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Talbot SC, Vining KJ, Snelling JW, Clevenger J, Mehlenbacher SA. A haplotype-resolved chromosome-level assembly and annotation of European hazelnut (C. avellana cv. Jefferson) provides insight into mechanisms of eastern filbert blight resistance. G3 (Bethesda) 2024:jkae021. [PMID: 38325326 DOI: 10.1093/g3journal/jkae021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 12/11/2023] [Accepted: 01/05/2024] [Indexed: 02/09/2024]
Abstract
European hazelnut (Corylus avellana L.) is an important tree nut crop. Hazelnut production in North America is currently limited in scalability due to Anisogramma anomala, a fungal pathogen that causes Eastern Filbert Blight (EFB) disease in hazelnut. Successful deployment of EFB resistant cultivars has been limited to the state of Oregon, where the breeding program at Oregon State University (OSU) has released cultivars with a dominant allele at a single resistance locus identified by classical breeding, linkage mapping, and molecular markers. 'Jefferson' is resistant to the predominant EFB biotype in Oregon and has been selected by the OSU breeding program as a model for hazelnut genetic and genomic research. Here, we present a near complete, haplotype-resolved chromosome-level hazelnut genome assembly for C. avellana 'Jefferson'. This new assembly is a significant improvement over a previously published genome draft. Analysis of genomic regions linked to EFB resistance and self-incompatibility confirmed haplotype splitting and identified new gene candidates that are essential for downstream molecular marker development, thereby facilitating breeding efforts.
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Affiliation(s)
- Samuel C Talbot
- Department of Horticulture, Oregon State University, 4017 Agriculture and Life Sciences Building, Corvallis, OR 97331, USA
| | - Kelly J Vining
- Department of Horticulture, Oregon State University, 4017 Agriculture and Life Sciences Building, Corvallis, OR 97331, USA
| | - Jacob W Snelling
- Department of Horticulture, Oregon State University, 4017 Agriculture and Life Sciences Building, Corvallis, OR 97331, USA
| | - Josh Clevenger
- Hudson Alpha Institute for Biotechnology, 601 Genome Way Northwest, Huntsville, AL 35806, USA
| | - Shawn A Mehlenbacher
- Department of Horticulture, Oregon State University, 4017 Agriculture and Life Sciences Building, Corvallis, OR 97331, USA
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Cristofori V, Botta R, Rovira M, Molnar TJ, Mehlenbacher SA. Editorial: Recent advances in hazelnut ( Corylus spp.). Front Plant Sci 2023; 13:1120595. [PMID: 36684751 PMCID: PMC9847355 DOI: 10.3389/fpls.2022.1120595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Affiliation(s)
- Valerio Cristofori
- Department of Agricultural and Forest Sciences (DAFNE), University of Tuscia, Viterbo, Italy
| | - Roberto Botta
- Department of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Grugliasco, Italy
| | - Mercè Rovira
- Institute of Agrifood Research and Technology ( Institut de Recerca i Tecnologia Agroalimentàries (IRTA) - Mas Bové), Constantí, Spain
| | - Thomas J. Molnar
- Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ, United States
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Vahdati K, Sarikhani S, Arab MM, Leslie CA, Dandekar AM, Aletà N, Bielsa B, Gradziel TM, Montesinos Á, Rubio-Cabetas MJ, Sideli GM, Serdar Ü, Akyüz B, Beccaro GL, Donno D, Rovira M, Ferguson L, Akbari M, Sheikhi A, Sestras AF, Kafkas S, Paizila A, Roozban MR, Kaur A, Panta S, Zhang L, Sestras RE, Mehlenbacher SA. Advances in Rootstock Breeding of Nut Trees: Objectives and Strategies. Plants (Basel) 2021; 10:plants10112234. [PMID: 34834597 PMCID: PMC8623031 DOI: 10.3390/plants10112234] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 10/06/2021] [Accepted: 10/15/2021] [Indexed: 05/31/2023]
Abstract
The production and consumption of nuts are increasing in the world due to strong economic returns and the nutritional value of their products. With the increasing role and importance given to nuts (i.e., walnuts, hazelnut, pistachio, pecan, almond) in a balanced and healthy diet and their benefits to human health, breeding of the nuts species has also been stepped up. Most recent fruit breeding programs have focused on scion genetic improvement. However, the use of locally adapted grafted rootstocks also enhanced the productivity and quality of tree fruit crops. Grafting is an ancient horticultural practice used in nut crops to manipulate scion phenotype and productivity and overcome biotic and abiotic stresses. There are complex rootstock breeding objectives and physiological and molecular aspects of rootstock-scion interactions in nut crops. In this review, we provide an overview of these, considering the mechanisms involved in nutrient and water uptake, regulation of phytohormones, and rootstock influences on the scion molecular processes, including long-distance gene silencing and trans-grafting. Understanding the mechanisms resulting from rootstock × scion × environmental interactions will contribute to developing new rootstocks with resilience in the face of climate change, but also of the multitude of diseases and pests.
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Affiliation(s)
- Kourosh Vahdati
- Department of Horticulture, College of Aburaihan, University of Tehran, Tehran 3391653755, Iran; (S.S.); (M.M.A.); (M.R.R.)
| | - Saadat Sarikhani
- Department of Horticulture, College of Aburaihan, University of Tehran, Tehran 3391653755, Iran; (S.S.); (M.M.A.); (M.R.R.)
| | - Mohammad Mehdi Arab
- Department of Horticulture, College of Aburaihan, University of Tehran, Tehran 3391653755, Iran; (S.S.); (M.M.A.); (M.R.R.)
| | - Charles A. Leslie
- Department of Plant Sciences, University of California Davis, One Shields, Avenue, Davis, CA 95616, USA; (C.A.L.); (A.M.D.); (T.M.G.); (G.M.S.); (L.F.)
| | - Abhaya M. Dandekar
- Department of Plant Sciences, University of California Davis, One Shields, Avenue, Davis, CA 95616, USA; (C.A.L.); (A.M.D.); (T.M.G.); (G.M.S.); (L.F.)
| | - Neus Aletà
- Institut de Recerca i Tecnologia Agroalimentàries, IRTA Fruit Production, Torre Marimon, 08140 Caldes de Montbui, Spain;
| | - Beatriz Bielsa
- Unidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón, Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), Av. Montañana 930, 50059 Zaragoza, Spain; (B.B.); (Á.M.); (M.J.R.-C.)
| | - Thomas M. Gradziel
- Department of Plant Sciences, University of California Davis, One Shields, Avenue, Davis, CA 95616, USA; (C.A.L.); (A.M.D.); (T.M.G.); (G.M.S.); (L.F.)
| | - Álvaro Montesinos
- Unidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón, Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), Av. Montañana 930, 50059 Zaragoza, Spain; (B.B.); (Á.M.); (M.J.R.-C.)
| | - María José Rubio-Cabetas
- Unidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón, Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), Av. Montañana 930, 50059 Zaragoza, Spain; (B.B.); (Á.M.); (M.J.R.-C.)
- Instituto Agroalimentario de Aragón–IA2 (CITA-Universidad de Zaragoza), 50059 Zaragoza, Spain
| | - Gina M. Sideli
- Department of Plant Sciences, University of California Davis, One Shields, Avenue, Davis, CA 95616, USA; (C.A.L.); (A.M.D.); (T.M.G.); (G.M.S.); (L.F.)
| | - Ümit Serdar
- Department of Horticulture, Faculty of Agriculture, Ondokuz Mayıs University, Samsun 55139, Turkey; (Ü.S.); (B.A.)
| | - Burak Akyüz
- Department of Horticulture, Faculty of Agriculture, Ondokuz Mayıs University, Samsun 55139, Turkey; (Ü.S.); (B.A.)
| | - Gabriele Loris Beccaro
- Department of Agricultural, Forest and Food Sciences, University of Torino, 10124 Torino, Italy; (G.L.B.); (D.D.)
| | - Dario Donno
- Department of Agricultural, Forest and Food Sciences, University of Torino, 10124 Torino, Italy; (G.L.B.); (D.D.)
| | - Mercè Rovira
- Institut de Recerca i Tecnologia Agroalimentàries, IRTA Fruit Production, Mas Bové, Ctra. Reus-El Morell, Km. 3.8, 43120 Constantí, Spain;
| | - Louise Ferguson
- Department of Plant Sciences, University of California Davis, One Shields, Avenue, Davis, CA 95616, USA; (C.A.L.); (A.M.D.); (T.M.G.); (G.M.S.); (L.F.)
| | | | - Abdollatif Sheikhi
- Department of Horticultural Sciences, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan 7718897111, Iran;
| | - Adriana F. Sestras
- Faculty of Horticulture, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania;
| | - Salih Kafkas
- Department of Horticulture, Faculty of Agriculture, Cukurova University, Adana 01380, Turkey; (S.K.); (A.P.)
| | - Aibibula Paizila
- Department of Horticulture, Faculty of Agriculture, Cukurova University, Adana 01380, Turkey; (S.K.); (A.P.)
| | - Mahmoud Reza Roozban
- Department of Horticulture, College of Aburaihan, University of Tehran, Tehran 3391653755, Iran; (S.S.); (M.M.A.); (M.R.R.)
| | - Amandeep Kaur
- Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078, USA; (A.K.); (S.P.); (L.Z.)
| | - Srijana Panta
- Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078, USA; (A.K.); (S.P.); (L.Z.)
| | - Lu Zhang
- Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078, USA; (A.K.); (S.P.); (L.Z.)
| | - Radu E. Sestras
- Faculty of Horticulture, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania;
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Komaei Koma G, Şekerli M, Snelling JW, Mehlenbacher SA. New Sources of Eastern Filbert Blight Resistance and Simple Sequence Repeat Markers on Linkage Group 6 in Hazelnut ( Corylus avellana L.). Front Plant Sci 2021; 12:684122. [PMID: 34194458 PMCID: PMC8238048 DOI: 10.3389/fpls.2021.684122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/17/2021] [Indexed: 06/13/2023]
Abstract
Commercial production of hazelnut (Corylus avellana) in Oregon's Willamette Valley is threatened by eastern filbert blight (EFB), a serious canker disease caused by the pyrenomycete Anisogramma anomala (Peck) E. Müller. The fungus also prevents the establishment of hazelnut orchards in eastern North America. Genetic resistance is considered the most effective way to control the disease. A high level of EFB resistance was first discovered in 'Gasaway'. This resistance is conferred by a dominant allele at a single locus on linkage group 6 (LG6). Resistance from several additional sources has been assigned to the same chromosomal region. In this study, new simple sequence repeat (SSR) markers were developed for the resistance region on LG6 and new sources of resistance were investigated. Forty-two new SSR markers were developed from four contigs in the genome sequence of 'Jefferson' hazelnut, characterized, and nine of them were placed on LG6 of the genetic map. Accessions representing 12 new sources of EFB resistance were crossed with susceptible selections resulting in 18 seedling populations. Segregation ratios in the seedling populations fit the expected 1:1 ratio for 10 sources, while one source showed an excess of resistant seedlings and another showed an excess of susceptible seedlings. Based on correlation of disease response and scores of SSR markers in the 'Gasaway' resistance region in the seedlings, eight resistance sources were assigned to LG6. Linkage maps were constructed for each progeny using SSR markers. The LG6 resistance sources include two selections (#23 and #26) from the Russian Research Institute of Forestry and Mechanization near Moscow, four selections from southern Russia, one selection (OSU 1185.126) from Crimea, one selection (OSU 533.129) from Michigan, Corylus heterophylla 'Ogyoo' from the South Korea, and the interspecific hybrid 'Estrella #1'. These new LG6 resistance sources and SSR markers should be useful in breeding new cultivars, including the pyramiding of resistance genes. For the other four resistance sources (Moscow #37, hybrid selection OSU 401.014, C. americana 'Winkler' and C. americana OSU 366.060), SSR marker scores on linkage groups 6, 7 and 2 were not correlated with disease response and merit further investigation.
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Torello Marinoni D, Valentini N, Portis E, Acquadro A, Beltramo C, Mehlenbacher SA, Mockler TC, Rowley ER, Botta R. High density SNP mapping and QTL analysis for time of leaf budburst in Corylus avellana L. PLoS One 2018; 13:e0195408. [PMID: 29608620 PMCID: PMC5880404 DOI: 10.1371/journal.pone.0195408] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 03/21/2018] [Indexed: 01/25/2023] Open
Abstract
The growing area of European hazelnut (Corylus avellana L.) is increasing, as well as the number of producing countries, and there is a pressing need for new improved cultivars. Hazelnut conventional breeding process is slow, due to the length of juvenile phase and the high heterozygosity level. The development of genetic linkage maps and the identification of molecular markers tightly linked to QTL (quantitative trait loci) of agronomic interest are essential tools for speeding up the selection of seedlings carrying desired traits through marker-assisted selection. The objectives of this study were to enrich a previous linkage map and confirm QTL related to time of leaf budburst, using an F1 population obtained by crossing Tonda Gentile delle Langhe with Merveille de Bollwiller. Genotyping-by-Sequencing was used to identify a total of 9,999 single nucleotide polymorphism markers. Well saturated linkage maps were constructed for each parent using the double pseudo-testcross mapping strategy. A reciprocal translocation was detected in Tonda Gentile delle Langhe between two non-homologous chromosomes. Applying a bioinformatic approach, we were able to disentangle ‘pseudo-linkage’ between markers, removing markers around the translocation breakpoints and obtain a linear order of the markers for the two chromosomes arms, for each linkage group involved in the translocation. Twenty-nine QTL for time of leaf budburst were identified, including a stably expressed region on LG_02 of the Tonda Gentile delle Langhe map. The stability of these QTL and their coding sequence content indicates promise for the identification of specific chromosomal regions carrying key genes involved in leaf budburst.
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Affiliation(s)
- Daniela Torello Marinoni
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Grugliasco, Torino, Italy
| | - Nadia Valentini
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Grugliasco, Torino, Italy
| | - Ezio Portis
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Grugliasco, Torino, Italy
- * E-mail:
| | - Alberto Acquadro
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Grugliasco, Torino, Italy
| | - Chiara Beltramo
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Grugliasco, Torino, Italy
| | - Shawn A. Mehlenbacher
- Department of Horticulture, Oregon State University, Corvallis, Oregon, United States of America
| | - Todd C. Mockler
- Donald Danforth Plant Science Center, St. Louis, Missouri, United States of America
| | - Erik R. Rowley
- Donald Danforth Plant Science Center, St. Louis, Missouri, United States of America
| | - Roberto Botta
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Grugliasco, Torino, Italy
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Sathuvalli V, Mehlenbacher SA, Smith DC. High-Resolution Genetic and Physical Mapping of the Eastern Filbert Blight Resistance Region in 'Jefferson' Hazelnut ( Corylus avellana L.). Plant Genome 2017; 10. [PMID: 28724074 DOI: 10.3835/plantgenome2016.12.0123] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Eastern filbert blight (EFB), caused by the pyrenomycete (Peck) E. Müller, is a devastating disease of European hazelnut ( L) in the US Pacific Northwest. A dominant allele at a single locus from the obsolete pollenizer 'Gasaway' confers a high level of resistance to EFB. To identify the gene responsible for resistance, we initiated map-based cloning efforts in a population of 1488 seedlings that segregated for resistance. Chromosome walking was initiated using primers designed from eight previously identified random amplified polymorphic DNA markers linked to resistance. The bacterial artificial chromosome (BAC) library was screened using the primer pairs in a polymerase chain reaction-based pooling and subpooling strategy. Here, we report construction of a high-resolution genetic map and a physical map of the resistance region. Further, we sequenced BACs in the resistance region and identified and annotated the coding sequences. In seven contigs <1 cM from the resistance locus, 233 genes were predicted. The putative genes were compared with sequences in GenBank using a BLASTP search. Fifty-one markers were placed on the high-resolution genetic map, including markers newly developed from the BACs. Segregation in the mapping population placed the resistance locus in a single contig of three BACs (43F13, 66C22, and 85B7). Two of the putative genes are in the p-loop NTPase and F-box super-families localized in a 135-kb BAC, which have previously been shown to have disease-resistance properties. Further mapping, complementation, and expression tests of the genes in these BACs is essential to confirm which confer resistance to EFB.
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Molnar TJ, Walsh E, Capik JM, Sathuvalli V, Mehlenbacher SA, Rossman AY, Zhang N. A Real-Time PCR Assay for Early Detection of Eastern Filbert Blight. Plant Dis 2013; 97:813-818. [PMID: 30722620 DOI: 10.1094/pdis-11-12-1041-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Eastern filbert blight (EFB) is a devastating disease of European hazelnut, Corylus avellana, which causes economic losses in Oregon, where 99% of the U.S. crop is produced. The causal fungus, Anisogramma anomala, is native to eastern North America, where it is found associated with the American hazelnut (C. americana). Although C. americana is tolerant, EFB causes cankers, branch dieback, and death of C. avellana. Detection and identification of A. anomala is time consuming using conventional methods because the fungus can only be cultured from sporulating perithecia and the disease symptoms and signs only show 12 to 16 months after infection. In this study, a TaqMan real-time polymerase chain reaction (PCR) assay based on a ribosomal DNA internal transcribed spacer was developed for A. anomala. The assay was validated with multiple isolates of A. anomala, closely related species, common environmental microorganisms, and over 100 C. avellana samples. The real-time PCR assay detected as low as 0.12 pg of A. anomala genomic DNA, and positively diagnosed EFB on 82% of asymptomatic plants as early as 15 weeks from infection. The real-time PCR assay is more sensitive and faster than traditional diagnostic methods. It can facilitate hazelnut breeding and disease management by early and accurate diagnosis of EFB.
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Affiliation(s)
- Thomas J Molnar
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901
| | - Emily Walsh
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901
| | - John M Capik
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901
| | - Vidyasagar Sathuvalli
- Department of Horticulture, Oregon State University, Corvallis 97331-7304 and Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston 97838
| | | | - Amy Y Rossman
- Systematic Mycology & Microbiology Laboratory, United States Department of Agriculture-Agricultural Research Service, Beltsville, MD 20705
| | - Ning Zhang
- Department of Plant Biology and Pathology and Department of Biochemistry and Microbiology, Rutgers University
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Rowley ER, Fox SE, Bryant DW, Sullivan CM, Priest HD, Givan SA, Mehlenbacher SA, Mockler TC. Assembly and Characterization of the European Hazelnut ‘Jefferson’ Transcriptome. Crop Science 2012; 52:2679-2686. [PMID: 0 DOI: 10.2135/cropsci2012.02.0065] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Affiliation(s)
- Erik R. Rowley
- Dep. of Botany and Plant Pathology and Center for Genome Research and Biocomputing; Oregon State University; Corvallis OR 97331
- The Donald Danforth Plant Science Center; 975 North Warson Road St. Louis MO 63132
| | - Samuel E. Fox
- Dep. of Botany and Plant Pathology and Center for Genome Research and Biocomputing; Oregon State University; Corvallis OR 97331
| | - Douglas W. Bryant
- The Donald Danforth Plant Science Center; 975 North Warson Road St. Louis MO 63132
| | - Christopher M. Sullivan
- Dep. of Botany and Plant Pathology and Center for Genome Research and Biocomputing; Oregon State University; Corvallis OR 97331
| | - Henry D. Priest
- The Donald Danforth Plant Science Center; 975 North Warson Road St. Louis MO 63132
| | - Scott A. Givan
- Informatics Research Core Facility; Molecular Microbiology and Immunology, University of Missouri; Columbia MO 65201
| | | | - Todd C. Mockler
- Dep. of Botany and Plant Pathology and Center for Genome Research and Biocomputing; Oregon State University; Corvallis OR 97331
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Sathuvalli VR, Mehlenbacher SA. A bacterial artificial chromosome library for 'Jefferson' hazelnut and identification of clones associated with eastern filbert blight resistance and pollen-stigma incompatibility. Genome 2011; 54:862-7. [PMID: 21936690 DOI: 10.1139/g11-048] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
European hazelnut (Corylus avellana L.) is the only economically important nut crop in the family Betulaceae. Because of its small genome size (~385 Mb / 1C), relatively short life cycle, availability of a dense linkage map, and amenability to transformation by Agrobacterium, the European hazelnut could serve as a model plant for the Betulaceae. Here we report the construction of a bacterial artificial chromosome (BAC) library for 'Jefferson' hazelnut using the cloning enzyme MboI and the vector pECBAC1 (BamHI site). The library consists of 39,936 clones arrayed in 104,384-well microtitre plates with a mean insert size of 117 kb. The genomic coverage of the library is estimated to be about 12 genome equivalents. This library provides a valuable resource for the map-based cloning of two important genes, the resistance gene from 'Gasaway' that confers resistance to eastern filbert blight caused by the fungus Anisogramma anomala (Peck) E. Müller and the S locus that controls pollen-stigma incompatibility. Fine-resolution mapping near the two loci was carried out using random amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) markers. Fine mapping at the disease resistance locus showed that markers W07-375 and X01-825 flanked the resistance locus at distances of 0.06 and 0.05 cM, respectively. The S locus is flanked by markers 204-950 and KG819-200 at distances of 0.14 and 0.24 cM, respectively. Assuming that 1 cM corresponds to a physical distance of 430 kb, it will take approximately two to three chromosome walks to assemble BAC contigs that span both loci.
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Mehlenbacher SA, Brown RN, Nouhra ER, Gökirmak T, Bassil NV, Kubisiak TL. A genetic linkage map for hazelnut (Corylus avellana L.) based on RAPD and SSR markers. Genome 2006; 49:122-33. [PMID: 16498462 DOI: 10.1139/g05-091] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A linkage map for European hazelnut (Corylus avellana L.) was constructed using random amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) markers and the 2-way pseudotestcross approach. A full-sib population of 144 seedlings from the cross OSU 252.146 x OSU 414.062 was used. RAPD markers in testcross configuration, segregating 1:1, were used to construct separate maps for each parent. Fifty additional RAPD loci were assigned to linkage groups as accessory markers whose exact location could not be determined. Markers in intercross configuration, segregating 3:1, were used to pair groups in one parent with their homologues in the other. Eleven groups were identified for each parent, corresponding to the haploid chromosome number of hazelnut (n = x = 11). Thirty of the 31 SSR loci were able to be assigned to a linkage group. The maternal map included 249 RAPD and 20 SSR markers and spanned a distance of 661 cM. The paternal map included 271 RAPD and 28 SSR markers and spanned a distance of 812 cM. The maps are quite dense, with an average of 2.6 cM between adjacent markers. The S-locus, which controls pollen-stigma incompatibility, was placed on chromosome 5S where 6 markers linked within a distance of 10 cM were identified. A locus for resistance to eastern filbert blight, caused by Anisogramma anomala, was placed on chromosome 6R for which two additional markers tightly linked to the dominant allele were identified and sequenced. These maps will serve as a starting point for future studies of the hazelnut genome, including map-based cloning of important genes. The inclusion of SSR loci on the map will make it useful in other populations.
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Affiliation(s)
- Shawn A Mehlenbacher
- Department of Horticulture, Oregon State University, 4017 Agricultural and Life Sciences Building, Corvallis, OR 97331-7304, USA.
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Mehlenbacher SA, Brown RN, Davis JW, Chen H, Bassil NV, Smith DC, Kubisiak TL. RAPD markers linked to eastern filbert blight resistance in Corylus avellana. Theor Appl Genet 2004; 108:651-656. [PMID: 14569427 DOI: 10.1007/s00122-003-1476-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2003] [Accepted: 09/10/2003] [Indexed: 05/24/2023]
Abstract
A total of 1,110 decamer primers were screened for RAPD markers linked to a dominant allele in hazelnut ( Corylus avellana) that confers resistance to eastern filbert blight caused by Anisogramma anomala. Twenty RAPD markers linked in coupling, and five markers linked in repulsion, were found. A seedling population was used to construct a linkage map of the region flanking the resistance locus. The map spans 46.6 cM, with 14 markers on one side of the resistance locus and eight on the other side. Eleven markers showed less than 3% recombination with resistance, including three that showed no recombination. Seven of these 11 markers are sufficiently robust to allow their use in marker-assisted selection. These include AA12(850) which shows no recombination, and six markers on one side of the resistance locus: 173(500), 152(800), 122(825), 275(1130), H19(650) and O16(1250). Marker 268(580), which flanks the resistance locus on the other side, is also suitable for use in marker-assisted selection, but shows 5.8% recombination with resistance. Other markers are less suitable for marker-assisted selection because of sensitivity to changes in primer or MgCl(2) concentration, or the long time required for electrophoresis to separate bands of similar size. The 16 markers closest to the resistance locus were cloned and sequenced. The W07(365) marker, which showed no recombination with the resistance locus but is difficult to score, includes a CT microsatellite repeat. The sequence information will allow the design of SCAR primers and eventual map-based cloning of the resistance allele.
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Affiliation(s)
- S A Mehlenbacher
- Department of Horticulture, Oregon State University, 4017 ALS Building, Corvallis, OR 97331, USA.
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Abstract
Inheritance of resistance to eastern filbert blight, caused by Anisogramma anomala, in European hazelnut (Corylus avellana) was evaluated in the progeny of seven cultivars crossed in 12 combinations. The progeny were subjected to inoculation with A. anomala in the greenhouse and in the field. Three disease responses were measured: disease incidence, number of cankers, and proportion of wood diseased. In both the greenhouse and the field, progeny produced by crossing VR6-28 with three susceptible cultivars segregated 1:1 for complete resistance to eastern filbert blight, confirming a previous report that VR6-28 is heterozygous for a single, dominant resistance gene. Histograms of disease responses in progeny of the remaining six parents showed continuous distributions for all crosses examined. Consequently, these parents were analyzed for general and specific combining abilities for each disease response. In the field, general and specific combining ability were both significant (P < 0.05) for all disease responses, with general combining ability having twice the magnitude of specific combining ability. These results suggest these disease responses are controlled by additive gene action in the cultivars examined, with nonadditive gene action being of some importance. Based on general combining ability values, high levels of partial resistance were transmitted by the pollen parents, Gem and Tonda di Giffoni, and the seed parent, Willamette. Heritability of disease incidence, number of cankers, and proportion of wood diseased were calculated to be 0.21, 0.39, and 0.47, respectively, for this set of nine crosses after the first exposure period in the field. This suggests that it will be possible to use partially resistant parents to breed for hazelnuts exhibiting fewer and smaller cankers.
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Affiliation(s)
| | | | - S A Mehlenbacher
- Department of Horticulture, Oregon State University, Corvallis 97331-2902
| | - T L Sawyer
- Department of Botany and Plant Pathology, Oregon State University, Corvallis 97331-2902
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Mehlenbacher SA, Thompson MM. Dominance relationships among S-alleles in Corylus avellana L. Theor Appl Genet 1988; 76:669-72. [PMID: 24232343 DOI: 10.1007/bf00303511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/1988] [Accepted: 06/25/1988] [Indexed: 05/20/2023]
Abstract
Pollen-stigma compatibility relationship were studied in 50 cultivars and more than 800 seedlings of the European hazelnut (Corylus avellana L.). A total of 22 unique S-alleles have been identified. Dominance relationships in 75 of the possible 231 pairs of alleles have been determined in both pistil and pollen. In the pistil, all alleles exhibited independent action, whereas in the pollen, alleles exhibited either dominance or codominance. The dominance relationship was linear with 7 levels of dominance.
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Affiliation(s)
- S A Mehlenbacher
- Department of Horticulture, Oregon State University, 97331, Corvallis, OR, USA
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