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2016•Nature PlantsOpen access

Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida

Aureliano Bombarely, Michel Moser, Avichai Amrad, Manzhu Bao, Laure Bapaume, Cornelius S. Barry, Mattijs Bliek, Maaike R. Boersma, Lorenzo Borghi, Rémy Bruggmann, Marcel Bucher, Nunzio D’Agostino, Kevin M. Davies, Uwe Druege, Natalia Dudareva, Marcos Egea‐Cortines, Massimo Delledonne, Noé Fernández‐Pozo, Philipp Franken, Laurie Grandont, J. S. Heslop‐Harrison, Jennifer D. Hintzsche, Mitrick A. Johns, Ronald Koes, Xiaodan Lv, Eric Lyons, Diwa Malla, Enrico Martinoia, Neil Mattson, P. Morel, Lukas A. Mueller, Joëlle K. Mühlemann, Eva Nouri, Valentina Passeri, Mario Pezzotti, Qinzhou Qi, Didier Reinhardt, Mélanie K. Rich, Katja R. Richert‐Pöggeler, Timothy P. Robbins, Michael C. Schatz, M. Eric Schranz, Robert C. Schuurink, Trude Schwarzacher, Kees Spelt, Haibao Tang, Susan L. Urbanus, Michiel Vandenbussche, Kitty Vijverberg, Gonzalo Villarino, Ryan M. Warner, Julia Weiß, Zhen Yue, Jan Zethof, Francesca Quattrocchio, Thomas L. Sims, Cris Kuhlemeier

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Abstract

Petunia hybrida is a popular bedding plant that has a long history as a genetic model system. We report the whole-genome sequencing and assembly of inbred derivatives of its two wild parents, P. axillaris N and P. inflata S6. The assemblies include 91.3% and 90.2% coverage of their diploid genomes (1.4 Gb; 2n = 14) containing 32,928 and 36,697 protein-coding genes, respectively. The genomes reveal that the Petunia lineage has experienced at least two rounds of hexaploidization: the older gamma event, which is shared with most Eudicots, and a more recent Solanaceae event that is shared with tomato and other solanaceous species. Transcription factors involved in the shift from bee to moth pollination reside in particularly dynamic regions of the genome, which may have been key to the remarkable diversity of floral colour patterns and pollination systems. The high-quality genome sequences will enhance the value of Petunia as a model system for research on unique biological phenomena such as small RNAs, symbiosis, self-incompatibility and circadian rhythms.

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Petunia hybrida is a popular bedding plant that has a long history as a genetic model system. We report the whole-genome sequencing and assembly of inbred derivatives of its two wild parents, P. axillaris N and P. inflata S6. The assemblies include 91.3% and 90.2% coverage of their diploid genomes (1.4 Gb; 2n = 14) containing 32,928 and 36,697 protein-coding genes, respectively. The genomes reveal that the Petunia lineage has experienced at least two rounds of hexaploidization: the older gamma event, which is shared with most Eudicots, and a more recent Solanaceae event that is shared with tomato and other solanaceous species. Transcription factors involved in the shift from bee to moth pollination reside in particularly dynamic regions of the genome, which may have been key to the remarkable diversity of floral colour patterns and pollination systems. The high-quality genome sequences will enhance the value of Petunia as a model system for research on unique biological phenomena such as small RNAs, symbiosis, self-incompatibility and circadian rhythms.

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Available abstract

Petunia hybrida is a popular bedding plant that has a long history as a genetic model system. We report the whole-genome sequencing and assembly of inbred derivatives of its two wild parents, P. axillaris N and P. inflata S6. The assemblies include 91.3% and 90.2% coverage of their diploid genomes (1.4 Gb; 2n = 14) containing 32,928 and 36,697 protein-coding genes, respectively. The genomes reveal that the Petunia lineage has experienced at least two rounds of hexaploidization: the older gamma event, which is shared with most Eudicots, and a more recent Solanaceae event that is shared with tomato and other solanaceous species. Transcription factors involved in the shift from bee to moth pollination reside in particularly dynamic regions of the genome, which may have been key to the remarkable diversity of floral colour patterns and pollination systems. The high-quality genome sequences will enhance the value of Petunia as a model system for research on unique biological phenomena such as small RNAs, symbiosis, self-incompatibility and circadian rhythms.

Key concepts: Petunia, Solanaceae, Biology, Genome, Botany, Genetics, Gene

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Insight into the evolution of the Solanaceae from the parental genomes of Petunia hybrida — Research Paper | ScholarLens