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Wang Y, Xia J, Huang L, Lin Q, Cai Q, Xie H, He W, Wei Y, Xie H, Tang W, Wu W, Zhang J. Transcriptome Analyses Indicate Significant Association of Increased Non-Additive and Allele-Specific Gene Expression with Hybrid Weakness in Rice ( Oryza sativa L.). LIFE (BASEL, SWITZERLAND) 2022; 12:life12081278. [PMID: 36013457 PMCID: PMC9410013 DOI: 10.3390/life12081278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/09/2022] [Accepted: 08/16/2022] [Indexed: 11/30/2022]
Abstract
The heterosis in hybrid rice is highly affected by the environment and hybrid weakness occurs frequently depending on the genotypes of the hybrid and its parents. Hybrid weakness was also observed in our field experiments on nine rice hybrids produced by 3 × 3 incomplete diallel crosses. Among the nine hybrids, five displayed mid-parent heterosis (MPH) for grain yield per plant, while four showed mid-parent hybrid weakness (MPHW). A sequencing analysis of transcriptomes in panicles at the seed-filling stage revealed a significant association between enhanced non-additive gene expression (NAE) and allele-specific gene expression (ASE) with hybrid weakness. High proportions of ASE genes, with most being of mono-allele expression, were detected in the four MPHW hybrids, ranging from 22.65% to 45.97%; whereas only 4.80% to 5.69% of ASE genes were found in the five MPH hybrids. Moreover, an independence test indicated that the enhancements of NAE and ASE in the MPHW hybrids were significantly correlated. Based on the results of our study, we speculated that an unfavorable environment might cause hybrid weakness by enhancing ASE and NAE at the transcriptome level.
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Affiliation(s)
- Yingheng Wang
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Jing Xia
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Likun Huang
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qiang Lin
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Qiuhua Cai
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Hongguang Xie
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Wei He
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Yidong Wei
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Huaan Xie
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Weiqi Tang
- Marine and Agricultural Biotechnology Laboratory, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China
- Correspondence: (W.T.); (W.W.); (J.Z.)
| | - Weiren Wu
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Correspondence: (W.T.); (W.W.); (J.Z.)
| | - Jianfu Zhang
- Rice Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350019, China
- National Rice Engineering Research Center of China, Fuzhou 350003, China
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fuzhou 350003, China
- Incubator of National Key Laboratory of Fujian Germplasm Innovation and Molecular Breeding between Fujian and Ministry of Science and Technology of China, Fuzhou 350003, China
- Base of South China, State Key Laboratory of Hybrid Rice, Fuzhou 350003, China
- Key Laboratory of Germplasm Innovation and Molecular Breeding of Hybrid Rice for South China, Ministry of Agriculture and Rural Affairs of China, Fuzhou 350003, China
- Fuzhou Branch, National Rice Improvement Center of China, Fuzhou 350003, China
- Fujian Engineering Laboratory of Crop Molecular Breeding, Fuzhou 350003, China
- Fujian Key Laboratory of Rice Molecular Breeding, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
- Correspondence: (W.T.); (W.W.); (J.Z.)
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Than Kutay Soe, Kunieda M, Sunohara H, Inukai Y, Reyes VP, Nishiuchi S, Doi K. A Novel Combination of Genes Causing Temperature-Sensitive Hybrid Weakness in Rice. FRONTIERS IN PLANT SCIENCE 2022; 13:908000. [PMID: 35837460 PMCID: PMC9274174 DOI: 10.3389/fpls.2022.908000] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/26/2022] [Indexed: 09/29/2023]
Abstract
Reproductive isolation is an obstacle for plant breeding when a distant cross is demanded. It can be divided into two main types based on different growth stages: prezygotic isolation and postzygotic isolation. The hybrid weakness, which is a type of postzygotic isolation, can become a problem in crop breeding. In order to overcome reproductive isolation, it is necessary to elucidate its mechanism. In this study, genetic analysis for low temperature-dependent hybrid weakness was conducted in a rice F2 population derived from Taichung 65 (T65, Japonica) and Lijiangxintuanheigu (LTH, Japonica). The weak and severe weak plants in F2 showed shorter culm length, late heading, reduced panicle number, decreased grain numbers per panicle, and impaired root development in the field. Our result also showed that hybrid weakness was affected by temperature. It was observed that 24°C enhanced hybrid weakness, whereas 34°C showed recovery from hybrid weakness. In terms of the morphology of embryos, no difference was observed. Therefore, hybrid weakness affects postembryonic development and is independent of embryogenesis. The genotypes of 126 F2 plants were determined through genotyping-by-sequencing and a linkage map consisting of 862 single nucleotide polymorphism markers was obtained. Two major quantitative trait loci (QTLs) were detected on chromosomes 1 [hybrid weakness j 1 (hwj1)] and 11 [hybrid weakness j 2 (hwj2)]. Further genotyping indicated that the hybrid weakness was due to an incompatible interaction between the T65 allele of hwj1 and the LTH allele of hwj2. A large F2 populations consisting of 5,722 plants were used for fine mapping of hwj1 and hwj2. The two loci, hwj1 and hwj2, were mapped in regions of 65-kb on chromosome 1 and 145-kb on chromosome 11, respectively. For hwj1, the 65-kb region contained 11 predicted genes, while in the hwj2 region, 22 predicted genes were identified, two of which are disease resistance-related genes. The identified genes along these regions serve as preliminary information on the molecular networks associated with hybrid weakness in rice.
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Affiliation(s)
- Than Kutay Soe
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Department of Botany, University of Yangon, Yangon, Myanmar
| | - Mai Kunieda
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Hidehiko Sunohara
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- Environmental Control Center Co., Ltd., Hachioji, Japan
| | - Yoshiaki Inukai
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya, Japan
| | - Vincent Pamugas Reyes
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Shunsaku Nishiuchi
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Kazuyuki Doi
- Laboratory of Information Sciences in Agricultural Lands, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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Yoneya Y, Wakabayashi T, Kato K. The temperature sensitive hybrid breakdown 1 induces low temperature-dependent intrasubspecific hybrid breakdown in rice. BREEDING SCIENCE 2021; 71:268-276. [PMID: 34377075 PMCID: PMC8329891 DOI: 10.1270/jsbbs.20129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/07/2021] [Indexed: 06/13/2023]
Abstract
Hybrid breakdown (HB) is an important type of post-zygotic reproductive barrier that inhibits hybrid production during the process of cross-breeding. A novel low temperature-dependent HB was identified in a chromosomal segment substitution line (CSSL) library derived from a cross of two rice (Oryza sativa L. japonica) cultivars, Yukihikari and Kirara397. A set of weakness symptoms in a target CSSL was observed at 23°C, but was rescued at 27°C and/or 30°C. Genetic analysis of HB using an F2:3 population of a cross between a target CSSL and Kirara397 found that a recessive temperature sensitive hybrid breakdown1 (thb1) gene from Yukihikari caused HB in the genetic background of Kirara397. Molecular mapping showed that thb1 was located within a 199-kb fragment on chromosome 6. A genetic study of F2 populations of reciprocal crosses between Yukihikari and Kirara397 confirmed that this HB was induced by the interaction of two recessive genes. These results provide important clues to further dissect the mechanism of generation of a novel temperature sensitive HB in rice intrasubspecific crosses and suggest that these linked markers will useful in rice breeding.
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Affiliation(s)
- Yuuki Yoneya
- Department of Agro-Environmental Science, Obihiro University of Agriculture
and Veterinary Medicine, Nishi 2-11 Inada, Obihiro, Hokkaido
080-8555, Japan
| | - Tae Wakabayashi
- Department of Agro-Environmental Science, Obihiro University of Agriculture
and Veterinary Medicine, Nishi 2-11 Inada, Obihiro, Hokkaido
080-8555, Japan
| | - Kiyoaki Kato
- Department of Agro-Environmental Science, Obihiro University of Agriculture
and Veterinary Medicine, Nishi 2-11 Inada, Obihiro, Hokkaido
080-8555, Japan
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Calvo-Baltanás V, Wang J, Chae E. Hybrid Incompatibility of the Plant Immune System: An Opposite Force to Heterosis Equilibrating Hybrid Performances. FRONTIERS IN PLANT SCIENCE 2021; 11:576796. [PMID: 33717206 PMCID: PMC7953517 DOI: 10.3389/fpls.2020.576796] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
Hybridization is a core element in modern rice breeding as beneficial combinations of two parental genomes often result in the expression of heterosis. On the contrary, genetic incompatibility between parents can manifest as hybrid necrosis, which leads to tissue necrosis accompanied by compromised growth and/or reduced reproductive success. Genetic and molecular studies of hybrid necrosis in numerous plant species revealed that such self-destructing symptoms in most cases are attributed to autoimmunity: plant immune responses are inadvertently activated in the absence of pathogenic invasion. Autoimmunity in hybrids predominantly occurs due to a conflict involving a member of the major plant immune receptor family, the nucleotide-binding domain and leucine-rich repeat containing protein (NLR; formerly known as NBS-LRR). NLR genes are associated with disease resistance traits, and recent population datasets reveal tremendous diversity in this class of immune receptors. Cases of hybrid necrosis involving highly polymorphic NLRs as major causes suggest that diversified R gene repertoires found in different lineages would require a compatible immune match for hybridization, which is a prerequisite to ensure increased fitness in the resulting hybrids. In this review, we overview recent genetic and molecular findings on hybrid necrosis in multiple plant species to provide an insight on how the trade-off between growth and immunity is equilibrated to affect hybrid performances. We also revisit the cases of hybrid weakness in which immune system components are found or implicated to play a causative role. Based on our understanding on the trade-off, we propose that the immune system incompatibility in plants might play an opposite force to restrict the expression of heterosis in hybrids. The antagonism is illustrated under the plant fitness equilibrium, in which the two extremes lead to either hybrid necrosis or heterosis. Practical proposition from the equilibrium model is that breeding efforts for combining enhanced disease resistance and high yield shall be achieved by balancing the two forces. Reverse breeding toward utilizing genomic data centered on immune components is proposed as a strategy to generate elite hybrids with balanced immunity and growth.
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Shiragaki K, Nakamura R, Nomura S, He H, Yamada T, Marubashi W, Oda M, Tezuka T. Phenylalanine ammonia-lyase and phenolic compounds are related to hybrid lethality in the cross Nicotiana suaveolens× N. tabacum. PLANT BIOTECHNOLOGY (TOKYO, JAPAN) 2020; 37:327-333. [PMID: 33088196 PMCID: PMC7557668 DOI: 10.5511/plantbiotechnology.20.0606a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
Hybrid lethality observed in hybrid seedlings between Nicotiana suaveolens and N. tabacum is characterized by browning, initially of the hypocotyls and eventually of entire seedlings. We investigated the mechanism underlying this browning of tissues. A phenylalanine ammonia-lyase (PAL) gene codes an enzyme involved in a pathway producing phenolic compounds related to the browning of plant tissues. The expression of PAL rapidly increased with the induction of hybrid lethality. Phenolic compounds were observed to be accumulated in whole parts of hybrid seedlings. Treatment of hybrid seedlings with L-2-aminooxy-3-phenylpropionic acid (AOPP), an inhibitor for PAL, suppressed browning and decreased the phenolic content of hybrid seedlings. Although programmed cell death (PCD) was involved in hybrid lethality, AOPP treatment also suppressed cell death and enhanced the growth of hybrid seedlings. These results indicated that PAL is involved in hybrid lethality, and phenolic compounds could be the cause of hybrid lethality-associated tissue browning.
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Affiliation(s)
- Kumpei Shiragaki
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Rie Nakamura
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Shigeki Nomura
- Graduate School of Agriculture, Meiji University, Kawasaki, Kanagawa 214-8571, Japan
| | - Hai He
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Tetsuya Yamada
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8538, Japan
| | - Wataru Marubashi
- Graduate School of Agriculture, Meiji University, Kawasaki, Kanagawa 214-8571, Japan
| | - Masayuki Oda
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Education and Research Field, College of Life, Environment, and Advanced Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahiro Tezuka
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Education and Research Field, College of Life, Environment, and Advanced Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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Shiragaki K, Yokoi S, Tezuka T. A hypersensitive response-like reaction is involved in hybrid weakness in F 1 plants of the cross Capsicum annuum × Capsicum chinense. BREEDING SCIENCE 2020; 70:430-437. [PMID: 32968345 PMCID: PMC7495199 DOI: 10.1270/jsbbs.19137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Hybrid weakness in Capsicum is characterized by the termination of leaf differentiation after the development of several leaves. F1 plants in some crosses between Capsicum annuum and Capsicum chinense show weakness; this phenomenon has not been investigated in detail since first reported. In the present study, we characterized morphologically and physiologically hybrid weakness in Capsicum. F1 plants did not show weaker growth than their parents 20 days after germination (DAG), but at 40 DAG, the hybrid weakness phenotype was evidenced by almost complete arrest of new leaf formation, delayed increase in plant height, and reduced upper internode length. The shoot apical meristem (SAM) of F1 plants exhibited delayed development and an abnormal structure characterized by a flat shape and the presence of fuzzy cell layers on the surface. These abnormal SAMs of F1 plants may lead to dwarfism. Dead cells and accumulation of H2O2 were visually detected in leaves of F1 plants, and cell death was considered to be programmed, as it was accompanied by internucleosomal fragmentation of DNA. The expression of immunity marker genes PR1 and PR2 was upregulated in leaves of F1 plants. These results suggest that a hypersensitive response-like reaction is involved in Capsicum hybrid weakness.
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Affiliation(s)
- Kumpei Shiragaki
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Shuji Yokoi
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Education and Research Field, College of Life, Environment, and Advanced Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Bioeconomy Research Institute, Research Center for the 21st Century, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahiro Tezuka
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Education and Research Field, College of Life, Environment, and Advanced Sciences, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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HWA1- and HWA2-Mediated Hybrid Weakness in Rice Involves Cell Death, Reactive Oxygen Species Accumulation, and Disease Resistance-Related Gene Upregulation. PLANTS 2019; 8:plants8110450. [PMID: 31731501 PMCID: PMC6918435 DOI: 10.3390/plants8110450] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/10/2019] [Accepted: 10/24/2019] [Indexed: 11/17/2022]
Abstract
Hybrid weakness is a type of reproductive isolation in which F1 hybrids of normal parents exhibit weaker growth characteristics than their parents. F1 hybrid of the Oryza sativa Indian cultivars ‘P.T.B.7′ and ‘A.D.T.14′ exhibits hybrid weakness that is associated with the HWA1 and HWA2 loci. Accordingly, the aim of the present study was to analyze the hybrid weakness phenotype of the ‘P.T.B.7′ × ‘A.D.T.14′ hybrids. The height and tiller number of the F1 hybrid were lower than those of either parent, and F1 hybrid also exhibited leaf yellowing that was not observed in either parent. In addition, the present study demonstrates that SPAD values, an index correlated with chlorophyll content, are effective for evaluating the progression of hybrid weakness that is associated with the HWA1 and HWA2 loci because it accurately reflects degree of leaf yellowing. Both cell death and H2O2, a reactive oxygen species, were detected in the yellowing leaves of the F1 hybrid. Furthermore, disease resistance-related genes were upregulated in the yellowing leaves of the F1 hybrids, whereas photosynthesis-related genes tended to be downregulated. These results suggest that the hybrid weakness associated with the HWA1 and HWA2 loci involves hypersensitive response-like mechanisms.
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Smukowski Heil CS, Large CRL, Patterson K, Hickey ASM, Yeh CLC, Dunham MJ. Temperature preference can bias parental genome retention during hybrid evolution. PLoS Genet 2019; 15:e1008383. [PMID: 31525194 PMCID: PMC6762194 DOI: 10.1371/journal.pgen.1008383] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 09/26/2019] [Accepted: 08/22/2019] [Indexed: 11/18/2022] Open
Abstract
Interspecific hybridization can introduce genetic variation that aids in adaptation to new or changing environments. Here, we investigate how hybrid adaptation to temperature and nutrient limitation may alter parental genome representation over time. We evolved Saccharomyces cerevisiae x Saccharomyces uvarum hybrids in nutrient-limited continuous culture at 15°C for 200 generations. In comparison to previous evolution experiments at 30°C, we identified a number of responses only observed in the colder temperature regime, including the loss of the S. cerevisiae allele in favor of the cryotolerant S. uvarum allele for several portions of the hybrid genome. In particular, we discovered a genotype by environment interaction in the form of a loss of heterozygosity event on chromosome XIII; which species' haplotype is lost or maintained is dependent on the parental species' temperature preference and the temperature at which the hybrid was evolved. We show that a large contribution to this directionality is due to a temperature dependent fitness benefit at a single locus, the high affinity phosphate transporter gene PHO84. This work helps shape our understanding of what forces impact genome evolution after hybridization, and how environmental conditions may promote or disfavor the persistence of hybrids over time.
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Affiliation(s)
- Caiti S. Smukowski Heil
- Genome Sciences Department, University of Washington, Seattle, Washington, United States of America
| | - Christopher R. L. Large
- Genome Sciences Department, University of Washington, Seattle, Washington, United States of America
| | - Kira Patterson
- Genome Sciences Department, University of Washington, Seattle, Washington, United States of America
| | - Angela Shang-Mei Hickey
- Genome Sciences Department, University of Washington, Seattle, Washington, United States of America
| | - Chiann-Ling C. Yeh
- Genome Sciences Department, University of Washington, Seattle, Washington, United States of America
| | - Maitreya J. Dunham
- Genome Sciences Department, University of Washington, Seattle, Washington, United States of America
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Jiang Q, Zeng Y, Yu B, Cen W, Lu S, Jia P, Wang X, Qin B, Cai Z, Luo J. The rice pds1 locus genetically interacts with partner to cause panicle exsertion defects and ectopic tillers in spikelets. BMC PLANT BIOLOGY 2019; 19:200. [PMID: 31092192 PMCID: PMC6521401 DOI: 10.1186/s12870-019-1805-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 04/26/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Rice (Oryza sativa L.) is a staple food crop worldwide. Its yield and quality are affected by its tillering pattern and spikelet development. Although many genes involved in the vegetative and reproductive development of rice have been characterized in previous studies, the genetic mechanisms that control axillary tillering, spikelet development, and panicle exsertion remain incompletely understood. RESULTS Here, we characterized a novel rice recombinant inbred line (RIL), panicle exsertion defect and aberrant spikelet (pds). It was derived from a cross between two indica varieties, S142 and 430. Intriguingly, no abnormal phenotypes were observed in the parents of pds. This RIL exhibited sheathed panicles at heading stage. Still, a small number of tillers in pds plants were fully exserted from the flag leaves. Elongated sterile lemmas and rudimentary glumes (occurred occasionally) were observed in the spikelets of the exserted panicles and were transformed into palea/lemma-like structures. Furthermore, more interestingly, tillers occasionally grew from the axils of the elongated rudimentary glumes. Via genetic linkage analysis, we found that the abnormal phenotype of pds manifesting as genetic incompatibility or hybrid weakness was caused by genetic interaction between a recessive locus, pds1, which was derived from S142 and mapped to chromosome 8, and a locus pds2, which not yet mapped from 430. We fine-mapped pds1 to an approximately 55-kb interval delimited by the markers pds-4 and 8 M3.51. Six RGAP-annotated ORFs were included in this genomic region. qPCR analysis revealed that Loc_Os080595 might be the target of pds1 locus, and G1 gene might be involved in the genetic mechanism underlying the pds phenotype. CONCLUSIONS In this study, histological and genetic analyses revealed that the pyramided pds loci resulted in genetic incompatibility or hybrid weakness in rice might be caused by a genetic interaction between pds loci derived from different rice varieties. Further isolation of pds1 and its interactor pds2, would provide new insight into the molecular regulation of grass inflorescence development and exsertion, and the evolution history of the extant rice.
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Affiliation(s)
- Qigui Jiang
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
| | - Yindi Zeng
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
| | - Baiyang Yu
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
| | - Weijian Cen
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
- Agriculture College, Guangxi University, Nanning, 530004 China
| | - Siyuan Lu
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
| | - Peilong Jia
- Agriculture College, Guangxi University, Nanning, 530004 China
| | - Xuan Wang
- Agriculture College, Guangxi University, Nanning, 530004 China
| | - Baoxiang Qin
- Agriculture College, Guangxi University, Nanning, 530004 China
| | - Zhongquan Cai
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
- Institute of New Rural Development, Guangxi University, Nanning, 530004 China
- Agriculture College, Guangxi University, Nanning, 530004 China
| | - Jijing Luo
- College of Life Science and technology (State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources), Guangxi University, Nanning, 530004 China
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10
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Nadir S, Li W, Zhu Q, Khan S, Zhang XL, Zhang H, Wei ZF, Li MT, Zhou L, Li CY, Chen LJ, Lee DS. A novel discovery of a long terminal repeat retrotransposon-induced hybrid weakness in rice. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:1197-1207. [PMID: 30576523 PMCID: PMC6382335 DOI: 10.1093/jxb/ery442] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/04/2018] [Indexed: 06/09/2023]
Abstract
Hybrid weakness is a post-zygotic hybridization barrier frequently observed in plants, including rice. In this study, we describe the genomic variation among three temperate japonica rice (Oryza sativa ssp. japonica) varieties 'Aranghyangchalbyeo' ('CH7'), 'Sanghaehyangheolua' ('CH8') and 'Shinseonchalbyeo' ('CH9'), carrying different hybrid weakness genes. The reciprocal progeny obtained from crossing any two varieties displayed characteristic hybrid weakness traits. We mapped and cloned a new locus, Hwc3 (hybrid weakness 3), on chromosome 4. Sequence analysis identified that a long terminal repeat (LTR) retrotransposon was inserted into the promoter region of the Hwc3 gene in 'CH7'. A 4-kb DNA fragment from 'CH7' containing the Hwc3 gene with the inserted LTR retrotransposon was able to induce hybrid weakness in hybrids with 'CH8' plants carrying the Hwc1 gene by genetic complementation. We investigated the differential gene expression profile of F1 plants exhibiting hybrid weakness and detected that the genes associated with energy metabolism were significantly down-regulated compared with the parents. Based on our results, we propose that LTR retrotransposons could be a potential cause of hybrid weakness in intrasubspecific hybrids in japonica rice. Understanding the molecular mechanisms underlying intrasubspecific hybrid weakness is important for increasing our knowledge on reproductive isolation and could have significant implications for rice improvement and hybrid breeding.
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Affiliation(s)
- Sadia Nadir
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- Department of Chemistry, University of Science and Technology, Bannu, KPK, Pakistan
- Centre for Mountain Ecosystem Studies, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Wei Li
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Qian Zhu
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Sehroon Khan
- Centre for Mountain Ecosystem Studies, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China
- World Agroforestry Centre, East and Central Asia, Kunming, Yunnan, China
| | - Xiao-Ling Zhang
- Agricultural College of Kunming University, Kunming, Yunnan, China
| | - Hui Zhang
- College of Agronomy and Biotechnology, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Zhen-Fei Wei
- Maize Research Institute, Shanxi Academy of Agriculture Sciences, Xinzhou, Shanxi, China
| | - Meng-Ting Li
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Li Zhou
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Cheng-Yun Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Li-Juan Chen
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Dong-Sun Lee
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
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11
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Nadir S, Khan S, Zhu Q, Henry D, Wei L, Lee DS, Chen L. An overview on reproductive isolation in Oryza sativa complex. AOB PLANTS 2018; 10:ply060. [PMID: 30538811 PMCID: PMC6280023 DOI: 10.1093/aobpla/ply060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 11/21/2018] [Indexed: 05/27/2023]
Abstract
Reproductive isolation is generally regarded as the essence of the speciation process. Studying closely related species is convenient for understanding the genetic basis of reproductive isolation. Therefore, the present review is restricted to the species and subspecies of the Oryza sativa complex, which includes the two domestic rice cultivars and six wild species. Although closely related, these rice species are separated from each other by a range reproductive barriers. This review presents a comprehensive understanding of the forces that shaped the formation of reproductive barriers among and between the species of the O. sativa complex. We suggest the possibility that domestication and artificial breeding in these rice species can lead to the early stages of speciation. Understanding the evolutionary and molecular mechanisms underlying reproductive isolation in rice will increase our knowledge in speciation and would also offer practical significance for the implementation of crop improvement strategies.
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Affiliation(s)
- Sadia Nadir
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- Department of Chemistry, University of Science and Technology, Bannu, Khyber Pakhtunkhwa, Pakistan
- Centre for Mountain Ecosystem Studies, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Sehroon Khan
- Centre for Mountain Ecosystem Studies, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Qian Zhu
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Doku Henry
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- Biotechnology Lab Complex, CSIR-Crops Research Institute, Ghana
| | - Li Wei
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
| | - Dong Sun Lee
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - LiJuan Chen
- Rice Research Institute, Yunnan Agriculture University, Kunming, Yunnan, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
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12
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Karasov TL, Chae E, Herman JJ, Bergelson J. Mechanisms to Mitigate the Trade-Off between Growth and Defense. THE PLANT CELL 2017; 29:666-680. [PMID: 28320784 PMCID: PMC5435432 DOI: 10.1105/tpc.16.00931] [Citation(s) in RCA: 255] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/23/2017] [Accepted: 03/16/2017] [Indexed: 05/03/2023]
Abstract
Plants have evolved an array of defenses against pathogens. However, mounting a defense response frequently comes with the cost of a reduction in growth and reproduction, carrying critical implications for natural and agricultural populations. This review focuses on how costs are generated and whether and how they can be mitigated. Most well-characterized growth-defense trade-offs stem from antagonistic crosstalk among hormones rather than an identified metabolic expenditure. A primary way plants mitigate such costs is through restricted expression of resistance; this can be achieved through inducible expression of defense genes or by the concentration of defense to particular times or tissues. Defense pathways can be primed for more effective induction, and primed states can be transmitted to offspring. We examine the resistance (R) genes as a case study of how the toll of defense can be generated and ameliorated. The fine-scale regulation of R genes is critical to alleviate the burden of their expression, and the genomic organization of R genes into coregulatory modules reduces costs. Plants can also recruit protection from other species. Exciting new evidence indicates that a plant's genotype influences the microbiome composition, lending credence to the hypothesis that plants shape their microbiome to enhance defense.
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Affiliation(s)
- Talia L Karasov
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Tübingen 72076, Germany
| | - Eunyoung Chae
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Tübingen 72076, Germany
| | - Jacob J Herman
- Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637
| | - Joy Bergelson
- Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637
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13
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Fu CY, Liu WG, Liu DL, Li JH, Zhu MS, Liao YL, Liu ZR, Zeng XQ, Wang F. Genome-wide DNA polymorphism in the indica rice varieties RGD-7S and Taifeng B as revealed by whole genome re-sequencing. Genome 2016; 59:197-207. [PMID: 26926666 DOI: 10.1139/gen-2015-0101] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Next-generation sequencing technologies provide opportunities to further understand genetic variation, even within closely related cultivars. We performed whole genome resequencing of two elite indica rice varieties, RGD-7S and Taifeng B, whose F1 progeny showed hybrid weakness and hybrid vigor when grown in the early- and late-cropping seasons, respectively. Approximately 150 million 100-bp pair-end reads were generated, which covered ∼86% of the rice (Oryza sativa L. japonica 'Nipponbare') reference genome. A total of 2,758,740 polymorphic sites including 2,408,845 SNPs and 349,895 InDels were detected in RGD-7S and Taifeng B, respectively. Applying stringent parameters, we identified 961,791 SNPs and 46,640 InDels between RGD-7S and Taifeng B (RGD-7S/Taifeng B). The density of DNA polymorphisms was 256.8 SNPs and 12.5 InDels per 100 kb for RGD-7S/Taifeng B. Copy number variations (CNVs) were also investigated. In RGD-7S, 1989 of 2727 CNVs were overlapped in 218 genes, and 1231 of 2010 CNVs were annotated in 175 genes in Taifeng B. In addition, we verified a subset of InDels in the interval of hybrid weakness genes, Hw3 and Hw4, and obtained some polymorphic InDel markers, which will provide a sound foundation for cloning hybrid weakness genes. Analysis of genomic variations will also contribute to understanding the genetic basis of hybrid weakness and heterosis.
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Affiliation(s)
- Chong-Yun Fu
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Wu-Ge Liu
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Di-Lin Liu
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Ji-Hua Li
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Man-Shan Zhu
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Yi-Long Liao
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Zhen-Rong Liu
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Xue-Qin Zeng
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
| | - Feng Wang
- a Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, P.R. China.,b Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou 510640, P.R. China
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14
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Tonosaki K, Osabe K, Kawanabe T, Fujimoto R. The importance of reproductive barriers and the effect of allopolyploidization on crop breeding. BREEDING SCIENCE 2016; 66:333-49. [PMID: 27436943 PMCID: PMC4902455 DOI: 10.1270/jsbbs.15114] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 01/25/2016] [Indexed: 05/04/2023]
Abstract
Inter-specific hybrids are a useful source for increasing genetic diversity. Some reproductive barriers before and/or after fertilization prevent production of hybrid plants by inter-specific crossing. Therefore, techniques to overcome the reproductive barrier have been developed, and have contributed to hybridization breeding. In recent studies, identification of molecules involved in plant reproduction has been studied to understand the mechanisms of reproductive barriers. Revealing the molecular mechanisms of reproductive barriers may allow us to overcome reproductive barriers in inter-specific crossing, and to efficiently produce inter-specific hybrids in cross-combinations that cannot be produced through artificial techniques. Inter-specific hybrid plants can potentially serve as an elite material for plant breeding, produced through the merging of genomes of parental species by allopolyploidization. Allopolyploidization provides some benefits, such as heterosis, increased genetic diversity and phenotypic variability, which are caused by dynamic changes of the genome and epigenome. Understanding of allopolyploidization mechanisms is important for practical utilization of inter-specific hybrids as a breeding material. This review discusses the importance of reproductive barriers and the effect of allopolyploidization in crop breeding programs.
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Affiliation(s)
- Kaoru Tonosaki
- Kihara Institute for Biological Research, Yokohama City University,
641-12 Maioka, Totsuka, Yokohama, Kanagawa 244-0813,
Japan
- Corresponding author (e-mail: )
| | - Kenji Osabe
- Okinawa Institute of Science and Technology,
1919-1 Tancha, Onna-son, Kunigami, Okinawa 904-0495,
Japan
| | - Takahiro Kawanabe
- Graduate School of Agricultural Science, Kobe University,
Rokkodai, Nada-ku, Kobe 657-8501,
Japan
| | - Ryo Fujimoto
- Graduate School of Agricultural Science, Kobe University,
Rokkodai, Nada-ku, Kobe 657-8501,
Japan
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15
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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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16
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A two-locus interaction causes interspecific hybrid weakness in rice. Nat Commun 2015; 5:3357. [PMID: 24556665 PMCID: PMC3948059 DOI: 10.1038/ncomms4357] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Accepted: 01/31/2014] [Indexed: 12/30/2022] Open
Abstract
Reproductive barriers perform a vital role during speciation. Hybrid weakness, the poorer development of hybrids compared with their parents, hinders gene exchange between different species at the postzygotic stage. Here we show that two incompatible dominant loci (Hwi1 and Hwi2) involving three genes are likely to determine the high temperature-dependent expression of hybrid weakness in interspecific hybrids of rice. Hwi1 comprises two leucine-rich repeat receptor-like kinase (LRR-RLK) genes, 25L1 and 25L2, which are specific to wild rice (Oryza rufipogon) and induce hybrid weakness. Hwi2, a rare allele that is predominantly distributed in indica rice (Oryza sativa), encodes a secreted putative subtilisin-like protease. Functional analysis indicated that pyramiding of Hwi1 and Hwi2 activates the autoimmune response in the basal nodes of hybrids, interrupting root formation and then impairing shoot growth. These findings bring new insights into our understanding of reproductive isolation and may benefit rice breeding.
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