Wheat diseases such as rusts and powdery mildews are among the most
important and ancient diseases that affect wheat cultivation worldwide.
The pathogen race specific resistance genes cannot maintain long lasting
resistance. On the other hand, the presence of genes confers the non-race
specific resistance last much longer. The durable resistance phenotypes in
wheat against various rust and powdery mildew diseases were reported as
Lr34, Yr18, and Pm38 separately / nevertheless, they were known to locate
very close to each other based on linkage analysis. Recently, it was shown
that all of these resistance phenotypes are indeed conferred by the same
gene, encoding Adenosine triphosphate&ndash / binding cassette transporter
(ABC-transporter) type protein. The way with which this transporter is
functioning to maintain the durable resistance against different types of
pathogens is still unknown.
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The presence of LR34 (or ABC-transporter) gene resistant allele can be
detected by specially designed markers. In spite of the few DNA sequence
differences between the resistant and the susceptible alleles, the easily
applicable PCR based markers allow the detection of the presence of this
durable resistant allele on any given variety or cultivar. In our study, 62
different Turkish bread wheat varieties were screened by the gene specific
molecular markers, developed from those LR34 gene mutation sites. The
11 cultivars determined to contain the resistant allele. This study is the
first screening of Turkish cultivars for the presence of LR34 gene.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613140/index.pdf |
| Date | 01 April 2011 |
| Creators | Boylu, Baris |
| Contributors | Akkaya, Mahinur S |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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