نتایج جستجو برای: puccinia hordei
تعداد نتایج: 2211 فیلتر نتایج به سال:
Leaf rust of barley, caused by Puccinia hordei Otth, is an important foliar disease in most temperate regions of the world. Sixteen major leaf rust resistance (Rph) genes have been described from barley, but only a few have been mapped. The leaf rust resistance gene Rph7 was ®rst described from the cultivar `Cebada Capa' and has proven eective in Europe. Previously mapped restriction fragment ...
BACKGROUND Higher plants possess a large multigene family encoding secreted class III peroxidase (Prx) proteins. Peroxidases appear to be associated with plant disease resistance based on observations of induction during disease challenge and the presence or absence of isozymes in resistant vs susceptible varieties. Despite these associations, there is no evidence that allelic variation of pero...
Ustilago hordei is a biotrophic parasite of barley (Hordeum vulgare). After seedling infection, the fungus persists in the plant until head emergence when fungal spores develop and are released from sori formed at kernel positions. The 26.1-Mb U. hordei genome contains 7113 protein encoding genes with high synteny to the smaller genomes of the related, maize-infecting smut fungi Ustilago maydis...
The MAT region of Ustilago hordei, a bipolar barley pathogen, harbors distinct mating functions (a and b loci). Here, we show that the b locus is essential for mating and pathogenicity, and can induce pathogenicity when introduced into a strain carrying a b locus of opposite specificity. Transformation experiments using components of the a1 locus and analysis of resulting dual mating phenotypes...
به منظور تعیین پاتوتیپ های زنگ زرد جو، نمونه هایی از جو، جو موشی (hordeum morinum) و گندم آلوده به زنگ زرد (puccinia striiformis) از استان های مختلف ایران جمع آوری شد. جدایه ها بر اساس ایجاد آلودگی روی ارقام افتراقی زنگ زرد جو یا گندم، به ترتیب به عنوان فرم اختصاصی p. striiformis f. sp. hordei یا p. striiformis f. sp. tritici تشخیص داده شدند. ژن های بیماریزائی و پاتوتیپ های عامل بیماری زنگ زردج...
Using an enriched library method, seven polymorphic microsatellite loci were isolated from the barley stem gall midge, Mayetiola hordei. Polymorphism at loci was surveyed on 57 individual midges collected on barley in Tunisia. Across loci, polymorphism ranged from two to six alleles per locus. The observed heterozygosity varied between 0.070 and 0.877. Based on the number of alleles detected an...
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