1. The bottle gourd genome provides insights into Cucurbitaceae evolution and facilitates mapping of a Papaya ring‐spot virus resistance locus
- Author
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Shan Wu, Z. J. Wu, Honghe Sun, Xuelian Sui, Amnon Levi, Shamimuzzaman, Zhangjun Fei, Alan Wilder, Jérôme Salse, Kai-Shu Ling, Yong Xu, Wuhan Technology and Business University, Natl Engn Res Ctr Vegetables, Key Lab Biol & Genet Improvement Hort Crops N Chi, Beijing Acad Agr & Forestry Sci, Génétique Diversité et Ecophysiologie des Céréales - Clermont Auvergne (GDEC), Institut National de la Recherche Agronomique (INRA)-Université Clermont Auvergne (UCA), Vegetable Lab, United States Department of Agriculture, Bio-Computing Research Center, Harbin Institute of Technology (HIT), Boyce Thompson Inst Plant Res, Cornell University, Génétique Diversité et Ecophysiologie des Céréales (GDEC), Institut National de la Recherche Agronomique (INRA)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Boyce Thompson Institute [Ithaca], and Cornell University [New York]
- Subjects
0301 basic medicine ,Genome evolution ,[SDV]Life Sciences [q-bio] ,Potyvirus ,Locus (genetics) ,Plant Science ,Genome ,Chromosomes, Plant ,Papaya ringspot virus ,03 medical and health sciences ,Cucurbita ,Cleaved amplified polymorphic sequence ,Botany ,Genetics ,cucurbit genome evolution ,ComputingMilieux_MISCELLANEOUS ,Disease Resistance ,Plant Diseases ,2. Zero hunger ,Comparative genomics ,Papaya ring-spot virus resistance ,biology ,Chromosome Mapping ,Lagenaria ,Cell Biology ,15. Life on land ,biology.organism_classification ,Biological Evolution ,genome sequencing ,Cucurbitaceae ,030104 developmental biology ,Lagenaria siceraria ,Genetic Loci ,bottle gourd ,Genome, Plant - Abstract
Summary Bottle gourd (Lagenaria siceraria) is an important vegetable crop as well as a rootstock for other cucurbit crops. In this study, we report a high-quality 313.4-Mb genome sequence of a bottle gourd inbred line, USVL1VR-Ls, with a scaffold N50 of 8.7 Mb and the longest of 19.0 Mb. About 98.3% of the assembled scaffolds are anchored to the 11 pseudomolecules. Our comparative genomic analysis identifies chromosome-level syntenic relationships between bottle gourd and other cucurbits, as well as lineage-specific gene family expansions in bottle gourd. We reconstruct the genome of the most recent common ancestor of Cucurbitaceae, which reveals that the ancestral Cucurbitaceae karyotypes consists of 12 protochromosomes with 18,534 protogenes. The 12 protochromosomes are largely retained in the modern melon genome, while have undergone different degrees of shuffling events in other investigated cucurbit genomes. The eleven bottle gourd chromosomes derive from the ancestral Cucurbitaceae karyotypes followed by 19 chromosomal fissions and 20 fusions. The bottle gourd genome sequence has facilitated the mapping of a dominant monogenic locus, Prs, conferring Papaya ringspot virus (PRSV) resistance in bottle gourd, to a 317.8-kb region on chromosome 1. We have developed a cleaved amplified polymorphic sequence (CAPS) marker tightly linked to the Prs locus and demonstrated its potential application in marker-assisted selection of PRSV resistance in bottle gourd. This study provides insights into the paleohistory of Cucurbitaceae genome evolution, and the high-quality genome sequence of bottle gourd provides a useful resource for plant comparative genomics studies and cucurbit improvement. This article is protected by copyright. All rights reserved.
- Published
- 2017
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