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Hordeum OR Barley QTL

Haiyang Wang, Lana Shabala, Meixue Zhou, Sergey Shabala
Background: More than 20% of the world's agricultural land is affected by salinity, resulting in multibillion-dollar penalties and jeopardising food security. While the recent progress in molecular technologies has significantly advanced plant breeding for salinity stress tolerance, accurate plant phenotyping remains a bottleneck of many breeding programs. We have recently shown the existence of a strong causal link between salinity and oxidative stress tolerance in cereals (wheat and barley)...
2019: Plant Methods
Mian Zhang, Man-Man Fu, Cheng-Wei Qiu, Fangbin Cao, Zhong-Hua Chen, Guoping Zhang, Feibo Wu
Tibetan wild barley has been identified to show large genetic variation and stress tolerance. A genome-wide association (GWA) analysis was performed to detect quantitative trait loci (QTLs) for drought tolerance using 777 Diversity Array Technology (DArT) markers and morphological and physiological traits of 166 Tibetan wild barley accessions in both hydroponic and pot experiments. Large genotypic variation for these traits was found; and population structure and kinship analysis identified three subpopulations among these barley genotypes...
February 12, 2019: International Journal of Molecular Sciences
Muhammad Bilal Gill, Fanrong Zeng, Lana Shabala, Guoping Zhang, Min Yu, Vadim Demidchik, Sergey Shabala, Meixue Zhou
Waterlogging is a serious environmental problem that limits agricultural production in low-lying rainfed areas around the world. The major constraint that plants face in a waterlogging situation is the reduced oxygen availability. Accordingly, all previous efforts of plant breeders focused on traits providing adequate supply of oxygen to roots under waterlogging conditions, such as enhanced aerenchyma formation or reduced radial oxygen loss. However, reduced oxygen concentration in waterlogged soils also leads to oxygen deficiency in plant tissues, resulting in an excessive accumulation of reactive oxygen species (ROS) in plants...
February 6, 2019: International Journal of Molecular Sciences
Inger Åhman, Therése Bengtsson
Long-term pre-breeding using Hordeum vulgare ssp. spontaneum as a donor of bird cherry-oat aphid resistance has resulted in agronomically improved resistance sources of barley along with easy-to-use molecular markers. Bird cherry-oat aphid (Rhopalosiphum padi L.) is a pest and a virus vector in barley to which there are no bred-resistant cultivars. The present study describes how resistance from Hordeum vulgare ssp. spontaneum has been introgressed in cultivated barley via five successive crosses with the same cultivar Lina (BC) and in parallel with other more modern barley cultivars...
February 2, 2019: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Asuka Kodama, Ryouhei Narita, Makoto Yamaguchi, Hiroshi Hisano, Shunsuke Adachi, Hiroki Takagi, Taiichiro Ookawa, Kazuhiro Sato, Tadashi Hirasawa
Enhancing salt stress tolerance is a key strategy for increasing global food production. We previously found that long-term salinity stress significantly reduced grain fertility in the salt-sensitive barley ( Hordeum vulgare ) accession, 'OUC613', but not in the salt-tolerant accession, 'OUE812', resulting in large differences in grain yield. Here, we examined the underlying causes of the difference in grain fertility between these accessions under long-term treatment with 150 or 200 mM NaCl from the seedling stage to harvest and identified quantitative trait loci (QTLs) for maintaining grain fertility...
December 2018: Breeding Science
Ben Ward, Chris Brien, Helena Oakey, Allison Pearson, Sónia Negrão, Rhiannon K Schilling, Julian Taylor, David Jarvis, Andy Timmins, Stuart J Roy, Mark Tester, Bettina Berger, Anton van den Hengel
To optimize shoot growth and structure of cereals, we need to understand the genetic components controlling initiation and elongation. While measuring total shoot growth at high-throughput using 2D imaging has progressed, recovering the 3D shoot structure of small grain cereals at a large scale is still challenging. Here, we present a method for measuring defined individual leaves of cereals, such as wheat and barley, using few images. Plant shoot modelling over time was used to measure the initiation and elongation of leaves in a bi-parental barley mapping population under low and high soil salinity...
January 2, 2019: Plant Journal: for Cell and Molecular Biology
Max Coulter, Bianca Büttner, Kerstin Hofmann, Micha Bayer, Luke Ramsay, Günther Schweizer, Robbie Waugh, Mark E Looseley, Anna Avrova
Major resistance gene to rhynchosporium, Rrs18, maps close to the telomere on the short arm of chromosome 6H in barley. Rhynchosporium or barley scald caused by a fungal pathogen Rhynchosporium commune is one of the most destructive and economically important diseases of barley in the world. Testing of Steptoe × Morex and CIho 3515 × Alexis doubled haploid populations has revealed a large effect QTL for resistance to R. commune close to the telomere on the short arm of chromosome 6H, present in both populations...
December 13, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Calum Watt, Gaofeng Zhou, Lee-Anne McFawn, Kenneth James Chalmers, Chengdao Li
A major grain length QTL on chromosome 5H was fine mapped from 180.5 to 1.7 Mb. Quantitative trait loci (QTLs) mapping has been used extensively in barley to detect QTLs that underlie complex traits such as grain size. In the present study, we utilised 312 double haploid lines derived from a cross between two Australian malting varieties, Vlamingh and Buloke, to dissect the genetic control of a number of grain size characteristics. Digital image analysis was used to measure grain size characteristics including length, width, thickness and plumpness which are important traits influencing barley yield and grain physical quality...
November 21, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Junmei Wang, Jianming Yang, Wei Hua, Xiaojian Wu, Jinghuan Zhu, Yi Shang, Meixue Zhou
Pasting properties are important characteristics of barley starch from a processing standpoint. Many studies reported the close relationship between pasting properties and malting quality, especially malt extract. However, most conclusions were derived from the correlation between pasting properties and malting quality using a set of cultivars or breeding lines. In this study, a doubled haploid population of 150 lines from a cross between a Japanese malting barley and a Chinese feed barley was grown in four different environments (two sites × two years)...
November 12, 2018: International Journal of Molecular Sciences
Lidija Begović, Ivan Abičić, Alojzije Lalić, Hrvoje Lepeduš, Vera Cesar, Dunja Leljak-Levanić
Since lignin greatly affects stem strength, which is an important agronomical trait, understanding the relationship between lodging resistance and lignin synthesis is important in barley breeding and selection processes. The aim of the study was to reveal the connection between physiological aspects of lignin synthesis and genetic background of barley cultivars with different lodging phenotype. Three barley cultivars Astor, Scarlett and Jaran were compared by measuring lignin, cellulose and total soluble phenolics content, phenylalanine ammonia-lyase activity (PAL) and expression of cinnamoyl-CoA reductase (CCR) and cinnamyl-alcohol dehydrogenase (CAD) in three lower internodes at flowering and grain filling stage...
December 2018: Plant Physiology and Biochemistry: PPB
Samar G Thabet, Yasser S Moursi, Mohamed A Karam, Andreas Graner, Ahmad M Alqudah
Drought is one of the harshest abiotic stresses hindering seed germination, plant growth, and crop productivity. A high rate and uniformity of germination under stressful conditions are vital for crop establishment and growth; thus, for productivity. A better understanding of the genetic architecture of seed germination under drought stress is a prerequisite for further increasing yield potential. Barley is considered one of the most abiotic stresses-tolerant cereals. Elucidating the drought tolerance of barley during seed germination would indeed pave the way towards improving the performance of all cereals...
2018: PloS One
Yunfeng Jiang, Ahsan Habib, Zhi Zheng, Meixue Zhou, Yuming Wei, You-Liang Zheng, Chunji Liu
This study demonstrates the feasibility of developing co-segregating markers and identifying candidate genes for Fusarium crown rot resistance in barley based on the generation and exploitation of a near-isogenic line-derived large population. Fusarium crown rot (FCR) is a chronic and severe disease in cereals in semi-arid regions worldwide. Previous studies showed that FCR assessment could be affected by many factors including plant height, growth rate as well as drought stress. Thus, accurate assessment, which is essential for detailed mapping of any locus conferring FCR resistance, is difficult...
October 16, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Yadong Huang, Matthew Haas, Shane Heinen, Brian J Steffenson, Kevin P Smith, Gary J Muehlbauer
Fusarium head blight (FHB) is an important fungal disease affecting the yield and quality of barley and other small grains. Developing and deploying resistant barley cultivars is an essential component of an integrated strategy for reducing the adverse effects of FHB. Genetic mapping studies have revealed that resistance to FHB and the accumulation of pathogen-produced mycotoxins are controlled by many quantitative trait loci (QTL) with minor effects and are highly influenced by plant morphological traits and environmental conditions...
2018: Frontiers in Plant Science
Sanjiv Gupta, Elysia Vassos, Beata Sznajder, Rebecca Fox, Kelvin H P Khoo, Robert Loughman, Kenneth J Chalmers, Diane E Mather
Adult plant resistance against plant pathogens is of interest as a means to achieve durable resistance. Prior to this research, the barley lines CLE210 (from Uruguay) and Denar (from the Czech Republic) had been reported to exhibit adult-plant resistance against powdery mildew. Here, populations of doubled haploid lines from crosses of these lines with the susceptible cultivar Baudin were evaluated for powdery mildew resistance in field experiments. Using linkage maps constructed from genotyping-by-sequencing (GBS) data, it was determined that differences in resistance were largely attributable to a region on the long arm of chromosome 5H (5HL)...
2018: Molecular Breeding: New Strategies in Plant Improvement
Ming Wang, Martin Schäfer, Dapeng Li, Rayko Halitschke, Chuanfu Dong, Erica McGale, Christian Paetz, Yuanyuan Song, Suhua Li, Junfu Dong, Sven Heiling, Karin Groten, Philipp Franken, Michael Bitterlich, Maria J Harrison, Uta Paszkowski, Ian T Baldwin
High-through-put (HTP) screening for functional arbuscular mycorrhizal fungi (AMF)-associations is challenging because roots must be excavated and colonization evaluated by transcript analysis or microscopy. Here we show that specific leaf-metabolites provide broadly applicable accurate proxies of these associations, suitable for HTP-screens. With a combination of untargeted and targeted metabolomics, we show that shoot accumulations of hydroxy- and carboxyblumenol C-glucosides mirror root AMF-colonization in Nicotiana attenuata plants...
August 28, 2018: ELife
Mark E Looseley, Lucie L Griffe, Bianca Büttner, Kathryn M Wright, Jill Middlefell-Williams, Hazel Bull, Paul D Shaw, Malcolm Macaulay, Allan Booth, Günther Schweizer, Joanne R Russell, Robbie Waugh, William T B Thomas, Anna Avrova
Association analyses of resistance to Rhynchosporium commune in a collection of European spring barley germplasm detected 17 significant resistance quantitative trait loci. The most significant association was confirmed as Rrs1. Rhynchosporium commune is a fungal pathogen of barley which causes a highly destructive and economically important disease known as rhynchosporium. Genome-wide association mapping was used to investigate the genetic control of host resistance to R. commune in a collection of predominantly European spring barley accessions...
December 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Zhenqi Su, Sujuan Jin, Dadong Zhang, Guihua Bai
Functional markers were developed based on the critical sequence deletion of TaHRC in the Fhb1 region and validated to be diagnostic in a worldwide wheat collection. Wheat Fusarium head blight (FHB) is a devastating disease in wheat and barley worldwide. Growing FHB-resistant cultivars is an effective strategy to minimize FHB damage in wheat production. Fhb1 is a quantitative trait locus for FHB resistance with the largest effect on disease severity identified to date. With this study, we developed diagnostic DNA markers for Fhb1 by comparing the genomic sequences in Fhb1 region between near-isogenic lines contrasting in Fhb1 alleles and phenotypic effects of the markers...
November 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Shumaila Muzammil, Asis Shrestha, Said Dadshani, Klaus Pillen, Shahid Siddique, Jens Léon, Ali Ahmad Naz
Water scarcity is a critical threat to global crop production. Here, we used the natural diversity of barley ( Hordeum vulgare ) to dissect the genetic control of proline (Pro) mediated drought stress adaptation. Genetic mapping and positional cloning of a major drought-inducible quantitative trait locus ( QPro.S42-1H ) revealed unique allelic variation in pyrroline-5-carboxylate synthase ( P5cs1 ) between the cultivated cultivar Scarlett (ssp. vulgare ) and the wild barley accession ISR42-8 (ssp. spontaneum )...
October 2018: Plant Physiology
Austin J Case, Sridhar Bhavani, Godwin Macharia, Zacharias Pretorius, Vicky Coetzee, Frederik Kloppers, Priyanka Tyagi, Gina Brown-Guedira, Brian J Steffenson
Key message Major stem rust resistance QTLs proposed to be Rpg2 from Hietpas-5 and Rpg3 from GAW-79 were identified in chromosomes 2H and 5H, respectively, and will enhance the diversity of stem rust resistance in barley improvement programs. Stem rust is a devastating disease of cereal crops worldwide. In barley (Hordeum vulgare ssp. vulgare), the disease is caused by two pathogens: Puccinia graminis f. sp. secalis (Pgs) and Puccinia graminis f. sp. tritici (Pgt). In North America, the stem rust resistance gene Rpg1 has protected barley from serious losses for more than 60 years; however, widely virulent Pgt races from Africa in the Ug99 group threaten the crop...
October 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Beata Myśków, Magdalena Góralska, Natalia Lenarczyk, Ilona Czyczyło-Mysza, Stefan Stojałowski
BACKGROUND: Rolling of leaves (RL) is a phenomenon commonly found in grasses. Morphology of the leaf is an important agronomic trait in field crops especially in rice; therefore, majority of the rice breeders are interested in RL. There are only few studies with respect to RL of wheat and barley; however, the information regarding the genetic base of RL with respect to the shape of leaf in rye is lacking. To the best of our knowledge, this is the first study on the localization of loci controlling RL on high density consensus genetic map of rye...
August 9, 2018: BMC Genetics
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