the total nitrogen content of three barley cultivars: cehada capa (resistant at 25ac), cl 1243 (resistant at 5°c) and rika 1 (susceptible at all temperatures) to puccinia hordei was determined and compared in healthy and infected plants at 5° and 26°c. the results indicate that the total nitrogen content of cv. cehada capa leaves was greater than that of cl 1243 and rika 1 and that of cl 12...

Vast collections of barley germplasm have been established and conserved in various global gene banks. These hold tremendous genetic diversity for resistance genes to Puccinia hordei, a causal agent leaf rust. This study was undertaken discover, characterize postulate the known Rph (resistance hordei) identify novel sources ASR (all-stage resistance) APR (adult plant P. hordei. A core set 315 l...

Obligate biotrophic fungal pathogens, such as Blumeria graminis and Puccinia graminis, are amongst the most devastating plant causing dramatic yield losses in many economically important crops worldwide. However, a lack of reliable tools for efficient genetic transformation has hampered studies into molecular basis their virulence or pathogenicity. In this study, we present Ustilago hordei–barl...

ABSTRACT Stripe rust is one of the most important diseases of wheat and barley worldwide. On wheat it is caused by Puccinia striiformis f. sp. tritici and on barley by P. striiformis f. sp. hordei Most wheat genotypes are resistant to P. striiformis f. sp. hordei and most barley genotypes are resistant to P. striiformis f. sp. tritici. To determine the genetics of resistance in wheat to P. stri...

Stripe rust of barley, caused by Puccinia striiformis f. sp. hordei (PSH), occurred mainly in California, Idaho, Oregon, and Washington and caused localized damage to barley crops. Growing cultivars with high-temperature, adult-plant resistance and the cropping system contributed to the low level of stripe rust. Stripe rust samples were collected from the four states and tested under controlled...

In the present study, infra specific taxonomy of Puccinia coronata in Iran was studied. Based on morphological characters only, four P. coronata varieties were recognized in Iran. These are: P. coronata var. coronata, P. c. var. avenae, P. c. var. hordei and P. c. var. golestanica var. nov. Descriptions of the four varieties and their host range are provided. Several new hosts for aecial and te...

Durable disease resistance genes such as the wheat gene Lr34 are valuable sources of for agricultural breeding programs. encodes an ATP-binding cassette transporter protein involved in transport phytohormone abscisic acid. from is functionally transferable to barley, maize, rice and sorghum. A pleiotropic effect induces development a senescence-like phenotype, referred leaf tip necrosis. We use...

Barley ( Hordeum vulgare ) is an important crop in Turkey. In this study, 37 barley fields Batman central district and Beşiri (Batman), Gercüş Hasankeyf Kozluk Sason Kocaköy (Diyarbakır), Kurtalan (Siirt), Midyat (Mardin) districts were examined for the presence of leaf diseases. addition, 24 naturally grown wild H. spontaneum populations Beşiri, Hasankeyf, inspected fields, scald caused by Rhy...