2015 BGRI Poster Abstracts

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Displaying 31 - 40 of 415

Rpg1-mediated durable stem rust resistance: mechanisms of action

Stem rust, caused by Puccinia graminis f. sp. tritici, is a devastating disease on wheat and barley. A single barley gene, Rpg1, has provided durable resistance since its commercial introduction in the 1940s. The cloned Rpg1 gene encodes a protein with two tandem protein kinase domains, one an active kinase (pK2) and one a pseudokinase (pK1). Function of both domains is required for resistance. The gene is constitutively expressed in all tissues with...Read complete abstract

Primary Author: Andris Kleinhofs, Department of Crop and Soil Sciences, Washington State University, USA

Keywords:

Rust resistance and inheritance pattern to stripe and leaf rust in elite wheat germplasm from North Hills of India

Wheat crop is attacked by three rust diseases of which stripe rust, caused by Puccinia striiformis f. sp. tritici and leaf rust, caused by Puccinia triticina, are the most common causing greater yield losses. Thirty genotypes were studied for (APR) adult plant resistance and were evaluated in field conditions and controlled conditions. HPW 373, VW 20145, VL 3002, RKVY 231, VL 907, PBW 698 and HS 507 were found to be highly resistant to yellow rust at both seedling and adult plant stages....Read complete abstract

Primary Author: Anubhav, CSK Himachal Pradesh Agricultural University, Palampur, India

Keywords:

Genotype by sequencing for the study of population genetics in Puccinia triticina

Leaf rust, caused by Puccinia triticina Erikss. (Pt), is the most widespread wheat rust disease. Information on the virulence and genetic diversity of Pt is important for understanding the pathogen evolution, and thus effective management of wheat leaf rust. We used 20 Thatcher wheat near isogenic lines to study virulence diversity of 102 Pt isolates collected from tetraploid wheat, common wheat, and Triticale worldwide. Seven races were found among 57 isolates collected from tetraploid...Read complete abstract

Primary Author: Aoun , Department of Plant Pathology, North Dakota State University, Fargo, ND

Keywords: leaf rust

Genetics of yield components for drought tolerant wheat (Triticum aestivum L.) genotypes

Drought tolerance is a polygenic trait, with a complicated phenotype, often confused by plant phenology. Breeding for water stress is more complex since there are many types of abiotic stresses, such as drought, heat and salt. High yielding wheat genotypes viz., Miraj-06, 9452, 9469, 9272, 9277, CMS-127 and three testers Chakwal-50,
Kohistan-97 and Aas-11 were crossed in line ? tester mating design. Seed obtained from crosses was evaluated in field conditions for various agronomic...Read complete abstract

Primary Author: Ashraf, University of Agriculture, faisalabad

Keywords: drought

Identification of resistance wheat cultivars using molecular marker against yellow rust in Azerbaijan

A study was conducted between 2014 and 2016 aiming at determining resistance genotypes of 51 local wheat cultivars in Azerbaijan. The cultivars were evaluated in five different agro-ecological zone including Absheron and Tar-Tar (Irrigated area), Qobustan (dry semi subtropical area),Sheki (rain fed area), and Jalilabad (dry area) against three of the rust pathogens under natural conditions with four repetitions at each region. Field responses under natural infection were recorded according...Read complete abstract

Primary Author: Aslanova, Research Institute of Crop Husbandry, Azerbaijan

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Wheat stripe and stem rust situation in Egypt: Yr27 and Sr31 virulence

Wheat stripe (Puccinia striiformis f. sp. tritici,=Pst) and stem (Puccinia graminis f. sp. tritici =Pgt) rusts are the most important wheat disease in Egypt as well as present in all wheat growing areas. This...Read complete abstract

Primary Author: Atef Shahin, Agricultural Research Centre, Egypt

Keywords:

In vitro response of durum wheat (Triticum durum Desf.) varieties under drought stress

Eleven durum wheat (Triticum durum Desf.) genotypes were screened to select for drought-tolerance under in vitro immature embryos culture. Drought stress is induced by using five PEG concentrations (0, 200, 270, 295 and 310 g/l of PEG 6000). Results showed, for all studied traits, significant differences among PEG treatments and genotypes. In fact, increasing PEG concentration decreases relative growth rate, callus water content, relative water content, in vitro tolerance and relative...Read complete abstract

Primary Author: Ayed, Research Center of Agricultural and Development in Northwest Semi-arid regions of Tunisia

Keywords: durum wheat

Improvement of durum wheat salinity tolerance by intergeneric hybridization of Triticum durum x Hordeum marinum

Wild species with valuable genetic heritage was used long time ago in interspecific crosses to improve cultivated plants adaptation to environmental constraints. The objective of this study is to transfer the salinity tolerance of Hordeum marinum, a wild barley species, to three durum wheat varieties (Karim, Razzek and Nasr) by intergeneric crosses. In order to skip the incompatibility between these species, in vitro immature embryo rescue was performed using B5 medium (Gamborg et al., 1968...Read complete abstract

Primary Author: Ayed-Slama, National Agronomic Institute of Tunisia

Keywords: durum wheat

Three years of the Precision Wheat Phenotyping Platform for diseases in Uruguay: current status and future prospects

Since 2014 CGIAR-WHEAT Program has promoted the establishment of a network of field-based Precision Wheat Phenotyping Platforms (PWPP) to expand the existing collaborations between CIMMYT, ICARDA and National Agricultural Research System partners. The main goals are improving the quality of data collected and shared among institutions to enhance and accelerate the international wheat breeding, and promote synergism with the private sector and nongovernmental organizations. In 2015, the PWPP-...Read complete abstract

Primary Author: Azzimonti, Instituto Nacional de Tecnologia Agropecuaria (INIA), Estaci?n La Estanzuela, Ruta 50, Km 11, Colonia, Uruguay

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Molecular mapping of resistance to the Pgt race Ug99 group in spring wheat landrace PI 177906

Wheat landrace PI 177906 has seedling and field resistance to Pgt races TTKSK and TTKST. From a cross between PI 177906 and LMPG-6, 138 doubled haploid (DH) lines and 144 recombinant inbred lines (RILs) were developed and tested for seedling resistance to Pgt race TTKSK. Goodness-of-fit tests from both populations indicated that two dominant genes in PI 177906 conditioned resistance to race TTKSK. Parents and the 138 DH lines were evaluated in the field in two experiments in Kenya; one in...Read complete abstract

Primary Author: Babiker, USDA-ARS, Small Grains and Potato Germplasm Research Unit, USA

Keywords: ug99, molecular mapping, stem rust

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