, Qi M3, Wang J7, Chen Y5, Wang D5, Zhao J5, Liu G5, Wu B5, Yu L5, Xu C5, Li J5, Zhao S5, Zhang Y7, Hu S2,4, Liang C8,9, Yin Y10, Coen E11, Xue Y12,13,14.

Author information

1
State Key Laboratory of Plant Cell and Chromosome Engineering and National Center of Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
2
University of Chinese Academy of Sciences, Beijing, China.
3
State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
4
Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.
5
BGI-Shenzhen, Shenzhen, China.
6
John Innes Centre, Norwich, UK.
7
National Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
8
University of Chinese Academy of Sciences, Beijing, China. cliang@genetics.ac.cn.
9
State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China. cliang@genetics.ac.cn.
10
BGI-Shenzhen, Shenzhen, China. yinye@genomics.cn.
11
John Innes Centre, Norwich, UK. enrico.coen@jic.ac.uk.
12
State Key Laboratory of Plant Cell and Chromosome Engineering and National Center of Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China. ybxue@genetics.ac.cn.
13
University of Chinese Academy of Sciences, Beijing, China. ybxue@genetics.ac.cn.
14
Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China. ybxue@genetics.ac.cn.

Abstract

Snapdragon (Antirrhinum majus L.), a member of the Plantaginaceae family, is an important model for plant genetics and molecular studies on plant growth and development, transposon biology and self-incompatibility. Here we report a near-complete genome assembly of A. majus cultivar JI7 (A. majus cv.JI7) comprising 510 Megabases (Mb) of genomic sequence and containing 37,714 annotated protein-coding genes. Scaffolds covering 97.12% of the assembled genome were anchored on eight chromosomes. Comparative and evolutionary analyses revealed that a whole-genome duplication event occurred in the Plantaginaceae around 46-49 million years ago (Ma). We also uncovered the genetic architectures associated with complex traits such as flower asymmetry and self-incompatibility, identifying a unique duplication of TCP family genes dated to around 46-49 Ma and reconstructing a near-complete ψS-locus of roughly 2 Mb. The genome sequence obtained in this study not only provides a representative genome sequenced from the Plantaginaceae but also brings the popular plant model system of Antirrhinum into the genomic age.

PMID:
30692677
DOI:
10.1038/s41477-018-0349-9

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