The Experts below are selected from a list of 19347 Experts worldwide ranked by ideXlab platform
Ivana Pajac živkovic - One of the best experts on this subject based on the ideXlab platform.
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Durum Wheat cultivars express different level of resistance to granary weevil sitophilus granarius coleoptera curculionidae infestation
Insects, 2020Co-Authors: Darija Lemic, Katarina M Mikac, Matej Genda, željko Jukic, Ivana Pajac živkovicAbstract:The granary weevil, Sitophilus granarius Linnaeus 1875, is a primary pest of stored grains worldwide. Feeding damage and progeny production of S. granarius was estimated to identify the levels of resistance of the insect on different Durum Wheat cultivars. Insect attack on four different Durum Wheat cultivars was investigated over a period of 20 weeks. Durum Wheats were artificially infected with 20 individuals of S. granarius. Every two weeks the sample weight, hectoliter weight, moisture and the number of live weevils, including their number of progenies, were recorded. Overall findings revealed different levels of resistance of different Durum Wheat cultivars to S. granarius infestation. The Primadur cultivar had the highest resistance, followed by the Marco Aurelio and Cesare cultivars followed finally by the Tito Flavio cultivar which was highly susceptible to S. granarius. For all cultivars, apart from Primadur, S. granarius metabolism increased humidity and temperature, leading to grain degradation and resulting in the potential complete loss of market value if under field conditions. Evidently, Durum Wheat characteristics affect the life cycle of S. granarius, primarily their progeny, and thus the damage they undertake to the Wheat itself. These findings are important because they enable the strategic selection of Wheat cultivars that can be stored for a longer time period, while more sensitive Wheat cultivars can be selected for shorter storage time and thus faster delivery to market.
Darija Lemic - One of the best experts on this subject based on the ideXlab platform.
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Durum Wheat cultivars express different level of resistance to granary weevil sitophilus granarius coleoptera curculionidae infestation
Insects, 2020Co-Authors: Darija Lemic, Katarina M Mikac, Matej Genda, željko Jukic, Ivana Pajac živkovicAbstract:The granary weevil, Sitophilus granarius Linnaeus 1875, is a primary pest of stored grains worldwide. Feeding damage and progeny production of S. granarius was estimated to identify the levels of resistance of the insect on different Durum Wheat cultivars. Insect attack on four different Durum Wheat cultivars was investigated over a period of 20 weeks. Durum Wheats were artificially infected with 20 individuals of S. granarius. Every two weeks the sample weight, hectoliter weight, moisture and the number of live weevils, including their number of progenies, were recorded. Overall findings revealed different levels of resistance of different Durum Wheat cultivars to S. granarius infestation. The Primadur cultivar had the highest resistance, followed by the Marco Aurelio and Cesare cultivars followed finally by the Tito Flavio cultivar which was highly susceptible to S. granarius. For all cultivars, apart from Primadur, S. granarius metabolism increased humidity and temperature, leading to grain degradation and resulting in the potential complete loss of market value if under field conditions. Evidently, Durum Wheat characteristics affect the life cycle of S. granarius, primarily their progeny, and thus the damage they undertake to the Wheat itself. These findings are important because they enable the strategic selection of Wheat cultivars that can be stored for a longer time period, while more sensitive Wheat cultivars can be selected for shorter storage time and thus faster delivery to market.
Karim Ammar - One of the best experts on this subject based on the ideXlab platform.
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genome wide association mapping of leaf rust response in a Durum Wheat worldwide germplasm collection
The Plant Genome, 2016Co-Authors: Meriem Aoun, Karim Ammar, J A Kolmer, Shiaoman Chao, Matthew Breiland, Kathryn M Turner, Alexander Loladze, James A Anderson, Maricelis AcevedoAbstract:Leaf rust (caused by Erikss. []) is increasingly impacting Durum Wheat ( L. var. ) production with the recent appearance of races with virulence to widely grown cultivars in many Durum producing areas worldwide. A highly virulent race on Durum Wheat was recently detected in Kansas. This race may spread to the northern Great Plains, where most of the US Durum Wheat is produced. The objective of this study was to identify sources of resistance to several races from the United States and Mexico at seedling stage in the greenhouse and at adult stage in field experiments. Genome-wide association study (GWAS) was used to identify single-nucleotide polymorphism (SNP) markers associated with leaf rust response in a worldwide Durum Wheat collection of 496 accessions. Thirteen accessions were resistant across all experiments. Association mapping revealed 88 significant SNPs associated with leaf rust response. Of these, 33 SNPs were located on chromosomes 2A and 2B, and 55 SNPs were distributed across all other chromosomes except for 1B and 7B. Twenty markers were associated with leaf rust response at seedling stage, while 68 markers were associated with leaf rust response at adult plant stage. The current study identified a total of 14 previously uncharacterized loci associated with leaf rust response in Durum Wheat. The discovery of these loci through association mapping (AM) is a significant step in identifying useful sources of resistance that can be used to broaden the relatively narrow leaf rust resistance spectrum in Durum Wheat germplasm.
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response to drought and heat stress on Wheat quality with special emphasis on bread making quality in Durum Wheat
Field Crops Research, 2016Co-Authors: Carlos Guzman, Karim Ammar, Ravi P Singh, Jorge E Autrique, Suchismita Mondal, Velu Govindan, Anayeli Moralesdorantes, Gabriel Posadasromano, Jose Crossa, Roberto J PenaAbstract:Durum Wheat accounts for more than 50% of the total Wheat-growing area in the Mediterranean region, where is used for the preparation of diverse food products, including pasta and bread. The effects of drought and heat stresses on grain morphology, grain composition (protein, iron and zinc micronutrients), processing and pasta and bread-making quality in Durum Wheat varieties were analyzed. The results revealed significant differences among the genotypes, as well as unique responses to the environmental stresses. Micronutrients concentration (iron and zinc), processing and pasta-making quality was favored by drought but not by heat stress. Overall, the Durum Wheat lines showed inferior values for bread volume compared to the bread-Wheat checks. However, some Durum genotypes in specific environment had almost the same performance. To develop Durum Wheat cultivars with similar bread-making quality to that of bread Wheat, it is necessary to achieve a better balance of tenacity and extensibility. The development of Durum lines with good bread-making quality could increase the commercial value of this crop.
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association mapping of leaf rust response in Durum Wheat
Molecular Breeding, 2010Co-Authors: Marco Maccaferri, Maria Corinna Sanguineti, Paola Mantovani, A Demontis, A Massi, Karim Ammar, J A Kolmer, Jerzy H Czembor, Smadar Ezrati, Roberto TuberosaAbstract:Resistance to leaf rust (Puccinia triticina Eriks.) is a main objective for Durum Wheat (Triticum Durum Desf.) breeding. Association mapping on germplasm collections is now being used as an additional approach for the discovery and validation of major genes/QTLs. In this study, a collection of 164 elite Durum Wheat accessions suitable for association mapping has been tested for leaf rust response at the seedling stage and under field conditions (adult plant stage). Seedling tests were carried out with 25 selected isolates from Durum Wheat, bread Wheat and triticale, while field experiments were carried out in artificially inoculated plots in Italy and in Mexico. The collection has been profiled with 225 simple sequence repeat (SSR) loci of known map position and a PCR assay targeting Ppd-A1. Associations showing highly consistent experiment-wise significances across leaf rust isolates and field trials were mainly detected for the 7BL distal chromosome (chr.) region (harbouring Lr14 from cultivar Llareta INIA and QLr.ubo-7B.2 from cultivar Creso) and for two chr. regions located in chrs. 2A and 2B. Additionally, isolate-specific associations and/or associations with smaller effects in the field trials were identified in most of the chromosomes. The chr. 7BL distal region was investigated in detail through haplotyping with 15 SSR markers, revealing that the Creso and Llareta INIA alleles are identical by descent at 6 adjacent SSR loci in the most distal 7BL region spanning 8 cM. Association mapping allowed us to further refine the map location of the Lr14/QLr.ubo-7B.2 resistance gene to the most distal region of the linkage group, tagged by Xcfa2257.2, Xgwm344.2 and Xwmc10. The resistant haplotype is present in a number of accessions (ca. 15% of the accessions included in the collection) from the Italian, CIMMYT and ICARDA breeding programmes. Therefore, this chr. 7BL region can be considered as the most important source of resistance to leaf rust currently exploited by Durum breeders in the Mediterranean areas. Furthermore, the field trials at the adult plant stage allowed us to identify marker associations (e.g. chrs. 2BL and 3BS, proximal regions; chr. 7BS, distal region) which suggest the presence of minor QTLs for slow-rusting resistance.
Katarina M Mikac - One of the best experts on this subject based on the ideXlab platform.
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Durum Wheat cultivars express different level of resistance to granary weevil sitophilus granarius coleoptera curculionidae infestation
Insects, 2020Co-Authors: Darija Lemic, Katarina M Mikac, Matej Genda, željko Jukic, Ivana Pajac živkovicAbstract:The granary weevil, Sitophilus granarius Linnaeus 1875, is a primary pest of stored grains worldwide. Feeding damage and progeny production of S. granarius was estimated to identify the levels of resistance of the insect on different Durum Wheat cultivars. Insect attack on four different Durum Wheat cultivars was investigated over a period of 20 weeks. Durum Wheats were artificially infected with 20 individuals of S. granarius. Every two weeks the sample weight, hectoliter weight, moisture and the number of live weevils, including their number of progenies, were recorded. Overall findings revealed different levels of resistance of different Durum Wheat cultivars to S. granarius infestation. The Primadur cultivar had the highest resistance, followed by the Marco Aurelio and Cesare cultivars followed finally by the Tito Flavio cultivar which was highly susceptible to S. granarius. For all cultivars, apart from Primadur, S. granarius metabolism increased humidity and temperature, leading to grain degradation and resulting in the potential complete loss of market value if under field conditions. Evidently, Durum Wheat characteristics affect the life cycle of S. granarius, primarily their progeny, and thus the damage they undertake to the Wheat itself. These findings are important because they enable the strategic selection of Wheat cultivars that can be stored for a longer time period, while more sensitive Wheat cultivars can be selected for shorter storage time and thus faster delivery to market.
Matej Genda - One of the best experts on this subject based on the ideXlab platform.
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Durum Wheat cultivars express different level of resistance to granary weevil sitophilus granarius coleoptera curculionidae infestation
Insects, 2020Co-Authors: Darija Lemic, Katarina M Mikac, Matej Genda, željko Jukic, Ivana Pajac živkovicAbstract:The granary weevil, Sitophilus granarius Linnaeus 1875, is a primary pest of stored grains worldwide. Feeding damage and progeny production of S. granarius was estimated to identify the levels of resistance of the insect on different Durum Wheat cultivars. Insect attack on four different Durum Wheat cultivars was investigated over a period of 20 weeks. Durum Wheats were artificially infected with 20 individuals of S. granarius. Every two weeks the sample weight, hectoliter weight, moisture and the number of live weevils, including their number of progenies, were recorded. Overall findings revealed different levels of resistance of different Durum Wheat cultivars to S. granarius infestation. The Primadur cultivar had the highest resistance, followed by the Marco Aurelio and Cesare cultivars followed finally by the Tito Flavio cultivar which was highly susceptible to S. granarius. For all cultivars, apart from Primadur, S. granarius metabolism increased humidity and temperature, leading to grain degradation and resulting in the potential complete loss of market value if under field conditions. Evidently, Durum Wheat characteristics affect the life cycle of S. granarius, primarily their progeny, and thus the damage they undertake to the Wheat itself. These findings are important because they enable the strategic selection of Wheat cultivars that can be stored for a longer time period, while more sensitive Wheat cultivars can be selected for shorter storage time and thus faster delivery to market.
