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Exploiting the genome of Thinopyrum elongatum to expand the gene pool of hexaploid wheat
Key message One hundred and thirty four introgressions from Thinopyrum elongatum have been transferred into a wheat background and were characterised using 263 SNP markers. Species within the genus Thinopyrum have been shown to carry genetic variation for a very wide range of traits including biotic...
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Published in: | Theoretical and applied genetics 2020-07, Vol.133 (7), p.2213-2226 |
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Main Authors: | , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Key message
One hundred and thirty four introgressions from
Thinopyrum elongatum
have been transferred into a wheat background and were characterised using 263 SNP markers.
Species within the genus Thinopyrum have been shown to carry genetic variation for a very wide range of traits including biotic and abiotic stresses and quality. Research has shown that one of the species within this genus,
Th. elongatum
, has a close relationship with the genomes of wheat making it a highly suitable candidate to expand the gene pool of wheat. Homoeologous recombination, in the absence of the
Ph1
gene, has been exploited to transfer an estimated 134 introgressions from
Th. elongatum
into a hexaploid wheat background. The introgressions were detected and characterised using 263 single nucleotide polymorphism markers from a 35 K Axiom
®
Wheat-Relative Genotyping Array, spread across seven linkage groups and validated using genomic in situ hybridisation. The genetic map had a total length of 187.8 cM and the average chromosome length was 26.8 cM. Comparative analyses of the genetic map of
Th. elongatum
and the physical map of hexaploid wheat confirmed previous work that indicated good synteny at the macro-level, although
Th. elongatum
does not contain the 4A/5A/7B translocation found in wheat. |
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ISSN: | 0040-5752 1432-2242 |
DOI: | 10.1007/s00122-020-03591-3 |