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Affiliation(s)
- Patrick G Meirmans
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
| | - Shenglin Liu
- Department of Bioscience, Aarhus University, Aarhus, Denmark
| | - Peter H van Tienderen
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
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van Tienderen PH. GENERALISTS, SPECIALISTS, AND THE EVOLUTION OF PHENOTYPIC PLASTICITY IN SYMPATRIC POPULATIONS OF DISTINCT SPECIES. Evolution 2017; 51:1372-1380. [DOI: 10.1111/j.1558-5646.1997.tb01460.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/1996] [Accepted: 05/16/1997] [Indexed: 11/26/2022]
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Akman M, Kleine R, van Tienderen PH, Schranz EM. Identification of the Submergence Tolerance QTL Come Quick Drowning1 (CQD1) in Arabidopsis thaliana. J Hered 2017; 108:308-317. [DOI: 10.1093/jhered/esx014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 02/12/2017] [Indexed: 01/03/2023] Open
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Heo JY, Feng D, Niu X, Mitchell-Olds T, van Tienderen PH, Tomes D, Schranz ME. Identification of quantitative trait loci and a candidate locus for freezing tolerance in controlled and outdoor environments in the overwintering crucifer Boechera stricta. Plant Cell Environ 2014; 37:2459-69. [PMID: 24811132 PMCID: PMC4416058 DOI: 10.1111/pce.12365] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 04/21/2014] [Accepted: 04/22/2014] [Indexed: 05/29/2023]
Abstract
Development of chilling and freezing tolerance is complex and can be affected by photoperiod, temperature and photosynthetic performance; however, there has been limited research on the interaction of these three factors. We evaluated 108 recombinant inbred lines of Boechera stricta, derived from a cross between lines originating from Montana and Colorado, under controlled long day (LD), short-day (SD) and in an outdoor environment (OE). We measured maximum quantum yield of photosystem II, lethal temperature for 50% survival and electrolyte leakage of leaves. Our results revealed significant variation for chilling and freezing tolerance and photosynthetic performance in different environments. Using both single- and multi-trait analyses, three main-effect quantitative trait loci (QTL) were identified. QTL on linkage group (LG)3 were SD specific, whereas QTL on LG4 were found under both LD and SD. Under all conditions, QTL on LG7 were identified, but were particularly predictive for the outdoor experiment. The co-localization of photosynthetic performance and freezing tolerance effects supports these traits being co-regulated. Finally, the major QTL on LG7 is syntenic to the Arabidopsis C-repeat binding factor locus, known regulators of chilling and freezing responses in Arabidopsis thaliana and other species.
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Affiliation(s)
- Jae-Yun Heo
- Biosystematics Group, Wageningen University & Research Center, Wageningen, the Netherlands
| | - Dongsheng Feng
- Pioneer Hi-Bred International, Inc., a DuPont Business, Johnston, USA
| | - Xiaomu Niu
- Pioneer Hi-Bred International, Inc., a DuPont Business, Johnston, USA
| | | | - Peter H. van Tienderen
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
| | - Dwight Tomes
- Pioneer Hi-Bred International, Inc., a DuPont Business, Johnston, USA
| | - M. Eric Schranz
- Biosystematics Group, Wageningen University & Research Center, Wageningen, the Netherlands
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Hartman Y, Hooftman DAP, Uwimana B, Schranz ME, van de Wiel CCM, Smulders MJM, Visser RGF, Michelmore RW, van Tienderen PH. Abiotic stress QTL in lettuce crop-wild hybrids: comparing greenhouse and field experiments. Ecol Evol 2014; 4:2395-409. [PMID: 25360276 PMCID: PMC4203288 DOI: 10.1002/ece3.1060] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 03/03/2014] [Accepted: 03/11/2014] [Indexed: 11/11/2022] Open
Abstract
The development of stress-tolerant crops is an increasingly important goal of current crop breeding. A higher abiotic stress tolerance could increase the probability of introgression of genes from crops to wild relatives. This is particularly relevant to the discussion on the risks of new GM crops that may be engineered to increase abiotic stress resistance. We investigated abiotic stress QTL in greenhouse and field experiments in which we subjected recombinant inbred lines from a cross between cultivated Lactuca sativa cv. Salinas and its wild relative L. serriola to drought, low nutrients, salt stress, and aboveground competition. Aboveground biomass at the end of the rosette stage was used as a proxy for the performance of plants under a particular stress. We detected a mosaic of abiotic stress QTL over the entire genome with little overlap between QTL from different stresses. The two QTL clusters that were identified reflected general growth rather than specific stress responses and colocated with clusters found in earlier studies for leaf shape and flowering time. Genetic correlations across treatments were often higher among different stress treatments within the same experiment (greenhouse or field), than among the same type of stress applied in different experiments. Moreover, the effects of the field stress treatments were more correlated with those of the greenhouse competition treatments than to those of the other greenhouse stress experiments, suggesting that competition rather than abiotic stress is a major factor in the field. In conclusion, the introgression risk of stress tolerance (trans-)genes under field conditions cannot easily be predicted based on genomic background selection patterns from controlled QTL experiments in greenhouses, especially field data will be needed to assess potential (negative) ecological effects of introgression of these transgenes into wild relatives.
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Affiliation(s)
- Yorike Hartman
- Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam Amsterdam, The Netherlands
| | - Danny A P Hooftman
- Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam Amsterdam, The Netherlands ; NERC, Centre for Ecology and Hydrology Wallingford, UK
| | - Brigitte Uwimana
- Wageningen UR Plant Breeding, Wageningen University and Research Centre Wageningen, The Netherlands
| | - M Eric Schranz
- Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam Amsterdam, The Netherlands
| | - Clemens C M van de Wiel
- Wageningen UR Plant Breeding, Wageningen University and Research Centre Wageningen, The Netherlands
| | - Marinus J M Smulders
- Wageningen UR Plant Breeding, Wageningen University and Research Centre Wageningen, The Netherlands
| | - Richard G F Visser
- Wageningen UR Plant Breeding, Wageningen University and Research Centre Wageningen, The Netherlands
| | - Richard W Michelmore
- Genome Center and Department of Plant Sciences, University of California Davis, California
| | - Peter H van Tienderen
- Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam Amsterdam, The Netherlands
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Ellstrand NC, Meirmans P, Rong J, Bartsch D, Ghosh A, de Jong TJ, Haccou P, Lu BR, Snow AA, Neal Stewart C, Strasburg JL, van Tienderen PH, Vrieling K, Hooftman D. Introgression of Crop Alleles into Wild or Weedy Populations. Annu Rev Ecol Evol Syst 2013. [DOI: 10.1146/annurev-ecolsys-110512-135840] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Norman C. Ellstrand
- Department of Botany and Plant Sciences, University of California, Riverside, California 92521;
| | - Patrick Meirmans
- Instituut voor Biodiversiteit en Ecosysteem Dynamica, Universiteit van Amsterdam, 1098 XH Amsterdam, The Netherlands;
| | - Jun Rong
- Center for Watershed Ecology, Institute of Life Science and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, 330031 Honggutan Nanchang, People's Republic of China;
| | - Detlef Bartsch
- Federal Office of Consumer Protection and Food Safety, 10117 Berlin, Germany;
| | - Atiyo Ghosh
- Integrative Systems Biology, Okinawa Institute of Science and Technology, Okinawa 904-0495, Japan;
| | - Tom J. de Jong
- Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands; ,
| | - Patsy Haccou
- Leiden University College The Hague, Leiden University, 2514 EG The Hague, The Netherlands;
| | - Bao-Rong Lu
- Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering, Department of Ecology and Evolutionary Biology, Fudan University, Shanghai 200433, People's Republic of China; ,
| | - Allison A. Snow
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, Ohio 43210;
| | - C. Neal Stewart
- Department of Plant Sciences, University of Tennessee, Knoxville, Tennessee 37996;
| | | | - Peter H. van Tienderen
- Instituut voor Biodiversiteit en Ecosysteem Dynamica, Universiteit van Amsterdam, 1090 GE Amsterdam, The Netherlands;
| | - Klaas Vrieling
- Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands; ,
| | - Danny Hooftman
- Center for Ecology and Hydrology, National Environmental Research Council, Wallingford, Oxfordshire OX10 8BB, United Kingdom;
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Sasidharan R, Mustroph A, Boonman A, Akman M, Ammerlaan AM, Breit T, Schranz ME, Voesenek LA, van Tienderen PH. Root transcript profiling of two Rorippa species reveals gene clusters associated with extreme submergence tolerance. Plant Physiol 2013; 163:1277-92. [PMID: 24077074 PMCID: PMC3813650 DOI: 10.1104/pp.113.222588] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Accepted: 09/26/2013] [Indexed: 05/07/2023]
Abstract
Complete submergence represses photosynthesis and aerobic respiration, causing rapid mortality in most terrestrial plants. However, some plants have evolved traits allowing them to survive prolonged flooding, such as species of the genus Rorippa, close relatives of Arabidopsis (Arabidopsis thaliana). We studied plant survival, changes in carbohydrate and metabolite concentrations, and transcriptome responses to submergence of two species, Rorippa sylvestris and Rorippa amphibia. We exploited the close relationship between Rorippa species and the model species Arabidopsis by using Arabidopsis GeneChip microarrays for whole-genome transcript profiling of roots of young plants exposed to a 24-h submergence treatment or air. A probe mask was used based on hybridization of genomic DNA of both species to the arrays, so that weak probe signals due to Rorippa species/Arabidopsis mismatches were removed. Furthermore, we compared Rorippa species microarray results with those obtained for roots of submerged Arabidopsis plants. Both Rorippa species could tolerate deep submergence, with R. sylvestris surviving much longer than R. amphibia. Submergence resulted in the induction of genes involved in glycolysis and fermentation and the repression of many energy-consuming pathways, similar to the low-oxygen and submergence response of Arabidopsis and rice (Oryza sativa). The qualitative responses of both Rorippa species to submergence appeared roughly similar but differed quantitatively. Notably, glycolysis and fermentation genes and a gene encoding sucrose synthase were more strongly induced in the less tolerant R. amphibia than in R. sylvestris. A comparison with Arabidopsis microarray studies on submerged roots revealed some interesting differences and potential tolerance-related genes in Rorippa species.
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Affiliation(s)
| | | | | | | | - Ankie M.H. Ammerlaan
- Plant Ecophysiology, Institute for Environmental Biology, Utrecht University 3584CH, Utrecht, The Netherlands (R.S., A.M.H.A., L.A.C.J.V.)
- Plant Physiology, Bayreuth University 95447, Bayreuth, Germany (A.M.); and
- Experimental Plant Systematics, Institute for Biodiversity and Ecosystem Dynamics (A.B., M.A., M.E.S., P.H.v.T.), and Microarray Department Amsterdam and Integrative Bioinformatics Unit, Swammerdam Institute for Life Sciences (T.B.), University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Timo Breit
- Plant Ecophysiology, Institute for Environmental Biology, Utrecht University 3584CH, Utrecht, The Netherlands (R.S., A.M.H.A., L.A.C.J.V.)
- Plant Physiology, Bayreuth University 95447, Bayreuth, Germany (A.M.); and
- Experimental Plant Systematics, Institute for Biodiversity and Ecosystem Dynamics (A.B., M.A., M.E.S., P.H.v.T.), and Microarray Department Amsterdam and Integrative Bioinformatics Unit, Swammerdam Institute for Life Sciences (T.B.), University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | | | - Laurentius A.C.J. Voesenek
- Plant Ecophysiology, Institute for Environmental Biology, Utrecht University 3584CH, Utrecht, The Netherlands (R.S., A.M.H.A., L.A.C.J.V.)
- Plant Physiology, Bayreuth University 95447, Bayreuth, Germany (A.M.); and
- Experimental Plant Systematics, Institute for Biodiversity and Ecosystem Dynamics (A.B., M.A., M.E.S., P.H.v.T.), and Microarray Department Amsterdam and Integrative Bioinformatics Unit, Swammerdam Institute for Life Sciences (T.B.), University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Peter H. van Tienderen
- Plant Ecophysiology, Institute for Environmental Biology, Utrecht University 3584CH, Utrecht, The Netherlands (R.S., A.M.H.A., L.A.C.J.V.)
- Plant Physiology, Bayreuth University 95447, Bayreuth, Germany (A.M.); and
- Experimental Plant Systematics, Institute for Biodiversity and Ecosystem Dynamics (A.B., M.A., M.E.S., P.H.v.T.), and Microarray Department Amsterdam and Integrative Bioinformatics Unit, Swammerdam Institute for Life Sciences (T.B.), University of Amsterdam, 1098 XH Amsterdam, The Netherlands
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Hartman Y, Uwimana B, Hooftman DAP, Schranz ME, van de Wiel CCM, Smulders MJM, Visser RGF, van Tienderen PH. Genomic and environmental selection patterns in two distinct lettuce crop-wild hybrid crosses. Evol Appl 2013; 6:569-84. [PMID: 23789025 PMCID: PMC3684739 DOI: 10.1111/eva.12043] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 11/20/2012] [Indexed: 11/29/2022] Open
Abstract
Genomic selection patterns and hybrid performance influence the chance that crop (trans)genes can spread to wild relatives. We measured fitness(-related) traits in two different field environments employing two different crop–wild crosses of lettuce. We performed quantitative trait loci (QTL) analyses and estimated the fitness distribution of early- and late-generation hybrids. We detected consistent results across field sites and crosses for a fitness QTL at linkage group 7, where a selective advantage was conferred by the wild allele. Two fitness QTL were detected on linkage group 5 and 6, which were unique to one of the crop–wild crosses. Average hybrid fitness was lower than the fitness of the wild parent, but several hybrid lineages outperformed the wild parent, especially in a novel habitat for the wild type. In early-generation hybrids, this may partly be due to heterosis effects, whereas in late-generation hybrids transgressive segregation played a major role. The study of genomic selection patterns can identify crop genomic regions under negative selection across multiple environments and cultivar–wild crosses that might be applicable in transgene mitigation strategies. At the same time, results were cultivar-specific, so that a case-by-case environmental risk assessment is still necessary, decreasing its general applicability.
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Affiliation(s)
- Yorike Hartman
- Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam Amsterdam, The Netherlands
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Uwimana B, Smulders MJM, Hooftman DAP, Hartman Y, van Tienderen PH, Jansen J, McHale LK, Michelmore RW, van de Wiel CCM, Visser RGF. Hybridization between crops and wild relatives: the contribution of cultivated lettuce to the vigour of crop-wild hybrids under drought, salinity and nutrient deficiency conditions. Theor Appl Genet 2012; 125:1097-111. [PMID: 22660630 PMCID: PMC3442173 DOI: 10.1007/s00122-012-1897-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 05/11/2012] [Indexed: 05/10/2023]
Abstract
With the development of transgenic crop varieties, crop-wild hybridization has received considerable consideration with regard to the potential of transgenes to be transferred to wild species. Although many studies have shown that crops can hybridize with their wild relatives and that the resulting hybrids may show improved fitness over the wild parents, little is still known on the genetic contribution of the crop parent to the performance of the hybrids. In this study, we investigated the vigour of lettuce hybrids using 98 F(2:3) families from a cross between cultivated lettuce and its wild relative Lactuca serriola under non-stress conditions and under drought, salinity and nutrient deficiency. Using single nucleotide polymorphism markers, we mapped quantitative trait loci associated with plant vigour in the F(2:3) families and determined the allelic contribution of the two parents. Seventeen QTLs (quantitative trait loci) associated with vigour and six QTLs associated with the accumulation of ions (Na(+), Cl(-) and K(+)) were mapped on the nine linkage groups of lettuce. Seven of the vigour QTLs had a positive effect from the crop allele and six had a positive effect from the wild allele across treatments, and four QTLs had a positive effect from the crop allele in one treatment and from the wild allele in another treatment. Based on the allelic effect of the QTLs and their location on the genetic map, we could suggest genomic locations where transgene integration should be avoided when aiming at the mitigation of its persistence once crop-wild hybridization takes place.
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Affiliation(s)
| | | | | | - Yorike Hartman
- IBED, Universiteit van Amsterdam, Amsterdam, The Netherlands
| | | | | | - Leah K. McHale
- Department of Horticulture and Crop Science, Ohio State University, Columbus, USA
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van Hengstum T, Hooftman DAP, den Nijs HCM, van Tienderen PH. Does insect netting affect the containment of airborne pollen from (GM-) plants in greenhouses? Aerobiologia (Bologna) 2012; 28:325-335. [PMID: 22798704 PMCID: PMC3389241 DOI: 10.1007/s10453-011-9237-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Accepted: 11/04/2011] [Indexed: 06/01/2023]
Abstract
Greenhouses are a well-accepted containment strategy to grow and study genetically modified plants (GM) before release into the environment. Various containment levels are requested by national regulations to minimize GM pollen escape. We tested the amount of pollen escaping from a standard greenhouse, which can be used for EU containment classes 1 and 2. More specifically, we investigated the hypothesis whether pollen escape could be minimized by insect-proof netting in front of the roof windows, since the turbulent airflow around the mesh wiring could avoid pollen from escaping. We studied the pollen flow out of greenhouses with and without insect netting of two non-transgenic crops, Ryegrass (Loliummultiflorum) and Corn (Zea Mays). Pollen flow was assessed with Rotorod(®) pollen samplers positioned inside and outside the greenhouse' roof windows. A significant proportion of airborne pollen inside the greenhouse leaves through roof windows. Moreover, the lighter pollen of Lolium escaped more readily than the heavier pollen of Maize. In contrast to our expectations, we did not identify any reduction in pollen flow with insect netting in front of open windows, even under induced airflow conditions. We conclude that insect netting, often present by default in greenhouses, is not effective in preventing pollen escape from greenhouses of wind-pollinated plants for containment classes 1 or 2. Further research would be needed to investigate whether other alternative strategies, including biotic ones, are more effective. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10453-011-9237-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Thomas van Hengstum
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, Amsterdam, The Netherlands
| | | | - Hans C. M. den Nijs
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, Amsterdam, The Netherlands
| | - Peter H. van Tienderen
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, Amsterdam, The Netherlands
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Hartman Y, Hooftman DAP, Uwimana B, van de Wiel CCM, Smulders MJM, Visser RGF, van Tienderen PH. Genomic regions in crop-wild hybrids of lettuce are affected differently in different environments: implications for crop breeding. Evol Appl 2012; 5:629-40. [PMID: 23028403 PMCID: PMC3461145 DOI: 10.1111/j.1752-4571.2012.00240.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 12/21/2011] [Indexed: 11/30/2022] Open
Abstract
Many crops contain domestication genes that are generally considered to lower fitness of crop-wild hybrids in the wild environment. Transgenes placed in close linkage with such genes would be less likely to spread into a wild population. Therefore, for environmental risk assessment of GM crops, it is important to know whether genomic regions with such genes exist, and how they affect fitness. We performed quantitative trait loci (QTL) analyses on fitness(-related) traits in two different field environments employing recombinant inbred lines from a cross between cultivated Lactuca sativa and its wild relative Lactuca serriola. We identified a region on linkage group 5 where the crop allele consistently conferred a selective advantage (increasing fitness to 212% and 214%), whereas on linkage group 7, a region conferred a selective disadvantage (reducing fitness to 26% and 5%), mainly through delaying flowering. The probability for a putative transgene spreading would therefore depend strongly on the insertion location. Comparison of these field results with greenhouse data from a previous study using the same lines showed considerable differences in QTL patterns. This indicates that care should be taken when extrapolating experiments from the greenhouse, and that the impact of domestication genes has to be assessed under field conditions.
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Affiliation(s)
- Yorike Hartman
- Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam Amsterdam, The Netherlands
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Akman M, Bhikharie AV, McLean EH, Boonman A, Visser EJW, Schranz ME, van Tienderen PH. Wait or escape? Contrasting submergence tolerance strategies of Rorippa amphibia, Rorippa sylvestris and their hybrid. Ann Bot 2012; 109:1263-76. [PMID: 22499857 PMCID: PMC3359918 DOI: 10.1093/aob/mcs059] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 02/15/2012] [Indexed: 05/22/2023]
Abstract
BACKGROUND AND AIMS Differential responses of closely related species to submergence can provide insight into the evolution and mechanisms of submergence tolerance. Several traits of two wetland species from habitats with contrasting flooding regimes, Rorippa amphibia and Rorippa sylvestris, as well as F(1) hybrid Rorippa × anceps were analysed to unravel mechanisms underlying submergence tolerance. METHODS In the first submergence experiment (lasting 20 d) we analysed biomass, stem elongation and carbohydrate content. In the second submergence experiment (lasting 3 months) we analysed survival and the effect of re-establishment of air contact on biomass and carbohydrate content. In a separate experiment we analysed expression of two carbohydrate catabolism genes, ADH1 and SUS1, upon re-establishment of air contact following submergence. KEY RESULTS All plants had low mortality even after 3 months of submergence. Rorippa sylvestris was characterized by 100 % survival and higher carbohydrate levels coupled with lower ADH1 gene expression as well as reduced growth compared with R. amphibia. Rorippa amphibia and the hybrid elongated their stems but this did not pay-off in higher survival when plants remained submerged. Only R. amphibia and the hybrid benefited in terms of increased biomass and carbohydrate accumulation upon re-establishing air contact. CONCLUSIONS Results demonstrate contrasting 'escape' and 'quiescence' strategies between Rorippa species. Being a close relative of arabidopsis, Rorippa is an excellent model for future studies on the molecular mechanism(s) controlling these strategies.
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Affiliation(s)
- Melis Akman
- Experimental Plant Systematics, Institute for Biodiversity and Ecosystem Dynamics, Universiteit van Amsterdam, Science Park 904, Amsterdam, The Netherlands.
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Uwimana B, Smulders MJM, Hooftman DAP, Hartman Y, van Tienderen PH, Jansen J, McHale LK, Michelmore RW, Visser RGF, van de Wiel CCM. Crop to wild introgression in lettuce: following the fate of crop genome segments in backcross populations. BMC Plant Biol 2012; 12:43. [PMID: 22448748 PMCID: PMC3384248 DOI: 10.1186/1471-2229-12-43] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Accepted: 03/26/2012] [Indexed: 05/09/2023]
Abstract
BACKGROUND After crop-wild hybridization, some of the crop genomic segments may become established in wild populations through selfing of the hybrids or through backcrosses to the wild parent. This constitutes a possible route through which crop (trans)genes could become established in natural populations. The likelihood of introgression of transgenes will not only be determined by fitness effects from the transgene itself but also by the crop genes linked to it. Although lettuce is generally regarded as self-pollinating, outbreeding does occur at a low frequency. Backcrossing to wild lettuce is a likely pathway to introgression along with selfing, due to the high frequency of wild individuals relative to the rarely occurring crop-wild hybrids. To test the effect of backcrossing on the vigour of inter-specific hybrids, Lactuca serriola, the closest wild relative of cultivated lettuce, was crossed with L. sativa and the F(1) hybrid was backcrossed to L. serriola to generate BC(1) and BC(2) populations. Experiments were conducted on progeny from selfed plants of the backcrossing families (BC(1)S(1) and BC(2)S(1)). Plant vigour of these two backcrossing populations was determined in the greenhouse under non-stress and abiotic stress conditions (salinity, drought, and nutrient deficiency). RESULTS Despite the decreasing contribution of crop genomic blocks in the backcross populations, the BC(1)S(1) and BC(2)S(1) hybrids were characterized by a substantial genetic variation under both non-stress and stress conditions. Hybrids were identified that performed equally or better than the wild genotypes, indicating that two backcrossing events did not eliminate the effect of the crop genomic segments that contributed to the vigour of the BC(1) and BC(2) hybrids. QTLs for plant vigour under non-stress and the various stress conditions were detected in the two populations with positive as well as negative effects from the crop. CONCLUSION As it was shown that the crop contributed QTLs with either a positive or a negative effect on plant vigour, we hypothesize that genomic regions exist where transgenes could preferentially be located in order to mitigate their persistence in natural populations through genetic hitchhiking.
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Affiliation(s)
- Brigitte Uwimana
- Wageningen UR Plant Breeding, Postbus 386, 6700AJ Wageningen, the Netherlands
| | - Marinus JM Smulders
- Wageningen UR Plant Breeding, Postbus 16, 6700AA Wageningen, the Netherlands
| | - Danny AP Hooftman
- Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Yorike Hartman
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Postbus 94248, 1090 GE Amsterdam, the Netherlands
| | - Peter H van Tienderen
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Postbus 94248, 1090 GE Amsterdam, the Netherlands
| | - Johannes Jansen
- Wageningen UR Plant Biometris, Postbus 100, 6700AC Wageningen, the Netherlands
| | - Leah K McHale
- Department of Horticulture and Crop Science, The Ohio State University, Columbus, OH 43210, USA
| | - Richard W Michelmore
- Genome Center and Department of Plant Sciences, University of California Davis, Davis, CA 95616-8816, USA
| | - Richard GF Visser
- Wageningen UR Plant Breeding, Postbus 386, 6700AJ Wageningen, the Netherlands
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Stift M, Bregman R, Oostermeijer JGB, van Tienderen PH. Other tetraploid species and conspecific diploids as sources of genetic variation for an autotetraploid. Am J Bot 2010; 97:1858-1866. [PMID: 21616824 DOI: 10.3732/ajb.1000048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
PREMISE OF THE STUDY Most plants are polyploid and have more than two copies of the genome. The evolutionary success of polyploids is often attributed to their potential to harbor increased genetic variation, but it is poorly understood how polyploids can attain such variation. Because of their formation bottleneck, newly formed tetraploids start out with little variation. Tetraploids may attain genetic variation through a combination of new mutations, recurrent formation, and gene exchange with diploid ancestors or related tetraploid species. We explore the role of gene exchange and introgression in autotetraploid Rorippa amphibia, a species that harbors more genetic variation than its diploid ancestors. • METHODS We crossed autotetraploid R. amphibia to diploid conspecifics and tetraploid R. sylvestris and backcrossed resulting F(1) hybrids. We used flow cytometry to determine the ploidy of all progeny. • KEY RESULTS Tetraploids of R. amphibia and R. sylvestris were interfertile; F(1) hybrids were fertile and could backcross. Crosses between diploids and tetraploids yielded a small number of viable, often tetraploid progeny. This indicates that unreduced gametes can facilitate gene flow from diploids to tetraploids. We detected a frequency of unreduced gametes of around 2.7 per 1000, which was comparable between diploids and tetraploids. • CONCLUSIONS Introgression from tetraploid R. sylvestris provides a realistic source of variation in autotetraploid R. amphibia. Only in a scenario where other compatible partners are absent, for example immediately after tetraploidization, gene flow through unreduced gametes from diploids could be an important source of genetic variation for tetraploids.
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Affiliation(s)
- Marc Stift
- Division of Ecology and Evolutionary Biology, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
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Stift M, Berenos C, Kuperus P, van Tienderen PH. Segregation models for disomic, tetrasomic and intermediate inheritance in tetraploids: a general procedure applied to Rorippa (yellow cress) microsatellite data. Genetics 2008; 179:2113-23. [PMID: 18689891 PMCID: PMC2516083 DOI: 10.1534/genetics.107.085027] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2007] [Accepted: 05/25/2008] [Indexed: 11/18/2022] Open
Abstract
Tetraploid inheritance has two extremes: disomic in allotetraploids and tetrasomic in autotetraploids. The possibility of mixed, or intermediate, inheritance models has generally been neglected. These could well apply to newly formed hybrids or to diploidizing (auto)tetraploids. We present a simple likelihood-based approach that is able to incorporate disomic, tetrasomic, and intermediate inheritance models and estimates the double-reduction rate. Our model shows that inheritance of microsatellite markers in natural tetraploids of Rorippa amphibia and R. sylvestris is tetrasomic, confirming their autotetraploid origin. However, in F(1) hybrids inheritance was intermediate to disomic and tetrasomic inheritance. Apparently, in meiosis, chromosomes paired preferentially with the homolog from the same parental species, but not strictly so. Detected double-reduction rates were low. We tested the general applicability of our model, using published segregation data. In two cases, an intermediate inheritance model gave a better fit to the data than the tetrasomic model advocated by the authors. The existence of inheritance intermediate to disomic and tetrasomic has important implications for linkage mapping and population genetics and hence breeding programs of tetraploids. Methods that have been developed for either disomic or tetrasomic tetraploids may not be generally applicable, particularly in systems where hybridization is common.
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Affiliation(s)
- Marc Stift
- Experimental Plant Systematics, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, 1090 GB Amsterdam, The Netherlands.
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