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Integrated physical map of bread wheat chromosome arm 7DS to facilitate gene cloning and comparative studies

Integrated physical map of bread wheat chromosome arm 7DS to facilitate gene cloning and comparative studies

Tulpová, Zuzana, Luo, Ming-Cheng, Toegelová, Helena, Visendi, Paul, Hayashi, Satomi, Vojta, Petr, Paux, Etienne, Kilian, Andrzej, Abrouk, Michaël, Bartoš, Jan, Hajdúch, Marián, Batley, Jacqueline, Edwards, David, Doležel, Jaroslav and Šimková, Hana (2018) Integrated physical map of bread wheat chromosome arm 7DS to facilitate gene cloning and comparative studies. New Biotechnology, 48. pp. 12-19. ISSN 1871-6784 (Print), 1876-4347 (Online) (doi:https://doi.org/10.1016/j.nbt.2018.03.003)

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Abstract

Bread wheat (Triticum aestivum L.) is a staple food for a significant part of the world’s population. The growing demand on its production can be satisfied by improving yield and resistance to biotic and abiotic stress. Knowledge of the genome sequence would aid in discovering genes and QTLs underlying these traits and provide a basis for genomics-assisted breeding. Physical maps and BAC clones associated with them have been valuable resources from which to generate a reference genome of bread wheat and to assist map-based gene cloning. As a part of a joint effort coordinated by the International Wheat Genome Sequencing Consortium, we have con- structed a BAC-based physical map of bread wheat chromosome arm 7DS consisting of 895 contigs and covering 94% of its estimated length. By anchoring BAC contigs to one radiation hybrid map and three high resolution genetic maps, we assigned 73% of the assembly to a distinct genomic position. This map integration, inter- connecting a total of 1713 markers with ordered and sequenced BAC clones from a minimal tiling path, provides a tool to speed up gene cloning in wheat. The process of physical map assembly included the integration of the 7DS physical map with a whole-genome physical map of Aegilops tauschii and a 7DS Bionano genome map, which together enabled efficient scaffolding of physical-map contigs, even in the non-recombining region of the genetic centromere. Moreover, this approach facilitated a comparison of bread wheat and its ancestor at BAC-contig level and revealed a reconstructed region in the 7DS pericentromere.

Item Type: Article
Uncontrolled Keywords: Triticum aestivum; BAC; BNG map; Aegilops tauschii; Centromere
Subjects: S Agriculture > S Agriculture (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Faculty of Engineering & Science > Natural Resources Institute > Molecular Virology and Entomology Research Group
Last Modified: 09 Mar 2019 01:38
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: GREAT a
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/20123

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