research highlights CROP GENOMICS Nature 557, 424–428 (2018) Credit: Hong-qinq Ling, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences The wild einkorn wheat Triticum urartu (Tu) is the A-genome progenitor of tetraploid (AABB) and hexaploid (AABBDD) wheat. A draft genome of Tu was published in 2013, but a better reference sequence is urgently needed by scientists and breeders. Hong-Qing Ling, from the Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and colleagues have now completed a high-quality Tu genome using multiple methods. Assisted by technologies like BAC-by- BAC sequencing, PacBio sequencing, linked- read sequencing and optical mapping, the researchers assembled a high-quality genome of Tu with contig and scaffold lengths significantly increased. The genome includes 41,507 predicted protein-coding genes. Repetitive elements cover 81% of the whole sequence, with bursts of retrotransposons that repeatedly expanded the genome. In comparison with other grass genomes, Tu-specific or wheat specifically amplified gene families were found to associate with stress response or vernalization. Large- scale retrotransposon-mediated structural rearrangements occurred during A-genome evolution, as revealed by comparing the A genomes among Tu, tetraploid and hexaploid wheat. An evolutionary model of the Tu chromosomes was proposed based on co-linearity analyses. Resequencing of the transcriptomes clustered 147 Tu accessions into three groups, with differences in altitudes of origin and resistance to powdery mildew pathogen. The optimised wheat A genome represents valuable resource for agricultural genetic research and breeding in wheat and related cereal crops. Jun Lyu Published online: 28 May 2018 https://doi.org/10.1038/s41477-018-0183-0 NAtuRE PlANt S | VOL 4 | JUNE 2018 | 320 | www.nature.com/natureplants © 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. © 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
Nature Plants – Springer Journals
Published: May 28, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera