This work was carried out to study the response of five bread and two durum wheat cultivars to stem rust and its effect on grain yield under field conditions at Sids and Beni Sweif stations during the three growing seasons 2011/2012, 2012/2013 and 2013/2014. The loss in grain yield and kernel weight of the different wheat genotypes was variable according to the varietal response. Grain yield and kernel weight of the protected plots (protected by the effective fungicide Sumi-eight 5EC(CE)-1-(...Read complete abstract
Primary Author: Abd El Badia, Wheat Disease Research Department
Food crisis is a major concern in Egypt, where drought and saline soils are ubiquitous. Wheat is a staple food in Egypt, which is only moderately tolerant to drought and salinity. Due to its rapidly increasing demand, there is an urgent need in Egypt to enhance wheat yields under drought and salinity conditions. Improving salinity or/and drought tolerance of genotypes is inhibited by a lack of efficient evaluation methods. High throughput precision phenotyping provides an innovative...Read complete abstract
Primary Author: Abdelhamid, National Research Centre
Stem rust caused by Puccinia graminis f. sp. tritici (Pgt) is a major production constraint in most wheat growing areas of Ethiopia. The stem rust pathogen is capable of rapidly developing new virulence to resistance genes. The highlands of Ethiopia are considered a hot spot for Pgt diversity. The present study was conducted to investigate the virulence diversity and spatial distribution of races of Pgt in the major wheat growing areas of Ethiopia. The physiologic races of Pgt were...Read complete abstract
Primary Author: Abera, Ethiopian institute of agricultural research
In Ethiopia, quality seed of improved varieties is the least expensive and most critical input for the sustainable production of wheat, a strategic food security crop grown by some 4.7 million households on 1.7 million hectares. Because wheat is self-pollinated, farmers can save and replant seed from their harvests for several years, without the variety losing its genetic identity. At the same time, recommended seed rates for wheat (150 to 200 kilograms per hectare) are significantly higher...Read complete abstract
Leaf rust is the most common rust in wheat production areas of Syria and causes significant annual yield losses. Using genotypes with durable resistance is the most economical way of controlling the disease. One of the best-known leaf rust resistance genes is Lr46 that confers a slow rusting type of adult plant resistance. The main objective of this study was to identify Lr46 in durum wheat genotypes using morphological and molecular markers. Thirty-two durum wheat genotypes were evaluated...Read complete abstract
Improvement of wheat (Triticum aestivum L.) is a major goal of plant breeders and pathologists to ensure food security and self sufficiency. Relationship between different levels of stem, stripe and leaf rust severity on the two grain yield components (1000-kernel weight and plot yield) were studied during 2015/2016 and 2016/2017 seasons at Sids Agricultural Research Station. Different epiphytotic levels of stem, stripe and leaf rust were created using spreader artificial inoculation and...Read complete abstract
Primary Author: Abou-Zeid, Wheat Diseases Department Plant Pathology research Institute, Agriculture Research Center.
Wild species are sources and donors of many valuable traits for wheat improvement. We studied winter wheat introgression lines for productivity traits, disease resistance, and protein, globulin, gliadin and glutenin contents as well as grain mineral concentrations. Laboratory and field studies allowed selection in populations segregating for resistance to yellow rust and leaf rust. Lines 1718, 1721-9, 1721-4, 1675 and 1727 had the highest yields (6.2 t/ha) and stable leaf rust and stem rust...Read complete abstract
Primary Author: Abugaliyeva, Kazakh Research Institute of Agriculture and Plant Growing
Leaf rust (LR), caused by Puccinia triticina, is among the most important diseases of wheat (Triticum aestivum L.) crops globally. The most sustainable method for controlling rust pathogens is deployment of cultivars incorporating durable forms...Read complete abstract
Primary Author: Adnan Riaz, The University of Queensland, Queensland Alliance for Agriculture and Food Innovation, Australia
Accelerated climate change affects components of complex biological interactions differentially, often causing changes that are difficult to predict. Crop yield and quality are affected by climate change directly, and indirectly, through diseases that themselves will change but remain important. These effects are difficult to dissect and model as their mechanistic bases are generally poorly understood. Nevertheless, a combination of integrated modelling from different disciplines and multi-...Read complete abstract
Primary Author: Adrian Newton, Scottish Crop Research Institute (SCRI), U.K.
Stripe rust of wheat, caused by Puccinia striiformis f. sp. trirtici (Pst) is an important disease in many parts of Iran. Over last two decades several epidemics have occurred in Iran causing the breakdown of widely utilized sources of resistance in wheat cultivars. Fifty isolates were collected from different parts of Iran during 2017. Eight isolates of Pst. from 2017 have been processed to date for race analysis. Infection types were assessed on a 0-9 scale 16 and 18 days after inoculation...Read complete abstract
Primary Author: Afshari, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran.