Genome sequence of the cluster root forming white lupin

Bárbara Hufnagel, et al.

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Sep 18, 2019

Received Date: 16th September 19

Bárbara Hufnagel, André Marques, Alexandre Soriano, Laurence Marquès, Fanchon Divol, Patrick Doumas, Erika Sallet, Davide Mancinotti, Sébastien Carrere, William Marande, Sandrine Arribat, Jean Keller, Cécile Huneau, Thomas Blein, Delphine Aime, Malika Laguerre, Jemma Taylor, Veit Schubert, Matthew Nelson, Fernando Geu-Flores, Martin Crespi, Karine Gallardo-Guerrero, PierreMarc Delaux, Jérôme Salse, Hélène Bergès, Romain Guyot, Jérôme Gouzy & Benjamin Péret

White lupin (Lupinus albus L.) is an annual crop that can produce cluster roots. These structures are made of dozens of determinate lateral roots that drastically improve soil exploration and nutrient acquisition (mostly phosphate)1–3. The ability to produce cluster roots is found in 10 botanical families4 and represents a trait of interest to improve fertilizers efficiency. Using long reads sequencing technologies, we generated a high-quality genome sequence of a modern variety of white lupin (2n=50, 451 Mb), as well as de novo assemblies of a landrace and a wild relative. We describe how domestication impacted soil exploration capacity through the early establishment of lateral and cluster roots. We identify the APETALA2 transcription factor LaPUCHI-1, ortholog of the Arabidopsis morphogenesis coordinator5, as a potential regulator of this trait. Our high-quality genome and companion genomic and transcriptomic resources enable the development of modern breeding strategies to increase and stabilize white lupin yield. It also opens the way to strategies aiming at transferring the capacity to produce cluster roots to other crops.

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This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.

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