High-quality genome sequence of white lupin provides insight into soil exploration and seed quality

First author: Bárbara Hufnagel; Affiliations:  Univ Montpellier (蒙彼利埃大学): Montpellier, France

Corresponding author: Benjamin Péret

White lupin (Lupinus albus L.) is an annual crop cultivated for its protein-rich seeds. It is adapted to poor soils due to the production of cluster roots, which are made of dozens of determinate lateral roots that drastically improve soil exploration and nutrient acquisition (mostly phosphate). Using long-read sequencing technologies, we provide a high-quality genome sequence of a cultivated accession of white lupin (2n = 50, 451 Mb), as well as de novo assemblies of a landrace and a wild relative. We describe a modern accession displaying increased soil exploration capacity through early establishment of lateral and cluster roots. We also show how seed quality may have been impacted by domestication in term of protein profiles and alkaloid content. The availability of a high-quality genome assembly together with companion genomic and transcriptomic resources will enable the development of modern breeding strategies to increase and stabilize white lupin yield.

白羽扇豆是一年生作物，其种子富含蛋白，因而被广泛栽培。白羽扇豆的根为簇状根，因为能够适应贫瘠的土壤，白羽扇豆的簇状根由数十个侧根组成，极大的增加在土壤中的扩张能力，并且有利于吸收营养物质，比如说磷酸盐。利用长read测序技术，作者在本文中报道了白羽扇豆栽培种的高质量参考基因组，该品种为二倍体，25对染色体，大小约为451Mb，同时作者也从头组装了一个地方品种和一个野生种。作者发现现代的白羽扇豆材料由于很早就能够建立起侧根和簇状根系统，因而其在土壤中的扩张能力也更强。作者还从种子的蛋白谱和生物碱含量两个方面说明了驯化是如何影响白羽扇豆种子质量的。本文所提供的白羽扇豆高质量参考基因组以及比较基因组和转录组资源将有利于白羽扇豆以产量为目标的现代育种策略开发。

通讯：Benjamin Péret（https://www1.montpellier.inra.fr/wp-inra/bpmp/recherche/les-equipes/plasticite/）

研究方向：植物侧根发育调控机制以及环境对侧根发育的影响。

doi: https://doi.org/10.1038/s41467-019-14197-9

Journal: Nature Communications

Published date: January 24, 2020