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Jacobson S, Bondarchuk N, Nguyen TA, Canada A, McCord L, Artlip TS, Welser P, Klocko AL. Apple CRISPR-Cas9-A Recipe for Successful Targeting of AGAMOUS-like Genes in Domestic Apple. PLANTS (BASEL, SWITZERLAND) 2023; 12:3693. [PMID: 37960050 PMCID: PMC10649517 DOI: 10.3390/plants12213693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/19/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023]
Abstract
Fruit trees and other fruiting hardwood perennials are economically valuable, and there is interest in developing improved varieties. Both conventional breeding and biotechnology approaches are being utilized towards the goal of developing advanced cultivars. Increased knowledge of the effectiveness and efficiency of biotechnology approaches can help guide use of the CRISPR gene-editing technology. Here, we examined CRISPR-Cas9-directed genome editing in the valuable commodity fruit tree Malus x domestica (domestic apple). We transformed two cultivars with dual CRISPR-Cas9 constructs designed to target two AGAMOUS-like genes simultaneously. The main goal was to determine the effectiveness of this approach for achieving target gene changes. We obtained 6 Cas9 control and 38 independent CRISPR-Cas9 events. Of the 38 CRISPR-Cas9 events, 34 (89%) had gene edits and 14 (37%) showed changes to all alleles of both target genes. The most common change was large deletions, which were present in 59% of all changed alleles, followed by small deletions (21%), small insertions (12%), and a combination of small insertions and deletions (8%). Overall, a high rate of successful gene alterations was found. Many of these changes are predicted to cause frameshifts and alterations to the predicted peptides. Future work will include monitoring the floral development and floral form.
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Affiliation(s)
- Seth Jacobson
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
| | - Natalie Bondarchuk
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
| | - Thy Anh Nguyen
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
| | - Allison Canada
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
| | - Logan McCord
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
| | - Timothy S. Artlip
- U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS), The Appalachian Fruit Research Station, 2217 Wiltshire Road, Kearneysville, WV 25430, USA;
| | - Philipp Welser
- U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS), The Appalachian Fruit Research Station, 2217 Wiltshire Road, Kearneysville, WV 25430, USA;
| | - Amy L. Klocko
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
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2
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Klocko AL, Elorriaga E, Ma C, Strauss SH. Variation in floral form of CRISPR knock-outs of the poplar homologs of LEAFY and AGAMOUS after FT heat-induced early flowering. HORTICULTURE RESEARCH 2023; 10:uhad132. [PMID: 37564267 PMCID: PMC10410293 DOI: 10.1093/hr/uhad132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/20/2023] [Indexed: 08/12/2023]
Abstract
Plant migration and gene flow from genetically modified or exotic trees to nearby lands or by crossing with wild relatives is a major public and regulatory concern. Many genetic strategies exist to mitigate potential gene flow; however, the long delay in onset of flowering is a severe constraint to research progress. We used heat-induced FT overexpression to speed assessment of the expected floral phenotypes after CRISPR knockout of poplar homologs of the key floral genes, LEAFY and AGAMOUS. We selected events with previously characterized CRISPR-Cas9 induced biallelic changes then re-transformed them with the Arabidopsis thaliana FLOWERING LOCUS T (AtFT) gene under control of either a strong constitutive promoter or a heat-inducible promoter. We successfully obtained flowering in both a male and female clones of poplar, observing a wide range of inflorescence and floral forms among flowers, ramets, and insertion events. Overall, flowers obtained from the selected LFY and AG targeted events were consistent with what would be predicted for loss-of-function of these genes. LFY-targeted events showed small catkins with leaf-like organs, AG-targeted events had nested floral organs consistent with reduction in floral determinacy and absence of well-formed carpels or anthers. These findings demonstrate the great developmental plasticity of Populus flowers during genetically accelerated flowering, which may be of horticultural value. They also provide an informative early view of floral phenotypes and apparent sterility from knockouts of both these gene targets.
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Affiliation(s)
- Amy L Klocko
- Department of Biology, University of Colorado Colorado Springs, Colorado Springs, CO 80918, USA
| | - Estefania Elorriaga
- Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, USA
| | - Cathleen Ma
- Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, USA
| | - Steven H Strauss
- Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, USA
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3
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Nagle MF, Nahata SS, Zahl B, Niño de Rivera A, Tacker XV, Elorriaga E, Ma C, Goralogia GS, Klocko AL, Gordon M, Joshi S, Strauss SH. Knockout of floral and meiosis genes using CRISPR/Cas9 produces male-sterility in Eucalyptus without impacts on vegetative growth. PLANT DIRECT 2023; 7:e507. [PMID: 37456612 PMCID: PMC10345981 DOI: 10.1002/pld3.507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/28/2023] [Accepted: 06/01/2023] [Indexed: 07/18/2023]
Abstract
Eucalyptus spp. are widely cultivated for the production of pulp, energy, essential oils, and as ornamentals. However, their dispersal from plantings, especially when grown as an exotic, can cause ecological disruptions. To provide new tools for prevention of sexual dispersal by pollen as well as to induce male-sterility for hybrid breeding, we studied the clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9-mediated knockout of three floral genes in both FT-expressing (early-flowering) and non-FT genotypes. We report male-sterile phenotypes resulting from knockout of the homologs of all three genes, including one involved in meiosis and two regulating early stages of pollen development. The targeted genes were Eucalyptus homologs of REC8 (EREC8), TAPETAL DEVELOPMENT AND FUNCTION 1 (ETDF1), and HECATE3 (EHEC3-like). The erec8 knockouts yielded abnormal pollen grains and a predominance of inviable pollen, whereas the etdf1 and ehec3-like knockouts produced virtually no pollen. In addition to male-sterility, both erec8 and ehec3-like knockouts may provide complete sterility because the failure of erec8 to undergo meiosis is expected to be independent of sex, and ehec3-like knockouts produce flowers with shortened styles and no visible stigmas. When comparing knockouts to controls in wild-type (non-early-flowering) backgrounds, we did not find visible morphological or statistical differences in vegetative traits, including average single-leaf mass, stem volume, density of oil glands, or chlorophyll in leaves. Loss-of-function mutations in any of these three genes show promise as a means of inducing male- or complete sterility without impacting vegetative development.
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Affiliation(s)
- Michael F. Nagle
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Surbhi S. Nahata
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Bahiya Zahl
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Alexa Niño de Rivera
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Xavier V. Tacker
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Estefania Elorriaga
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Cathleen Ma
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Greg S. Goralogia
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Amy L. Klocko
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Michael Gordon
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Sonali Joshi
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
| | - Steven H. Strauss
- Department of Forest Ecosystems and SocietyOregon State UniversityCorvallisOregonUSA
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4
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Hemalatha P, Abda EM, Shah S, Venkatesa Prabhu S, Jayakumar M, Karmegam N, Kim W, Govarthanan M. Multi-faceted CRISPR-Cas9 strategy to reduce plant based food loss and waste for sustainable bio-economy - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117382. [PMID: 36753844 DOI: 10.1016/j.jenvman.2023.117382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/14/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Currently, international development requires innovative solutions to address imminent challenges like climate change, unsustainable food system, food waste, energy crisis, and environmental degradation. All the same, addressing these concerns with conventional technologies is time-consuming, causes harmful environmental impacts, and is not cost-effective. Thus, biotechnological tools become imperative for enhancing food and energy resilience through eco-friendly bio-based products by valorisation of plant and food waste to meet the goals of circular bioeconomy in conjunction with Sustainable Developmental Goals (SDGs). Genome editing can be accomplished using a revolutionary DNA modification tool, CRISPR-Cas9, through its uncomplicated guided mechanism, with great efficiency in various organisms targeting different traits. This review's main objective is to examine how the CRISPR-Cas system, which has positive features, could improve the bioeconomy by reducing food loss and waste with all-inclusive food supply chain both at on-farm and off-farm level; utilising food loss and waste by genome edited microorganisms through food valorisation; efficient microbial conversion of low-cost substrates as biofuel; valorisation of agro-industrial wastes; mitigating greenhouse gas emissions through forestry plantation crops; and protecting the ecosystem and environment. Finally, the ethical implications and regulatory issues that are related to CRISPR-Cas edited products in the international markets have also been taken into consideration.
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Affiliation(s)
- Palanivel Hemalatha
- Department of Biotechnology, Center of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Ebrahim M Abda
- Department of Biotechnology, Center of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Shipra Shah
- Department of Forestry, College of Agriculture, Fisheries and Forestry, Fiji National University, Kings Road, Koronivia, P. O. Box 1544, Nausori, Republic of Fiji
| | - S Venkatesa Prabhu
- Department of Chemical Engineering, Center of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - M Jayakumar
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia.
| | - N Karmegam
- PG and Research Department of Botany, Government Arts College (Autonomous), Salem, 636 007, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, India.
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5
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Anders C, Hoengenaert L, Boerjan W. Accelerating wood domestication in forest trees through genome editing: Advances and prospects. CURRENT OPINION IN PLANT BIOLOGY 2023; 71:102329. [PMID: 36586396 PMCID: PMC7614060 DOI: 10.1016/j.pbi.2022.102329] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/07/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
The high economic value of wood requires intensive breeding towards multipurpose biomass. However, long breeding cycles hamper the fast development of novel tree varieties that have improved biomass properties, are tolerant to biotic and abiotic stresses, and resilient to climate change. To speed up domestication, the integration of conventional breeding and new breeding techniques is needed. In this review, we discuss recent advances in genome editing and Cas-DNA-free genome engineering of forest trees, and briefly discuss how multiplex editing combined with multi-omics approaches can accelerate the genetic improvement of forest trees, with a focus on wood.
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Affiliation(s)
- Chantal Anders
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Lennart Hoengenaert
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Wout Boerjan
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; VIB Center for Plant Systems Biology, 9052 Ghent, Belgium.
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6
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Kalaitzandonakes N, Willig C, Zahringer K. The economics and policy of genome editing in crop improvement. THE PLANT GENOME 2022:e20248. [PMID: 36321718 DOI: 10.1002/tpg2.20248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/26/2022] [Indexed: 06/16/2023]
Abstract
In this review article we analyze the economics of genome editing and its potential long-term effect on crop improvement and agriculture. We describe the emergence of genome editing as a novel platform for crop improvement, distinct from the existing platforms of plant breeding and genetic engineering. We review key technical characteristics of genome editing and describe how it enables faster trait development, lower research and development costs, and the development of novel traits not possible through previous crop improvement methods. Given these fundamental technical and economic advantages, we describe how genome editing can greatly increase the productivity and broaden the scope of crop improvement with potential outsized economic effects. We further discuss how the global regulatory policy environment, which is still emerging, can shape the ultimate path of genome editing innovation, its effect on crop improvement, and its overall socioeconomic benefits to society.
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Affiliation(s)
| | | | - Kenneth Zahringer
- Division of Applied Social Sciences, Univ. of Missouri, Columbia, MO, 65211, USA
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7
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Genome-Wide Identification of the Eucalyptus urophylla GATA Gene Family and Its Diverse Roles in Chlorophyll Biosynthesis. Int J Mol Sci 2022; 23:ijms23095251. [PMID: 35563644 PMCID: PMC9102942 DOI: 10.3390/ijms23095251] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/04/2022] [Accepted: 05/06/2022] [Indexed: 01/25/2023] Open
Abstract
GATA transcription factors have been demonstrated to play key regulatory roles in plant growth, development, and hormonal response. However, the knowledge concerning the evolution of GATA genes in Eucalyptus urophylla and their trans-regulatory interaction is indistinct. Phylogenetic analysis and study of conserved motifs, exon structures, and expression patterns resolved the evolutionary relationships of these GATA proteins. Phylogenetic analysis showed that EgrGATAs are broadly distributed in four subfamilies. Cis-element analysis of promoters revealed that EgrGATA genes respond to light and are influenced by multiple hormones and abiotic stresses. Transcriptome analysis revealed distinct temporal and spatial expression patterns of EgrGATA genes in various tissues of E. urophylla S.T.Blake, which was confirmed by real-time quantitative PCR (RT-qPCR). Further research revealed that EurGNC and EurCGA1 were localized in the nucleus, and EurGNC directly binds to the cis-element of the EurGUN5 promoter, implying its potential roles in the regulation of chlorophyll synthesis. This comprehensive study provides new insights into the evolution of GATAs and could help to improve the photosynthetic assimilation and vegetative growth of E. urophylla at the genetic level.
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8
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Bai X, Ke J, Huang P, Fatima I, Cheng T, Tang M. Promotion of natural flowers by JcFT depends on JcLFY in the perennial woody species Jatropha curcas. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 318:111236. [PMID: 35351308 DOI: 10.1016/j.plantsci.2022.111236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/10/2022] [Accepted: 02/20/2022] [Indexed: 06/14/2023]
Abstract
Production of normal gametes is necessary for flowering plant reproduction, which involves the transition from vegetative to reproductive stage and floral organ development. Such transitions and floral development are modulated by various environmental and endogenous stimuli and controlled by sophisticated regulatory networks. FLOWERING LOCUS T (FT) and LEAFY (LFY) are two key genes that integrate signals from multiple genetic pathways in Arabidopsis. However, the comprehensive functions and relationship between these two genes in trees are poorly understood. In this study, we found that JcFT played a vital role in regulating the flowering transition in the perennial woody species Jatropha curcas. JcLFY also involved in regulating this transition and controlled floral organ development. The non-flowering phenotype of JcFT-RNAi was rescued successfully by overexpression of JcLFY, while the abnormal flowers produced by JcLFY silencing were not recovered by JcFT overexpression via hybridization. These results indicate that JcFT, in which a mutation leads to a nonflowering phenotype, is the central gene of the floral meristem transition and that JcLFY, in which a mutation leads to striking changes in flowering and often sterility, is the central floral and inflorescence development gene. Moreover, our hybridization results suggest that JcLFY acts downstream of JcFT in Jatropha.
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Affiliation(s)
- Xue Bai
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; School of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiapeng Ke
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Ping Huang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; School of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Iza Fatima
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; College of Agronomy and Biotechnology, China Agricultural University, Beijing 100083, China
| | - Tong Cheng
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China
| | - Mingyong Tang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Innovative Academy of Seed Design, Chinese Academy of Sciences, Menglun, Yunnan 666303, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Menglun, Mengla 666303, China.
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9
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Wu YM, Ma YJ, Wang M, Zhou H, Gan ZM, Zeng RF, Ye LX, Zhou JJ, Zhang JZ, Hu CG. Mobility of FLOWERING LOCUS T protein as a systemic signal in trifoliate orange and its low accumulation in grafted juvenile scions. HORTICULTURE RESEARCH 2022; 9:uhac056. [PMID: 35702366 PMCID: PMC9186307 DOI: 10.1093/hr/uhac056] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/21/2022] [Indexed: 05/29/2023]
Abstract
The long juvenile period of perennial woody plants is a major constraint in breeding programs. FLOWERING LOCUS T (FT) protein is an important mobile florigen signal that induces plant flowering. However, whether FT can be transported in woody plants to shorten the juvenile period is unknown, and its transport mechanism remains unclear. In this study, trifoliate orange FT (ToFT) and Arabidopsis FT (AtFT, which has been confirmed to be transportable in Arabidopsis) as a control were transformed into tomato and trifoliate orange, and early flowering was induced in the transgenic plants. Long-distance and two-way (upward and downward) transmission of ToFT and AtFT proteins was confirmed in both tomato and trifoliate orange using grafting and western blot analysis. However, rootstocks of transgenic trifoliate orange could not induce flowering in grafted wild-type juvenile scions because of the low accumulation of total FT protein in the grafted scions. It was further confirmed that endogenous ToFT protein was reduced in trifoliate orange, and the accumulation of the transported ToFT and AtFT proteins was lower than that in grafted juvenile tomato scions. Furthermore, the trifoliate orange FT-INTERACTING PROTEIN1 homolog (ToFTIP1) was isolated by yeast two-hybrid analysis. The FTIP1 homolog may regulate FT transport by interacting with FT in tomato and trifoliate orange. Our findings suggest that FT transport may be conserved between the tomato model and woody plants. However, in woody plants, the transported FT protein did not accumulate in significant amounts in the grafted wild-type juvenile scions and induce the scions to flower.
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10
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Cao HX, Vu GTH, Gailing O. From Genome Sequencing to CRISPR-Based Genome Editing for Climate-Resilient Forest Trees. Int J Mol Sci 2022; 23:966. [PMID: 35055150 PMCID: PMC8780650 DOI: 10.3390/ijms23020966] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 12/11/2022] Open
Abstract
Due to the economic and ecological importance of forest trees, modern breeding and genetic manipulation of forest trees have become increasingly prevalent. The CRISPR-based technology provides a versatile, powerful, and widely accepted tool for analyzing gene function and precise genetic modification in virtually any species but remains largely unexplored in forest species. Rapidly accumulating genetic and genomic resources for forest trees enabled the identification of numerous genes and biological processes that are associated with important traits such as wood quality, drought, or pest resistance, facilitating the selection of suitable gene editing targets. Here, we introduce and discuss the latest progress, opportunities, and challenges of genome sequencing and editing for improving forest sustainability.
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Affiliation(s)
- Hieu Xuan Cao
- Forest Genetics and Forest Tree Breeding, Georg-August University of Göttingen, Büsgenweg 2, 37077 Gottingen, Germany;
| | - Giang Thi Ha Vu
- Forest Genetics and Forest Tree Breeding, Georg-August University of Göttingen, Büsgenweg 2, 37077 Gottingen, Germany;
| | - Oliver Gailing
- Forest Genetics and Forest Tree Breeding, Georg-August University of Göttingen, Büsgenweg 2, 37077 Gottingen, Germany;
- Center for Integrated Breeding Research (CiBreed), Georg-August University of Göttingen, 37073 Gottingen, Germany
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11
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Yin Y, Wang C, Xiao D, Liang Y, Wang Y. Advances and Perspectives of Transgenic Technology and Biotechnological Application in Forest Trees. FRONTIERS IN PLANT SCIENCE 2021; 12:786328. [PMID: 34917116 PMCID: PMC8669725 DOI: 10.3389/fpls.2021.786328] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 10/25/2021] [Indexed: 06/14/2023]
Abstract
Transgenic technology is increasingly used in forest-tree breeding to overcome the disadvantages of traditional breeding methods, such as a long breeding cycle, complex cultivation environment, and complicated procedures. By introducing exogenous DNA, genes tightly related or contributed to ideal traits-including insect, disease, and herbicide resistance-were transferred into diverse forest trees, and genetically modified (GM) trees including poplars were cultivated. It is beneficial to develop new varieties of GM trees of high quality and promote the genetic improvement of forests. However, the low transformation efficiency has hampered the cultivation of GM trees and the identification of the molecular genetic mechanism in forest trees compared to annual herbaceous plants such as Oryza sativa. In this study, we reviewed advances in transgenic technology of forest trees, including the principles, advantages and disadvantages of diverse genetic transformation methods, and their application for trait improvement. The review provides insight into the establishment and improvement of genetic transformation systems for forest tree species. Challenges and perspectives pertaining to the genetic transformation of forest trees are also discussed.
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Affiliation(s)
- Yiyi Yin
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
| | - Chun Wang
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
| | - Dandan Xiao
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
| | - Yanting Liang
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
| | - Yanwei Wang
- National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, The Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing, China
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, China
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
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12
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Ahmar S, Ballesta P, Ali M, Mora-Poblete F. Achievements and Challenges of Genomics-Assisted Breeding in Forest Trees: From Marker-Assisted Selection to Genome Editing. Int J Mol Sci 2021; 22:10583. [PMID: 34638922 PMCID: PMC8508745 DOI: 10.3390/ijms221910583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 12/23/2022] Open
Abstract
Forest tree breeding efforts have focused mainly on improving traits of economic importance, selecting trees suited to new environments or generating trees that are more resilient to biotic and abiotic stressors. This review describes various methods of forest tree selection assisted by genomics and the main technological challenges and achievements in research at the genomic level. Due to the long rotation time of a forest plantation and the resulting long generation times necessary to complete a breeding cycle, the use of advanced techniques with traditional breeding have been necessary, allowing the use of more precise methods for determining the genetic architecture of traits of interest, such as genome-wide association studies (GWASs) and genomic selection (GS). In this sense, main factors that determine the accuracy of genomic prediction models are also addressed. In turn, the introduction of genome editing opens the door to new possibilities in forest trees and especially clustered regularly interspaced short palindromic repeats and CRISPR-associated protein 9 (CRISPR/Cas9). It is a highly efficient and effective genome editing technique that has been used to effectively implement targetable changes at specific places in the genome of a forest tree. In this sense, forest trees still lack a transformation method and an inefficient number of genotypes for CRISPR/Cas9. This challenge could be addressed with the use of the newly developing technique GRF-GIF with speed breeding.
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Affiliation(s)
- Sunny Ahmar
- Institute of Biological Sciences, University of Talca, 1 Poniente 1141, Talca 3460000, Chile;
| | - Paulina Ballesta
- The National Fund for Scientific and Technological Development, Av. del Agua 3895, Talca 3460000, Chile
| | - Mohsin Ali
- Department of Forestry and Range Management, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan;
| | - Freddy Mora-Poblete
- Institute of Biological Sciences, University of Talca, 1 Poniente 1141, Talca 3460000, Chile;
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