Transcript-specific, single-nucleotide polymorphism discovery and linkage analysis in hexaploid bread wheat (Triticum aestivum L.)
Summary Food security is a global concern and substantial yield increases in cereal crops are required to feed the growing world population. Wheat is one of the three most important crops for human and livestock feed. However, the complexity of the genome coupled with a decline in genetic diversity...
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Published in | Plant biotechnology journal Vol. 9; no. 9; pp. 1086 - 1099 |
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Main Authors | , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
Blackwell Publishing Ltd
01.12.2011
Blackwell |
Subjects | |
Online Access | Get full text |
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Summary: | Summary
Food security is a global concern and substantial yield increases in cereal crops are required to feed the growing world population. Wheat is one of the three most important crops for human and livestock feed. However, the complexity of the genome coupled with a decline in genetic diversity within modern elite cultivars has hindered the application of marker‐assisted selection (MAS) in breeding programmes. A crucial step in the successful application of MAS in breeding programmes is the development of cheap and easy to use molecular markers, such as single‐nucleotide polymorphisms. To mine selected elite wheat germplasm for intervarietal single‐nucleotide polymorphisms, we have used expressed sequence tags derived from public sequencing programmes and next‐generation sequencing of normalized wheat complementary DNA libraries, in combination with a novel sequence alignment and assembly approach. Here, we describe the development and validation of a panel of 1114 single‐nucleotide polymorphisms in hexaploid bread wheat using competitive allele‐specific polymerase chain reaction genotyping technology. We report the genotyping results of these markers on 23 wheat varieties, selected to represent a broad cross‐section of wheat germplasm including a number of elite UK varieties. Finally, we show that, using relatively simple technology, it is possible to rapidly generate a linkage map containing several hundred single‐nucleotide polymorphism markers in the doubled haploid mapping population of Avalon × Cadenza. |
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Bibliography: | istex:ABBC4A08E3DA13A1D31BE8791E204580C7FF633F ark:/67375/WNG-0Q239G94-V ArticleID:PBI628 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1467-7644 1467-7652 |
DOI: | 10.1111/j.1467-7652.2011.00628.x |