Genome sequence and analysis of the tuber crop potato |
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Authors: | Potato Genome Sequencing Consortium Xu Xun Pan Shengkai Cheng Shifeng Zhang Bo Mu Desheng Ni Peixiang Zhang Gengyun Yang Shuang Li Ruiqiang Wang Jun Orjeda Gisella Guzman Frank Torres Michael Lozano Roberto Ponce Olga Martinez Diana De la Cruz Germán Chakrabarti S K Patil Virupaksh U Skryabin Konstantin G Kuznetsov Boris B Ravin Nikolai V Kolganova Tatjana V Beletsky Alexey V Mardanov Andrei V Di Genova Alex Bolser Daniel M Martin David M A Li Guangcun Yang Yu Kuang Hanhui Hu Qun Xiong Xingyao Bishop Gerard J Sagredo Boris Mejía Nilo Zagorski Wlodzimierz Gromadka Robert Gawor Jan |
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Institution: | BGI-Shenzhen, Chinese Ministry of Agricultural, Key Lab of Genomics, Beishan Industrial Zone, Yantian District, Shenzhen 518083, China. |
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Abstract: | Potato (Solanum tuberosum L.) is the world's most important non-grain food crop and is central to global food security. It is clonally propagated, highly heterozygous, autotetraploid, and suffers acute inbreeding depression. Here we use a homozygous doubled-monoploid potato clone to sequence and assemble 86% of the 844-megabase genome. We predict 39,031 protein-coding genes and present evidence for at least two genome duplication events indicative of a palaeopolyploid origin. As the first genome sequence of an asterid, the potato genome reveals 2,642 genes specific to this large angiosperm clade. We also sequenced a heterozygous diploid clone and show that gene presence/absence variants and other potentially deleterious mutations occur frequently and are a likely cause of inbreeding depression. Gene family expansion, tissue-specific expression and recruitment of genes to new pathways contributed to the evolution of tuber development. The potato genome sequence provides a platform for genetic improvement of this vital crop. |
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