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Liu Y, Liu J, Huang Z, Fan K, Guo X, Xing L, Cao A. Phenotypic characterization and gene mapping of hybrid necrosis in Triticum durum-Haynaldia villosa amphiploids. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2024; 137:185. [PMID: 39009774 PMCID: PMC11249415 DOI: 10.1007/s00122-024-04691-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 07/04/2024] [Indexed: 07/17/2024]
Abstract
KEY MESSAGE Phenotypical, physiological and genetic characterization was carried out on the hybrid necrosis gene from Haynaldia villosa, and the related gene Ne-V was mapped to chromosome arm 2VL. Introducing genetic variation from wild relatives into common wheat through wide crosses is a vital strategy for enriching genetic diversity and promoting wheat breeding. However, hybrid necrosis, a genetic autoimmunity syndrome, often occurs in the offspring of interspecific or intraspecific crosses, restricting both the selection of hybrid parents and the pyramiding of beneficial genes. To utilize the germplasms of Haynaldia villosa (2n = 2x = 14, VV), we conducted wide hybridization between durum wheat (2n = 4x = 28, AABB) and multiple H. villosa accessions to synthesize the amphiploids (2n = 6x = 42, AABBVV). This study revealed that 61.5% of amphiploids derived from the above crosses exhibited hybrid necrosis, with some amphiploids even dying before reaching maturity. However, the initiation time and severity of necrosis varied dramatically among the progenies, suggesting that there were multiple genetic loci or multiple alleles in the same genetic locus conferring to hybrid necrosis in H. villosa accessions. Genetic analysis was performed on the F2 and derived F2:3 populations, which were constructed between amphiploid STH59-1 with normal leaves and amphiploid STH59-2 with necrotic leaves. A semidominant hybrid necrosis-related gene, Ne-V, was mapped to an 11.8-cM genetic interval on the long arm of chromosome 2V, representing a novel genetic locus identified in Triticum-related species. In addition, the hybrid necrosis was correlated with enhanced H2O2 accumulation and cell death, and it was influenced by the temperature and light. Our findings provide a foundation for cloning the Ne-V gene and exploring its molecular mechanism.
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Affiliation(s)
- Yangqi Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Jinhong Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Zhenpu Huang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Kaiwen Fan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Xinshuo Guo
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Liping Xing
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China.
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China.
| | - Aizhong Cao
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University/JCIC-MCP, Nanjing, 210095, China.
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China.
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Degtyaryov E, Pigolev A, Miroshnichenko D, Frolov A, Basnet AT, Gorbach D, Leonova T, Pushin AS, Alekseeva V, Dolgov S, Savchenko T. 12-Oxophytodienoate Reductase Overexpression Compromises Tolerance to Botrytis cinerea in Hexaploid and Tetraploid Wheat. PLANTS (BASEL, SWITZERLAND) 2023; 12:2050. [PMID: 37653967 PMCID: PMC10222670 DOI: 10.3390/plants12102050] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 05/11/2023] [Accepted: 05/17/2023] [Indexed: 09/02/2023]
Abstract
12-Oxophytodienoate reductase is the enzyme involved in the biosynthesis of phytohormone jasmonates, which are considered to be the major regulators of plant tolerance to biotic challenges, especially necrotrophic pathogens. However, we observe compromised tolerance to the necrotrophic fungal pathogen Botrytis cinerea in transgenic hexaploid bread wheat and tetraploid emmer wheat plants overexpressing 12-OXOPHYTODIENOATE REDUCTASE-3 gene from Arabidopsis thaliana, while in Arabidopsis plants themselves, endogenously produced and exogenously applied jasmonates exert a strong protective effect against B. cinerea. Exogenous application of methyl jasmonate on hexaploid and tetraploid wheat leaves suppresses tolerance to B. cinerea and induces the formation of chlorotic damages. Exogenous treatment with methyl jasmonate in concentrations of 100 µM and higher causes leaf yellowing even in the absence of the pathogen, in agreement with findings on the role of jasmonates in the regulation of leaf senescence. Thereby, the present study demonstrates the negative role of the jasmonate system in hexaploid and tetraploid wheat tolerance to B. cinerea and reveals previously unknown jasmonate-mediated responses.
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Affiliation(s)
- Evgeny Degtyaryov
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
| | - Alexey Pigolev
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
| | - Dmitry Miroshnichenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
- Laboratory of Analytical Biochemistry and Biotechnology, Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, 127276 Moscow, Russia
| | - Adi Ti Basnet
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
| | - Daria Gorbach
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
| | - Tatiana Leonova
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany; (A.F.); (A.T.B.); (D.G.); (T.L.)
| | - Alexander S. Pushin
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Valeriya Alekseeva
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Sergey Dolgov
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.S.P.); (V.A.); (S.D.)
| | - Tatyana Savchenko
- Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, 142290 Pushchino, Russia; (E.D.); (A.P.); (D.M.)
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Vaid N, Ishihara H, Plötner B, Sageman-Furnas K, Wiszniewski A, Laitinen RAE. Leaf chlorosis in Arabidopsis thaliana hybrids is associated with transgenerational decline and imbalanced ribosome number. THE NEW PHYTOLOGIST 2020; 228:989-1000. [PMID: 32557724 DOI: 10.1111/nph.16752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/05/2020] [Indexed: 05/09/2023]
Abstract
The interaction of two parental genomes can result in negative outcomes in offspring, also known as hybrid incompatibility. We have previously reported a case in which two recessively interacting alleles result in hybrid chlorosis in Arabidopsis thaliana. A DEAD-box RNA helicase 18 (AtRH18) was identified to be necessary for chlorosis. In this study, we use a sophisticated genetic approach to investigate genes underlying hybrid chlorosis. Sequence comparisons, DNA methylation inhibitor drug treatment and segregation analysis were used to investigate the epigenetic regulation of hybrid chlorosis. Relative rRNA numbers were quantified using real-time quantitative PCR. We confirmed the causality of AtRH18 and provided evidence for the involvement of the promoter region of AtRH18 in the hybrid chlorosis. Furthermore, AtMOM1 from the second parent was identified as the likely candidate gene on chromosome 1. Chlorotic hybrids displayed transgenerational decline in chlorosis, and DNA demethylation experiment restored chlorophyll levels in chlorotic hybrids. Quantification of rRNA indicated that hybrid chlorosis was associated with an imbalance in the ratio of cytosolic and plastid ribosomes. Our findings highlight that the epigenetic regulation of AtRH18 causes hybrid breakdown and provide novel information about the role of AtRH18 in plant development.
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Affiliation(s)
- Neha Vaid
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Hirofumi Ishihara
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Björn Plötner
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Katelyn Sageman-Furnas
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Andrew Wiszniewski
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Roosa A E Laitinen
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
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Rasheed A, Takumi S, Hassan MA, Imtiaz M, Ali M, Morgunov AI, Mahmood T, He Z. Appraisal of wheat genomics for gene discovery and breeding applications: a special emphasis on advances in Asia. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:1503-1520. [PMID: 31897516 DOI: 10.1007/s00122-019-03523-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/23/2019] [Indexed: 06/10/2023]
Abstract
We discussed the most recent efforts in wheat functional genomics to discover new genes and their deployment in breeding with special emphasis on advances in Asian countries. Wheat research community is making significant progress to bridge genotype-to-phenotype gap and then applying this knowledge in genetic improvement. The advances in genomics and phenomics have intrigued wheat researchers in Asia to make best use of this knowledge in gene and trait discovery. These advancements include, but not limited to, map-based gene cloning, translational genomics, gene mapping, association genetics, gene editing and genomic selection. We reviewed more than 57 homeologous genes discovered underpinning important traits and multiple strategies used for their discovery. Further, the complementary advancements in wheat phenomics and analytical approaches to understand the genetics of wheat adaptability, resilience to climate extremes and resistance to pest and diseases were discussed. The challenge to build a gold standard reference genome sequence of bread wheat is now achieved and several de novo reference sequences from the cultivars representing different gene pools will be available soon. New pan-genome sequencing resources of wheat will strengthen the foundation required for accelerated gene discovery and provide more opportunities to practice the knowledge-based breeding.
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Affiliation(s)
- Awais Rasheed
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China.
- International Maize and Wheat Improvement Center (CIMMYT), CAAS, 12 Zhongguancun South Street, Beijing, 100081, China.
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
| | - Shigeo Takumi
- Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada, Kobe, 657-8501, Japan
| | - Muhammad Adeel Hassan
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Muhammad Imtiaz
- International Maize and Wheat Improvement Center (CIMMYT) Pakistan office, c/o National Agriculture Research Center (NARC), Islamabad, Pakistan
| | - Mohsin Ali
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Alex I Morgunov
- International Maize and Wheat Improvement Center (CIMMYT), Yenimahalle, Ankara, 06170, Turkey
| | - Tariq Mahmood
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Zhonghu He
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
- International Maize and Wheat Improvement Center (CIMMYT), CAAS, 12 Zhongguancun South Street, Beijing, 100081, China
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5
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Kuki Y, Ohno R, Yoshida K, Takumi S. Heterologous expression of wheat WRKY transcription factor genes transcriptionally activated in hybrid necrosis strains alters abiotic and biotic stress tolerance in transgenic Arabidopsis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 150:71-79. [PMID: 32120271 DOI: 10.1016/j.plaphy.2020.02.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/22/2020] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Hybrid necrosis and hybrid chlorosis are sometimes observed in interspecific hybrids between the tetraploid wheat cultivar Langdon and diploid wild wheat Aegilops tauschii. Many WRKY transcription factor genes are dramatically upregulated in necrosis and chlorosis wheat hybrids. Here, we isolated cDNA clones for four wheat WRKY transcription factor genes, TaWRKY49, TaWRKY92, TaWRKY112, and TaWRKY142, that were commonly upregulated in the hybrid necrosis and hybrid chlorosis and belonged to the same clade of the WRKY gene family. Expression patterns of the four TaWRKY genes in response to several stress conditions were similar in wheat seeding leaves. The four TaWRKY-GFP fusion proteins were targeted to the nucleus in onion epidermal cells. The TaWRKY gene expression levels were increased by high salt, dehydration, darkness, and blast fungus treatment in common wheat. Expression of either of the TaWRKY genes increased salinity and osmotic stress tolerance accompanied with overexpression of STZ/Zat10, and induced overexpression of the salicylic acid-signal pathway marker gene AtPR1 in transgenic Arabidopsis. TaWRKY142 expression also induced the jasmonic acid-pathway marker gene AtPDF1.2 and enhanced resistance against the fungal pathogen Colletotrichum higginsianum in transgenic Arabidopsis. These results suggest that the four TaWRKY genes act as integrated hubs of multiple stress signaling pathways in wheat and play important roles in autoimmune response-inducing hybrid necrosis and hybrid chlorosis.
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Affiliation(s)
- Yasunobu Kuki
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe, Hyogo, Kobe, 657-8501, Japan
| | - Ryoko Ohno
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe, Hyogo, Kobe, 657-8501, Japan.
| | - Kentaro Yoshida
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe, Hyogo, Kobe, 657-8501, Japan
| | - Shigeo Takumi
- Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe, Hyogo, Kobe, 657-8501, Japan.
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6
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Kishii M. An Update of Recent Use of Aegilops Species in Wheat Breeding. FRONTIERS IN PLANT SCIENCE 2019; 10:585. [PMID: 31143197 PMCID: PMC6521781 DOI: 10.3389/fpls.2019.00585] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/18/2019] [Indexed: 05/16/2023]
Abstract
Aegilops species have significantly contributed to wheat breeding despite the difficulties involved in the handling of wild species, such as crossability and incompatibility. A number of biotic resistance genes have been identified and incorporated into wheat varieties from Aegilops species, and this genus is also contributing toward improvement of complex traits such as yield and abiotic tolerance for drought and heat. The D genome diploid species of Aegilops tauschii has been utilized most often in wheat breeding programs. Other Aegilops species are more difficult to utilize in the breeding because of lower meiotic recombination frequencies; generally they can be utilized only after extensive and time-consuming procedures in the form of translocation/introgression lines. After the emergence of Ug99 stem rust and wheat blast threats, Aegilops species gathered more attention as a form of new resistance sources. This article aims to update recent progress on Aegilops species, as well as to cover new topics around their use in wheat breeding.
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Affiliation(s)
- Masahiro Kishii
- Global Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), Texcoco, Mexico
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Yu X, Wang X, Hyldgaard B, Zhu Z, Zhou R, Kjaer KH, Ouzounis T, Lou Q, Li J, Cai Q, Rosenqvist E, Ottosen CO, Chen J. Allopolyploidization in Cucumis contributes to delayed leaf maturation with repression of redundant homoeologous genes. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 94:393-404. [PMID: 29421854 DOI: 10.1111/tpj.13865] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 01/30/2018] [Accepted: 02/01/2018] [Indexed: 05/25/2023]
Abstract
The important role of polyploidy in plant evolution is widely recognized. However, many questions remain to be explored to address how polyploidy affects the phenotype of the plant. To shed light on the phenotypic and molecular impacts of allopolyploidy, we investigated the leaf development of a synthesized allotetraploid (Cucumis × hytivus), with an emphasis on chlorophyll development. Delayed leaf maturation was identified in C. × hytivus, based on delayed leaf expansion, initial chlorophyll deficiency in the leaves and disordered sink-source transition. Anatomical observations also revealed disturbed chloroplast development in C. ×hytivus. The determination of chlorophyll biosynthesis intermediates suggested that the chlorophyll biosynthesis pathway of C. × hytivus is blocked at the site at which uroporphyrinogen III is catalysed to coproporphyrinogen III. Three chlorophyll biosynthesis-related genes, HEMA1, HEME2 and POR, were significantly repressed in C. × hytivus. Sequence alignment showed both synonymous and non-synonymous substitutions in the HEMA1, HEME2 and POR genes of the parents. Cloning of the chlorophyll biosynthetic genes suggested the retention of homoeologs. In addition, a chimeric clone of the HEMA1 gene that consisted of homologous genes from the parents was identified in C. × hytivus. Overall, our results showed that allopolyploidization in Cucumis has resulted in disturbed chloroplast development and reduced chlorophyll biosynthesis caused by the repressed expression of duplicated homologous genes, which further led to delayed leaf maturation in the allotetraploid, C. × hytivus. The preferential retention/loss of certain types of genes and non-reciprocal homoeologous recombination were also supported in the present study, which provides new insights into the impact of allopolyploidy.
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Affiliation(s)
- Xiaqing Yu
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- State Key Lab for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xixi Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- State Key Lab for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
| | | | - Zaobing Zhu
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- State Key Lab for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
| | - Rong Zhou
- Vegetable Research Institute, Jiangsu Academy of Agricultural Science, Jiangsu, Nanjing, China
| | | | - Theoharis Ouzounis
- Horticulture and Product Physiology Group, Wageningen University, Wageningen, The Netherlands
| | - Qunfeng Lou
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- State Key Lab for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
| | - Ji Li
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- State Key Lab for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
| | - Qingsheng Cai
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Eva Rosenqvist
- Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Jinfeng Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- State Key Lab for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
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Plötner B, Nurmi M, Fischer A, Watanabe M, Schneeberger K, Holm S, Vaid N, Schöttler MA, Walther D, Hoefgen R, Weigel D, Laitinen RAE. Chlorosis caused by two recessively interacting genes reveals a role of RNA helicase in hybrid breakdown in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 91:251-262. [PMID: 28378460 DOI: 10.1111/tpj.13560] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/24/2017] [Accepted: 03/30/2017] [Indexed: 05/28/2023]
Abstract
Hybrids often differ in fitness from their parents. They may be superior, translating into hybrid vigour or heterosis, but they may also be markedly inferior, because of hybrid weakness or incompatibility. The underlying genetic causes for the latter can often be traced back to genes that evolve rapidly because of sexual or host-pathogen conflicts. Hybrid weakness may manifest itself only in later generations, in a phenomenon called hybrid breakdown. We have characterized a case of hybrid breakdown among two Arabidopsis thaliana accessions, Shahdara (Sha, Tajikistan) and Lövvik-5 (Lov-5, Northern Sweden). In addition to chlorosis, a fraction of the F2 plants have defects in leaf and embryo development, and reduced photosynthetic efficiency. Hybrid chlorosis is due to two major-effect loci, of which one, originating from Lov-5, appears to encode an RNA helicase (AtRH18). To examine the role of the chlorosis allele in the Lövvik area, in addition to eight accessions collected in 2009, we collected another 240 accessions from 15 collections sites, including Lövvik, from Northern Sweden in 2015. Genotyping revealed that Lövvik collection site is separated from the rest. Crosses between 109 accessions from this area and Sha revealed 85 cases of hybrid chlorosis, indicating that the chlorosis-causing allele is common in this area. These results suggest that hybrid breakdown alleles not only occur at rapidly evolving loci, but also at genes that code for conserved processes.
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Affiliation(s)
- Björn Plötner
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Markus Nurmi
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Axel Fischer
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Mutsumi Watanabe
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | | | | | - Neha Vaid
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | | | - Dirk Walther
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Rainer Hoefgen
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Detlef Weigel
- Max Planck Institute for Developmental Biology, Tübingen, Germany
| | - Roosa A E Laitinen
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
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9
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Nishijima R, Okamoto Y, Hatano H, Takumi S. Quantitative trait locus analysis for spikelet shape-related traits in wild wheat progenitor Aegilops tauschii: Implications for intraspecific diversification and subspecies differentiation. PLoS One 2017; 12:e0173210. [PMID: 28264068 PMCID: PMC5338802 DOI: 10.1371/journal.pone.0173210] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/16/2017] [Indexed: 11/19/2022] Open
Abstract
Wild diploid wheat Aegilops tauschii, the D-genome progenitor of common wheat, carries large genetic variation in spikelet and grain morphology. Two differentiated subspecies of Ae. tauschii, subspecies tauschii and strangulata, have been traditionally defined based on differences in spikelet morphology. Here, we first assessed six spikelet shape-related traits among 199 Ae. tauschii accessions, and found that the accessions belonging to TauL1major lineage produced significantly longer spikes, higher spikelet density, and shorter, narrower spikelets than another major lineage, TauL2, in which the strangulata accessions are included. Next, we performed quantitative trait locus (QTL) analysis of the spikelet and grain shape using three mapping populations derived from interlineage crosses between TauL1 and TauL2 to identify the genetic loci for the morphological variations of the spikelet and grain shape in Ae. tauschii. Three major QTL regions for the examined traits were detected on chromosomes 3D, 4D and 7D. The 3D and 4D QTL regions for several spikelet shape-related traits were conserved in the three mapping populations, which indicated that the 3D and 4D QTLs contribute to divergence of the two major lineages. The 7D QTLs were found only in a mapping population from a cross of the two subspecies, suggesting that these 7D QTLs may be closely related to subspecies differentiation in Ae. tauschii. Thus, QTL analysis for spikelet and grain morphology may provide useful information to elucidate the evolutionary processes of intraspecific differentiation.
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Affiliation(s)
- Ryo Nishijima
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University, Nada, Kobe, Japan
| | - Yuki Okamoto
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University, Nada, Kobe, Japan
| | - Hitoshi Hatano
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University, Nada, Kobe, Japan
| | - Shigeo Takumi
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University, Nada, Kobe, Japan
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10
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Sakaguchi K, Nishijima R, Iehisa JCM, Takumi S. Fine mapping and genetic association analysis of Net2, the causative D-genome locus of low temperature-induced hybrid necrosis in interspecific crosses between tetraploid wheat and Aegilops tauschii. Genetica 2016; 144:523-533. [PMID: 27502693 DOI: 10.1007/s10709-016-9920-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 08/02/2016] [Indexed: 12/20/2022]
Abstract
Hybrid necrosis has been observed in many interspecific hybrids from crosses between tetraploid wheat and the wheat D-genome donor Aegilops tauschii. Type II necrosis is a kind of hybrid incompatibility that is specifically characterized by low-temperature induction and growth suppression. Two complementary genes, Net1 on the AB genome and Net2 on the D genome, putatively control type II necrosis in ABD triploids and synthetic hexaploid wheat. Toward map-based cloning of Net2, a fine map around the Net2 region on 2DS was constructed in this study. Using the draft genome sequence of Ae. tauschii and the physical map of the barley genome, the Net2 locus was mapped within a 0.6 cM interval between two closely linked markers. Although local chromosomal rearrangements were observed in the Net2-corresponding region between the barley/Brachypodium and Ae. tauschii genomes, the two closely linked markers were significantly associated with type II necrosis in Ae. tauschii. These results suggest that these markers will aid efficient selection of Net2 non-carrier individuals from the Ae. tauschii population and intraspecific progeny, and could help with introgression of agriculturally important genes from Ae. tauschii to common wheat.
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Affiliation(s)
- Kouhei Sakaguchi
- Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada-ku, Kobe, 657-8501, Japan
| | - Ryo Nishijima
- Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada-ku, Kobe, 657-8501, Japan
| | - Julio Cesar Masaru Iehisa
- Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada-ku, Kobe, 657-8501, Japan
| | - Shigeo Takumi
- Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada-ku, Kobe, 657-8501, Japan.
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Chen C, E Z, Lin HX. Evolution and Molecular Control of Hybrid Incompatibility in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:1208. [PMID: 27563306 PMCID: PMC4980391 DOI: 10.3389/fpls.2016.01208] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/29/2016] [Indexed: 05/09/2023]
Abstract
Postzygotic reproductive isolation (RI) plays an important role in speciation. According to the stage at which it functions and the symptoms it displays, postzygotic RI can be called hybrid inviability, hybrid weakness or necrosis, hybrid sterility, or hybrid breakdown. In this review, we summarized new findings about hybrid incompatibilities in plants, most of which are from studies on Arabidopsis and rice. Recent progress suggests that hybrid incompatibility is a by-product of co-evolution either with "parasitic" selfish elements in the genome or with invasive microbes in the natural environment. We discuss the environmental influences on the expression of hybrid incompatibility and the possible effects of environment-dependent hybrid incompatibility on sympatric speciation. We also discuss the role of domestication on the evolution of hybrid incompatibilities.
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Affiliation(s)
- Chen Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou UniversityYangzhou, China
- *Correspondence: Chen Chen,
| | - Zhiguo E
- China National Rice Research InstituteHangzhou, China
| | - Hong-Xuan Lin
- National Key Laboratory of Plant Molecular Genetics and CAS Centre for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghai, China
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Takamatsu K, Iehisa JCM, Nishijima R, Takumi S. Comparison of gene expression profiles and responses to zinc chloride among inter- and intraspecific hybrids with growth abnormalities in wheat and its relatives. PLANT MOLECULAR BIOLOGY 2015; 88:487-502. [PMID: 26081164 DOI: 10.1007/s11103-015-0338-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 06/09/2015] [Indexed: 06/04/2023]
Abstract
Hybrid necrosis is a well-known reproductive isolation mechanism in plant species, and an autoimmune response is generally considered to trigger hybrid necrosis through epistatic interaction between disease resistance-related genes in hybrids. In common wheat, the complementary Ne1 and Ne2 genes control hybrid necrosis, defined as type I necrosis. Two other types of hybrid necrosis (type II and type III) have been observed in interspecific hybrids between tetraploid wheat and Aegilops tauschii. Another type of hybrid necrosis, defined here as type IV necrosis, has been reported in F1 hybrids between Triticum urartu and some accessions of Triticum monococcum ssp. aegilopoides. In types I, III and IV, cell death occurs gradually starting in older tissues, whereas type II necrosis symptoms occur only under low temperature. To compare comprehensive gene expression patterns of hybrids showing growth abnormalities, transcriptome analysis of type I and type IV necrosis was performed using a wheat 38k oligo-DNA microarray. Defense-related genes including many WRKY transcription factor genes were dramatically up-regulated in plants showing type I and type IV necrosis, similarly to other known hybrid abnormalities, suggesting an association with an autoimmune response. Reactive oxygen species generation and necrotic cell death were effectively inhibited by ZnCl2 treatment in types I, III and IV necrosis, suggesting a significant association of Ca(2+) influx in upstream signaling of necrotic cell death in wheat hybrid necrosis.
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Affiliation(s)
- Kiyofumi Takamatsu
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University, Rokkodai 1-1, Nada, Kobe, 657-8501, Japan
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Hirao K, Nishijima R, Sakaguchi K, Takumi S. Fine mapping of Hch1, the causal D-genome gene for hybrid chlorosis in interspecific crosses between tetraploid wheat and Aegilops tauschii. Genes Genet Syst 2015; 90:283-91. [DOI: 10.1266/ggs.15-00035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Kana Hirao
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University
| | - Ryo Nishijima
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University
| | - Kohei Sakaguchi
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University
| | - Shigeo Takumi
- Laboratory of Plant Genetics, Graduate School of Agricultural Science, Kobe University
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