AI Article Synopsis
- Genetic diversity in wheat breeding lines is low, limiting potential yield increases, while secondary and tertiary gene pools offer valuable genetic variability.
- The introgression of genes from related species can enhance wheat's agronomic traits, but tracking these gene segments has been a challenge due to a lack of markers.
- Researchers have developed a large number of single nucleotide polymorphism markers for hexaploid wheat tracking and validated them using a high-density genotyping array, making the information accessible online.
Article Abstract
In wheat, a lack of genetic diversity between breeding lines has been recognized as a significant block to future yield increases. Species belonging to bread wheat's secondary and tertiary gene pools harbour a much greater level of genetic variability, and are an important source of genes to broaden its genetic base. Introgression of novel genes from progenitors and related species has been widely employed to improve the agronomic characteristics of hexaploid wheat, but this approach has been hampered by a lack of markers that can be used to track introduced chromosome segments. Here, we describe the identification of a large number of single nucleotide polymorphisms that can be used to genotype hexaploid wheat and to identify and track introgressions from a variety of sources. We have validated these markers using an ultra-high-density Axiom(®) genotyping array to characterize a range of diploid, tetraploid and hexaploid wheat accessions and wheat relatives. To facilitate the use of these, both the markers and the associated sequence and genotype information have been made available through an interactive web site.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4950041 | PMC |
| http://dx.doi.org/10.1111/pbi.12485 | DOI Listing |
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