1
|
Presotto A, Hernández F, Vercellino RB, Kruger RD, Fontana ML, Ureta MS, Crepy M, Auge G, Caicedo A. Introgression from local cultivars is a driver of agricultural adaptation in Argentinian weedy rice. Mol Ecol 2024; 33:e17368. [PMID: 38676602 DOI: 10.1111/mec.17368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 04/11/2024] [Accepted: 04/15/2024] [Indexed: 04/29/2024]
Abstract
Weedy rice, a pervasive and troublesome weed found across the globe, has often evolved through fertilization of rice cultivars with little importance of crop-weed gene flow. In Argentina, weedy rice has been reported as an important constraint since the early 1970s, and, in the last few years, strains with herbicide-resistance are suspected to evolve. Despite their importance, the origin and genetic composition of Argentinian weedy rice as well its adaptation to agricultural environments has not been explored so far. To study this, we conducted genotyping-by-sequencing on samples of Argentinian weedy and cultivated rice and compared them with published data from weedy, cultivated and wild rice accessions distributed worldwide. In addition, we conducted a phenotypic characterization for weedy-related traits, a herbicide resistance screening and genotyped accessions for known mutations in the acetolactate synthase (ALS) gene, which confers herbicide resistance. Our results revealed large phenotypic variability in Argentinian weedy rice. Most strains were resistant to ALS-inhibiting herbicides with a high frequency of the ALS mutation (A122T) present in Argentinian rice cultivars. Argentinian cultivars belonged to the three major genetic groups of rice: japonica, indica and aus while weeds were mostly aus or aus-indica admixed, resembling weedy rice strains from the Southern Cone region. Phylogenetic analysis supports a single origin for aus-like South American weeds, likely as seed contaminants from the United States, and then admixture with local indica cultivars. Our findings demonstrate that crop to weed introgression can facilitate rapid adaptation to agriculture environments.
Collapse
Affiliation(s)
- Alejandro Presotto
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Fernando Hernández
- Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Román Boris Vercellino
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | | | | | - María Soledad Ureta
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - María Crepy
- EEA INTA Concepción del Uruguay-CONICET, Concepción del Uruguay, Entre Ríos, Argentina
| | - Gabriela Auge
- Centro de Investigaciones en Ciencias Agronómicas y Veterinarias (CICVyA), Instituto de Agrobiotecnología y Biología Molecular (IABIMO) - (INTA-CONICET), Instituto de Biotecnología, Hurlingham, Buenos Aires, Argentina
| | - Ana Caicedo
- Deparment of Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| |
Collapse
|
2
|
Bhupenchandra I, Chongtham SK, Gangarani Devi A, Dutta P, Lamalakshmi E, Mohanty S, Choudhary AK, Das A, Sarika K, Kumar S, Yumnam S, Sagolsem D, Rupert Anand Y, Bhutia DD, Victoria M, Vinodh S, Tania C, Dhanachandra Sharma A, Deb L, Sahoo MR, Seth CS, Swapnil P, Meena M. Harnessing weedy rice as functional food and source of novel traits for crop improvement. PLANT, CELL & ENVIRONMENT 2024. [PMID: 38436101 DOI: 10.1111/pce.14868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/12/2024] [Accepted: 02/15/2024] [Indexed: 03/05/2024]
Abstract
A relative of cultivated rice (Oryza sativa L.), weedy or red rice (Oryza spp.) is currently recognized as the dominant weed, leading to a drastic loss of yield of cultivated rice due to its highly competitive abilities like producing more tillers, panicles, and biomass with better nutrient uptake. Due to its high nutritional value, antioxidant properties (anthocyanin and proanthocyanin), and nutrient absorption ability, weedy rice is gaining immense research attentions to understand its genetic constitution to augment future breeding strategies and to develop nutrition-rich functional foods. Consequently, this review focuses on the unique gene source of weedy rice to enhance the cultivated rice for its crucial features like water use efficiency, abiotic and biotic stress tolerance, early flowering, and the red pericarp of the seed. It explores the debating issues on the origin and evolution of weedy rice, including its high diversity, signalling aspects, quantitative trait loci (QTL) mapping under stress conditions, the intricacy of the mechanism in the expression of the gene flow, and ecological challenges of nutrient removal by weedy rice. This review may create a foundation for future researchers to understand the gene flow between cultivated crops and weedy traits and support an improved approach for the applicability of several models in predicting multiomics variables.
Collapse
Affiliation(s)
- Ingudam Bhupenchandra
- ICAR-Farm Science Centre Tamenglong, ICAR Research Complex for NEH Region, Manipur Centre, Imphal, Manipur, India
| | - Sunil Kumar Chongtham
- Multi Technology Testing Centre and Vocational Training Centre, College of Horticulture, Central Agricultural University, Bermiok, Sikkim, India
| | - Ayam Gangarani Devi
- ICAR Research Complex for North Eastern Hill Region, Tripura Centre Lembucherra, Tripura, India
| | - Pranab Dutta
- School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam, Meghalaya, India
| | - Elangbam Lamalakshmi
- ICAR Research Complex for North Eastern Hill Region, Sikkim Centre, Tadong, Sikkim, India
| | - Sansuta Mohanty
- Molecular Biology and Biotechnology Department, Faculty of Agricultural Sciences, Siksha O Anusandhan University, Bhubaneswar, Odisha, India
| | - Anil K Choudhary
- Division of Crop Production, ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Anup Das
- ICAR Research Complex for North Eastern Hill Region, Lembucherra, Tripura, India
| | - Konsam Sarika
- ICAR Research Complex for North Eastern Hill Region, Manipur Centre, Imphal, Manipur, India
| | - Sumit Kumar
- Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
- Department of Plant Pathology, B.M. College of Agriculture, Khandwa, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior, Madhya Pradesh, India
| | - Sonika Yumnam
- All India Coordinated Research Project on Chickpea, Central Agricultural University, Imphal, Manipur, India
| | - Diana Sagolsem
- Multi Technology Testing Centre and Vocational Training Centre, College of Horticulture, Central Agricultural University, Bermiok, Sikkim, India
| | - Y Rupert Anand
- Multi Technology Testing Centre and Vocational Training Centre, College of Horticulture, Central Agricultural University, Bermiok, Sikkim, India
| | - Dawa Dolma Bhutia
- Multi Technology Testing Centre and Vocational Training Centre, College of Horticulture, Central Agricultural University, Bermiok, Sikkim, India
| | - M Victoria
- Multi Technology Testing Centre and Vocational Training Centre, College of Horticulture, Central Agricultural University, Bermiok, Sikkim, India
| | - S Vinodh
- Multi Technology Testing Centre and Vocational Training Centre, College of Horticulture, Central Agricultural University, Bermiok, Sikkim, India
| | - Chongtham Tania
- ICAR Research Complex for North Eastern Hill Region, Manipur Centre, Imphal, Manipur, India
| | | | - Lipa Deb
- School of Crop Protection, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University (Imphal), Umiam, Meghalaya, India
| | - Manas Ranjan Sahoo
- ICAR Research Complex for North Eastern Hill Region, Manipur Centre, Imphal, Manipur, India
| | | | - Prashant Swapnil
- Department of Botany, School of Basic Science, Central University of Punjab, Bhatinda, Punjab, India
| | - Mukesh Meena
- Laboratory of Phytopathology and Microbial Biotechnology, Department of Botany, Mohanlal Sukhadia University, Udaipur, Rajasthan, India
| |
Collapse
|
3
|
Vercellino RB, Hernández F, Pandolfo C, Ureta S, Presotto A. Agricultural weeds: the contribution of domesticated species to the origin and evolution of feral weeds. PEST MANAGEMENT SCIENCE 2023; 79:922-934. [PMID: 36507604 DOI: 10.1002/ps.7321] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/04/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Agricultural weeds descended from domesticated ancestors, directly from crops (endoferality) and/or from crop-wild hybridization (exoferality), may have evolutionary advantages by rapidly acquiring traits pre-adapted to agricultural habitats. Understanding the role of crops on the origin and evolution of agricultural weeds is essential to develop more effective weed management programs, minimize crop losses due to weeds, and accurately assess the risks of cultivated genes escaping. In this review, we first describe relevant traits of weediness: shattering, seed dormancy, branching, early flowering and rapid growth, and their role in the feralization process. Furthermore, we discuss how the design of "super-crops" can affect weed evolution. We then searched for literature documenting cases of agricultural weeds descended from well-domesticated crops, and describe six case studies of feral weeds evolved from major crops: maize, radish, rapeseed, rice, sorghum, and sunflower. Further studies on the origin and evolution of feral weeds can improve our understanding of the physiological and genetic mechanisms underpinning the adaptation to agricultural habitats and may help to develop more effective weed-control practices and breeding better crops. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Román B Vercellino
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Fernando Hernández
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Claudio Pandolfo
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Soledad Ureta
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| | - Alejandro Presotto
- Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
| |
Collapse
|
4
|
Maity A, Lamichaney A, Joshi DC, Bajwa A, Subramanian N, Walsh M, Bagavathiannan M. Seed Shattering: A Trait of Evolutionary Importance in Plants. FRONTIERS IN PLANT SCIENCE 2021; 12:657773. [PMID: 34220883 PMCID: PMC8248667 DOI: 10.3389/fpls.2021.657773] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 05/21/2021] [Indexed: 05/26/2023]
Abstract
Seed shattering refers to the natural shedding of seeds when they ripe, a phenomenon typically observed in wild and weedy plant species. The timing and extent of this phenomenon varies considerably among plant species. Seed shattering is primarily a genetically controlled trait; however, it is significantly influenced by environmental conditions, management practices and their interactions, especially in agro-ecosystems. This trait is undesirable in domesticated crops where consistent efforts have been made to minimize it through conventional and molecular breeding approaches. However, this evolutionary trait serves as an important fitness and survival mechanism for most weeds that utilize it to ensure efficient dispersal of their seeds, paving the way for persistent soil seedbank development and sustained future populations. Weeds have continuously evolved variations in seed shattering as an adaptation under changing management regimes. High seed retention is common in many cropping weeds where weed maturity coincides with crop harvest, facilitating seed dispersal through harvesting operations, though some weeds have notoriously high seed shattering before crop harvest. However, high seed retention in some of the most problematic agricultural weed species such as annual ryegrass (Lolium rigidum), wild radish (Raphanus raphanistrum), and weedy amaranths (Amaranthus spp.) provides an opportunity to implement innovative weed management approaches such as harvest weed seed control, which aims at capturing and destroying weed seeds retained at crop harvest. The integration of such management options with other practices is important to avoid the rapid evolution of high seed shattering in target weed species. Advances in genetics and molecular biology have shown promise for reducing seed shattering in important crops, which could be exploited for manipulating seed shattering in weed species. Future research should focus on developing a better understanding of various seed shattering mechanisms in plants in relation to changing climatic and management regimes.
Collapse
Affiliation(s)
- Aniruddha Maity
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, United States
- Seed Technology Division, ICAR-Indian Grassland and Fodder Research Institute, Jhansi, India
| | - Amrit Lamichaney
- Division of Crop Improvement, ICAR-Indian Institute of Pulses Research, Kanpur, India
| | - Dinesh Chandra Joshi
- Division of Crop Improvement, ICAR-Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora, India
| | - Ali Bajwa
- Weed Research Unit, New South Wales Department of Primary Industries, Wagga Wagga, NSW, Australia
| | - Nithya Subramanian
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, United States
| | - Michael Walsh
- Sydney Institute of Agriculture, The University of Sydney, Sydney, NSW, Australia
| | | |
Collapse
|
5
|
Wu DH, Gealy DR, Jia MH, Edwards JD, Lai MH, McClung AM. Phylogenetic origin and dispersal pattern of Taiwan weedy rice. PEST MANAGEMENT SCIENCE 2020; 76:1639-1651. [PMID: 31714668 DOI: 10.1002/ps.5683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 10/11/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Knowledge of the genetic diversity and spatial structure of Taiwan weedy red rice (WRR) populations, which adapted in a transplanting system, will facilitate the design of effective methods to control this weed by tracing its origins and dispersal patterns in a given region. RESULTS Taiwan WRR is genetically most similar to Taiwan indica cultivars and landraces according to genetic distance. The inbreeding coefficient of the Taiwan WRR population is greater than 0.8, which is similar to the inbred cultivars. The ancestry coefficients map suggests a dispersal pattern of long-distance and seed-mediated contamination across Taiwan, often from warmer, earlier-planted regions to cooler, later-planted regions. Parentage analysis of Taiwan WRR revealed that mostly early indica landraces and indica cultivars were present in the genetic pool; in rare cases temperate japonica was present. Based on the above results, the phylogenetic origin of most Taiwan weedy rice appears to be from hybrid progenies of old cultivated red rice accessions crossed with 'DGWG'. The inbreeding coefficient trend of the six TWR clusters suggests a temporal shift from 'old' indica landraces with red bran (high inbreeding coefficient) to modern indica varieties (low inbreeding coefficient). CONCLUSION Although there were sustained efforts to remove these old red rice accessions from paddy fields before 1945, some farmers continued to use low purity seed. This practice, along with volunteer cultivation of these old varieties in the second cropping season, apparently has facilitated the long-distance, seed-mediated contamination of rice seed, and the increase in weedy rice seed in paddy soil. © 2019 Society of Chemical Industry.
Collapse
Affiliation(s)
- Dong-Hong Wu
- Crop Science Division, Taiwan Agricultural Research Institute, Council of Agriculture, Taichung City, Taiwan
| | - David R Gealy
- Dale Bumpers National Rice Research Center, United States Department of Agriculture - Agricultural Research Service, Stuttgart, AR, USA
| | - Melissa H Jia
- Dale Bumpers National Rice Research Center, United States Department of Agriculture - Agricultural Research Service, Stuttgart, AR, USA
| | - Jeremy D Edwards
- Dale Bumpers National Rice Research Center, United States Department of Agriculture - Agricultural Research Service, Stuttgart, AR, USA
| | - Ming-Hsin Lai
- Crop Science Division, Taiwan Agricultural Research Institute, Council of Agriculture, Taichung City, Taiwan
| | - Anna M McClung
- Dale Bumpers National Rice Research Center, United States Department of Agriculture - Agricultural Research Service, Stuttgart, AR, USA
| |
Collapse
|
6
|
Mohd Hanafiah N, Mispan MS, Lim PE, Baisakh N, Cheng A. The 21st Century Agriculture: When Rice Research Draws Attention to Climate Variability and How Weedy Rice and Underutilized Grains Come in Handy. PLANTS (BASEL, SWITZERLAND) 2020; 9:E365. [PMID: 32188108 PMCID: PMC7154822 DOI: 10.3390/plants9030365] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/10/2020] [Accepted: 03/13/2020] [Indexed: 12/11/2022]
Abstract
Rice, the first crop to be fully sequenced and annotated in the mid-2000s, is an excellent model species for crop research due mainly to its relatively small genome and rich genetic diversity. The 130-million-year-old cereal came into the limelight in the 1960s when the semi-dwarfing gene sd-1, better known as the "green revolution" gene, resulted in the establishment of a high-yielding semi-dwarf variety IR8. Deemed as the miracle rice, IR8 saved millions of lives and revolutionized irrigated rice farming particularly in the tropics. The technology, however, spurred some unintended negative consequences, especially in prompting ubiquitous monoculture systems that increase agricultural vulnerability to extreme weather events and climate variability. One feasible way to incorporate resilience in modern rice varieties with narrow genetic backgrounds is by introgressing alleles from the germplasm of its weedy and wild relatives, or perhaps from the suitable underutilized species that harbor novel genes responsive to various biotic and abiotic stresses. This review reminisces the fascinating half-century journey of rice research and highlights the potential utilization of weedy rice and underutilized grains in modern breeding programs. Other possible alternatives to improve the sustainability of crop production systems in a changing climate are also discussed.
Collapse
Affiliation(s)
- Noraikim Mohd Hanafiah
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Muhamad Shakirin Mispan
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
- The Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Phaik Eem Lim
- Institute of Ocean and Earth Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Niranjan Baisakh
- School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Acga Cheng
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| |
Collapse
|
7
|
Fang J, Wan C, Wang W, Ma L, Wang X, Cheng C, Zhou J, Qiao Y, Wang X. Engineering Herbicide-Tolerance Rice Expressing an Acetohydroxyacid Synthase with a Single Amino Acid Deletion. Int J Mol Sci 2020; 21:ijms21041265. [PMID: 32070060 PMCID: PMC7072996 DOI: 10.3390/ijms21041265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/10/2020] [Accepted: 02/12/2020] [Indexed: 11/16/2022] Open
Abstract
The acetohydroxyacid synthase (AHAS) is an essential enzyme involved in branched amino acids. Several herbicides wither weeds via inhibiting AHAS activity, and the AHAS mutants show tolerance to these herbicides. However, most AHAS mutations are residue substitutions but not residue deletion. Here, residue deletion was used to engineering the AHAS gene and herbicide-tolerant rice. Molecular docking analysis predicted that the W548 of the AHAS was a residue deletion to generate herbicide tolerance. The AHAS-ΔW548 protein was generated in vitro to remove the W548 residue. Interestingly, the deletion led to the tetramer dissociation of the AHAS, while this dissociation did not reduce the activity of the AHAS. Moreover, the W548 deletion contributed to multi-family herbicides tolerance. Specially, it conferred more tolerance to sulfometuron-methyl and bispyribac-sodium than the W548L substitution. Further analysis revealed that AHAS-ΔW548 had the best performance on the sulfometuron-methyl tolerance compared to the wild-type control. Over-expression of the AHAS-ΔW548 gene into rice led to the tolerance of multiple herbicides in the transgenic line. The T-DNA insertion and the herbicide treatment did not affect the agronomic traits and yields, while more branched-chain amino acids were detected in transgenic rice seeds. Residue deletion of W548 in the AHAS could be a useful strategy for engineering herbicide tolerant rice. The increase of branched-chain amino acids might improve the umami tastes of the rice.
Collapse
Affiliation(s)
- Jun Fang
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
- Correspondence:
| | - Changzhao Wan
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
| | - Wei Wang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 99 Haike Rd, Shanghai 201210, China;
| | - Liuyin Ma
- Basic Forestry and Proteomics Research Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
| | - Xinqi Wang
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
| | - Can Cheng
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
| | - Jihua Zhou
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
| | - Yongjin Qiao
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
| | - Xiao Wang
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agricultural Sciences, 1000 Jingqi Rd, Shanghai 201403, China; (C.W.); (X.W.); (C.C.); (J.Z.); (Y.Q.)
| |
Collapse
|
8
|
De Leon TB, Karn E, Al‐Khatib K, Espino L, Blank T, Andaya CB, Andaya VC, Brim‐DeForest W. Genetic variation and possible origins of weedy rice found in California. Ecol Evol 2019; 9:5835-5848. [PMID: 31161002 PMCID: PMC6540678 DOI: 10.1002/ece3.5167] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 03/04/2019] [Accepted: 03/18/2019] [Indexed: 12/12/2022] Open
Abstract
Control of weeds in cultivated crops is a pivotal component in successful crop production allowing higher yield and higher quality. In rice-growing regions worldwide, weedy rice (Oryza sativa f. spontanea Rosh.) is a weed related to cultivated rice which infests rice fields. With populations across the globe evolving a suite of phenotypic traits characteristic of weeds and of cultivated rice, varying hypotheses exist on the origin of weedy rice. Here, we investigated the genetic diversity and possible origin of weedy rice in California using 98 simple sequence repeat (SSR) markers and an Rc gene-specific marker. By employing phylogenetic clustering analysis, we show that four to five genetically distinct biotypes of weedy rice exist in California. Analysis of population structure and genetic distance among individuals reveals diverse evolutionary origins of California weedy rice biotypes, with ancestry derived from indica, aus, and japonica cultivated rice as well as possible contributions from weedy rice from the southern United States and wild rice. Because this diverse parentage primarily consists of weedy, wild, and cultivated rice not found in California, most existing weedy rice biotypes likely originated outside California.
Collapse
Affiliation(s)
- Teresa B. De Leon
- Department of Plant SciencesUniversity of California, DavisDavisCalifornia
- Rice Experiment StationCalifornia Cooperative Rice Research Foundation, Inc.BiggsCalifornia
| | - Elizabeth Karn
- Cooperative Extension Sutter‐Yuba CountiesUniversity of California Division of Agricultural and Natural Resources (UC ANR)Yuba CityCalifornia
| | - Kassim Al‐Khatib
- Department of Plant SciencesUniversity of California, DavisDavisCalifornia
| | - Luis Espino
- Cooperative Extension Colusa CountyUniversity of California Division of Agricultural and Natural Resources (UC ANR)ColusaCalifornia
| | - Timothy Blank
- California Crop Improvement AssociationUniversity of California, DavisDavisCalifornia
| | - Cynthia B. Andaya
- Rice Experiment StationCalifornia Cooperative Rice Research Foundation, Inc.BiggsCalifornia
| | - Virgilio C. Andaya
- Rice Experiment StationCalifornia Cooperative Rice Research Foundation, Inc.BiggsCalifornia
| | - Whitney Brim‐DeForest
- Cooperative Extension Sutter‐Yuba CountiesUniversity of California Division of Agricultural and Natural Resources (UC ANR)Yuba CityCalifornia
| |
Collapse
|
9
|
Vigueira CC, Qi X, Song B, Li L, Caicedo AL, Jia Y, Olsen KM. Call of the wild rice: Oryza rufipogon shapes weedy rice evolution in Southeast Asia. Evol Appl 2019; 12:93-104. [PMID: 30622638 PMCID: PMC6304679 DOI: 10.1111/eva.12581] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 11/21/2017] [Indexed: 02/03/2023] Open
Abstract
Agricultural weeds serve as productive models for studying the genetic basis of rapid adaptation, with weed-adaptive traits potentially evolving multiple times independently in geographically distinct but environmentally similar agroecosystems. Weedy relatives of domesticated crops can be especially interesting systems because of the potential for weed-adaptive alleles to originate through multiple mechanisms, including introgression from cultivated and/or wild relatives, standing genetic variation, and de novo mutations. Weedy rice populations have evolved multiple times through dedomestication from cultivated rice. Much of the genomic work to date in weedy rice has focused on populations that exist outside the range of the wild crop progenitor. In this study, we use genome-wide SNPs generated through genotyping-by-sequencing to compare the evolution of weedy rice in regions outside the range of wild rice (North America, South Korea) and populations in Southeast Asia, where wild rice populations are present. We find evidence for adaptive introgression of wild rice alleles into weedy rice populations in Southeast Asia, with the relative contributions of wild and cultivated rice alleles varying across the genome. In addition, gene regions underlying several weed-adaptive traits are dominated by genomic contributions from wild rice. Genome-wide nucleotide diversity is also much higher in Southeast Asian weeds than in North American and South Korean weeds. Besides reflecting introgression from wild rice, this difference in diversity likely reflects genetic contributions from diverse cultivated landraces that may have served as the progenitors of these weedy populations. These important differences in weedy rice evolution in regions with and without wild rice could inform region-specific management strategies for weed control.
Collapse
Affiliation(s)
| | - Xinshuai Qi
- Department of Ecology & Evolutionary BiologyUniversity of ArizonaTucsonAZUSA
| | - Beng‐Kah Song
- School of ScienceMonash University MalaysiaSelangorMalaysia
- Genomics FacilityMonash University MalaysiaSelangorMalaysia
| | - Lin‐Feng Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringDepartment of Ecology and Evolutionary BiologyFudan UniversityShanghaiChina
| | - Ana L. Caicedo
- Department of BiologyUniversity of MassachusettsAmherstMAUSA
| | - Yulin Jia
- Dale Bumpers National Rice Research CenterUSDA‐ARSStuttgartARUSA
| | | |
Collapse
|
10
|
Ravet K, Patterson EL, Krähmer H, Hamouzová K, Fan L, Jasieniuk M, Lawton-Rauh A, Malone JM, McElroy JS, Merotto A, Westra P, Preston C, Vila-Aiub MM, Busi R, Tranel PJ, Reinhardt C, Saski C, Beffa R, Neve P, Gaines TA. The power and potential of genomics in weed biology and management. PEST MANAGEMENT SCIENCE 2018; 74:2216-2225. [PMID: 29687580 DOI: 10.1002/ps.5048] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/18/2018] [Accepted: 04/19/2018] [Indexed: 05/11/2023]
Abstract
There have been previous calls for, and efforts focused on, realizing the power and potential of weed genomics for better understanding of weeds. Sustained advances in genome sequencing and assembly technologies now make it possible for individual research groups to generate reference genomes for multiple weed species at reasonable costs. Here, we present the outcomes from several meetings, discussions, and workshops focused on establishing an International Weed Genomics Consortium (IWGC) for a coordinated international effort in weed genomics. We review the 'state of the art' in genomics and weed genomics, including technologies, applications, and on-going weed genome projects. We also report the outcomes from a workshop and a global survey of the weed science community to identify priority species, key biological questions, and weed management applications that can be addressed through greater availability of, and access to, genomic resources. Major focus areas include the evolution of herbicide resistance and weedy traits, the development of molecular diagnostics, and the identification of novel targets and approaches for weed management. There is increasing interest in, and need for, weed genomics, and the establishment of the IWGC will provide the necessary global platform for communication and coordination of weed genomics research. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Karl Ravet
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Eric L Patterson
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | | | - Kateřina Hamouzová
- Department of Agroecology and Biometeorology, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Longjiang Fan
- Institute of Crop Science & Institute of Bioinformatics, Zhejiang University, Hangzhou, China
| | - Marie Jasieniuk
- Department of Plant Sciences, University of California-Davis, Davis, CA, USA
| | - Amy Lawton-Rauh
- Department of Genetics and Biochemistry, 316 Biosystems Research Complex, Clemson University, Clemson, SC, USA
| | - Jenna M Malone
- School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia
| | - J Scott McElroy
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL, USA
| | - Aldo Merotto
- Department of Crop Sciences, Agricultural School, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Philip Westra
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Christopher Preston
- School of Agriculture, Food & Wine, University of Adelaide, Glen Osmond, Australia
| | - Martin M Vila-Aiub
- Facultad de Agronomía, Departamento de Ecología, IFEVA-CONICET, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Roberto Busi
- Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Crawley, Australia
| | - Patrick J Tranel
- Department of Crop Sciences, University of Illinois, Urbana, IL, USA
| | - Carl Reinhardt
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | - Christopher Saski
- Clemson University Genomics and Computational Biology Laboratory, Clemson University, Clemson, SC, USA
| | - Roland Beffa
- Bayer AG, Industriepark Hoechst, Frankfurt am Main, Germany
| | - Paul Neve
- Biointeractions & Crop Protection Department, Rothamsted Research, West Common, Harpenden, Hertfordshire, UK
| | - Todd A Gaines
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| |
Collapse
|
11
|
Chai C, Shankar R, Jain M, Subudhi PK. Genome-wide discovery of DNA polymorphisms by whole genome sequencing differentiates weedy and cultivated rice. Sci Rep 2018; 8:14218. [PMID: 30242197 PMCID: PMC6155081 DOI: 10.1038/s41598-018-32513-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 09/10/2018] [Indexed: 12/13/2022] Open
Abstract
Analyzing the genome level DNA polymorphisms between weedy and cultivated rice is crucial to elucidate the molecular basis of weedy and agronomic traits, which in turn can enhance our ability to control weedy rice and its utilization for rice improvement. Here, we presented the genome-wide genetic variations between a weedy rice accession PSRR-1 and two cultivated rice accessions, Bengal and Nona Bokra, belonging to japonica and indica subspecies, respectively. The total number of SNPs and InDels in PSRR/Bengal was similar to that of Nona Bokra/Bengal, but was three times greater than that of PSRR/Nona Bokra. There were 11546 large-effect SNPs/InDels affecting 5673 genes, which most likely differentiated weedy rice from cultivated rice. These large effect DNA polymorphisms were mostly resulted in stop codon gain and least by start codon loss. Analysis of the molecular functions and biological processes of weedy rice specific SNPs/InDels indicated that most of these genes were involved in protein modification/phosphorylation, protein kinase activity, and protein/nucleotide binding. By integrating previous QTL mapping results with the DNA polymorphisms data, the candidate genes for seed dormancy and seed shattering were narrowed down. The genomic resource generated in this study will facilitate discovery of functional variants for weedy and agronomic traits.
Collapse
Affiliation(s)
- Chenglin Chai
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
- Noble Research Institute, LLC, 2510 Sam Noble Parkway, Ardmore, OK, 73401, USA
| | - Rama Shankar
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Mukesh Jain
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
| | - Prasanta K Subudhi
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA.
| |
Collapse
|
12
|
Kanapeckas KL, Tseng TM, Vigueira CC, Ortiz A, Bridges WC, Burgos NR, Fischer AJ, Lawton-Rauh A. Contrasting patterns of variation in weedy traits and unique crop features in divergent populations of US weedy rice (Oryza sativa sp.) in Arkansas and California. PEST MANAGEMENT SCIENCE 2018; 74:1404-1415. [PMID: 29205860 DOI: 10.1002/ps.4820] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 11/29/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Weed evolution from crops involves changes in key traits, but it is unclear how genetic and phenotypic variation contribute to weed diversification and productivity. Weedy rice is a conspecific weed of rice (Oryza sativa) worldwide. We used principal component analysis and hierarchical clustering to understand how morphologically and evolutionarily distinct US weedy rice populations persist in rice fields in different locations under contrasting management regimes. Further, we used a representative subset of 15 sequence-tagged site fragments of expressed genes from global Oryza to assess genome-wide sequence variation among populations. RESULTS Crop hull color and crop-overlapping maturity dates plus awns, seed (panicle) shattering (> 50%), pigmented pericarp and stature variation (30.2% of total phenotypic variance) characterize genetically less diverse California weedy rice. By contrast, wild-like hull color, seed shattering (> 50%) and stature differences (55.8% of total phenotypic variance) typify genetically diverse weedy rice ecotypes in Arkansas. CONCLUSION Recent de-domestication of weedy species - such as in California weedy rice - can involve trait combinations indistinguishable from the crop. This underscores the need for strict seed certification with genetic monitoring and proactive field inspection to prevent proliferation of weedy plant types. In established populations, tillage practice may affect weed diversity and persistence over time. © 2017 Society of Chemical Industry.
Collapse
Affiliation(s)
- Kimberly L Kanapeckas
- South Carolina Department of Natural Resources Marine Resources Research Institute and College of Charleston, Hollings Marine Laboratory, Charleston, SC, USA
| | - Te-Ming Tseng
- Department of Plant and Soil Sciences, Mississippi State University, MS, USA
| | | | - Aida Ortiz
- Facultad de Agronomía, Universidad Central de Venezuela Maracay, Aragua, Venezuela
| | - William C Bridges
- Department of Mathematical Sciences, Clemson University, Clemson, SC, USA
| | - Nilda R Burgos
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
| | - Albert J Fischer
- Department of Plant Sciences, University of California, Davis, CA, USA
| | - Amy Lawton-Rauh
- Department of Genetics and Biochemistry, Clemson University, Clemson, SC, USA
| |
Collapse
|
13
|
Piao Z, Wang W, Wei Y, Zonta F, Wan C, Bai J, Wu S, Wang X, Fang J. Characterization of an acetohydroxy acid synthase mutant conferring tolerance to imidazolinone herbicides in rice (Oryza sativa). PLANTA 2018; 247:693-703. [PMID: 29170911 DOI: 10.1007/s00425-017-2817-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/18/2017] [Indexed: 06/07/2023]
Abstract
The acetohydroxy acid synthase S627N mutation confers herbicide tolerance in rice, and the rice variety containing this mutation produces good yields. This variety is commercially viable at Shanghai and Jiangsu regions in China. Weedy rice is a type of rice that produces lower yields and poorer quality grains than cultivated rice. It plagues commercial rice fields in many countries. One strategy to control its proliferation is to develop rice varieties that are tolerant to specific herbicides. Acetohydroxy acid synthase (AHAS) mutations have been found to confer herbicide tolerance to rice. Here, we identified a single mutation (S627N) in AHAS from an indica rice variety that conferred tolerance against imidazolinone herbicides, including imazethapyr and imazamox. A japonica rice variety (JD164) was developed to obtain herbicide tolerance by introducing the mutated indica ahas gene. Imidazolinone application was sufficient to efficiently control weedy rice in the JD164 field. Although the imazethapyr treatment caused dwarfing in the JD164 plants, it did not significantly reduce yields. To determine whether the decrease of the ahas mRNA expression caused the dwarfism of JD164 after imazethapyr application, we detected the ahas mRNA level in plants. The abundance of the ahas mRNA in JD164 increased after imidazolinone application, thus excluding the mRNA expression level as a possible cause of dwarfism. Activity assays showed that the mutated AHAS was tolerant to imidazolinone but the catalytic efficiency of the mutated AHAS decreased in its presence. Moreover, the activity of the mutated AHAS decreased more in the presence of imazethapyr than in the presence of imazamox. We observed no difference in the AHAS secondary structures, but homology modeling suggested that the S627N mutation enabled the substrate to access the active site channel in AHAS, resulting in imidazolinone tolerance. Our work combined herbicides with a rice variety to control weedy rice and showed the mechanism of herbicide tolerance in this rice variety.
Collapse
Affiliation(s)
- Zhongze Piao
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agriculture Sciences, 1000 Jingqi Rd, Shanghai, 201403, China
| | - Wei Wang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 99 Haike Rd, Shanghai, 201210, China
| | - Yinan Wei
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Francesco Zonta
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, 99 Haike Rd, Shanghai, 201210, China
- Department of Biomedical Sciences, Institute of Cell Biology and Neurobiology, Italian National Research Council, 00015, Monterotondo, RM, Italy
| | - Changzhao Wan
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agriculture Sciences, 1000 Jingqi Rd, Shanghai, 201403, China
| | - Jianjiang Bai
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agriculture Sciences, 1000 Jingqi Rd, Shanghai, 201403, China
| | - Shujun Wu
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agriculture Sciences, 1000 Jingqi Rd, Shanghai, 201403, China
| | - Xinqi Wang
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agriculture Sciences, 1000 Jingqi Rd, Shanghai, 201403, China
| | - Jun Fang
- Crop Breeding and Cultivating Institute, Shanghai Academy of Agriculture Sciences, 1000 Jingqi Rd, Shanghai, 201403, China.
| |
Collapse
|
14
|
Evidence for mid-Holocene rice domestication in the Americas. Nat Ecol Evol 2017; 1:1693-1698. [PMID: 28993622 DOI: 10.1038/s41559-017-0322-4] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 08/22/2017] [Indexed: 11/09/2022]
Abstract
The development of agriculture is one of humankind's most pivotal achievements. Questions about plant domestication and the origins of agriculture have engaged scholars for well over a century, with implications for understanding its legacy on global subsistence strategies, plant distribution, population health and the global methane budget. Rice is one of the most important crops to be domesticated globally, with both Asia (Oryza sativa L.) and Africa (Oryza glaberrima Steud.) discussed as primary centres of domestication. However, until now the pre-Columbian domestication of rice in the Americas has not been documented. Here we document the domestication of Oryza sp. wild rice by the mid-Holocene residents of the Monte Castelo shell mound starting at approximately 4,000 cal. yr BP, evidenced by increasingly larger rice husk phytoliths. Our data provide evidence for the domestication of wild rice in a region of the Amazon that was also probably the cradle of domestication of other major crops such as cassava (Manihot esculenta), peanut (Arachis hypogaea) and chilli pepper (Capsicum sp.). These results underline the role of wetlands as prime habitats for plant domestication worldwide.
Collapse
|
15
|
Comparative Mapping of Seed Dormancy Loci Between Tropical and Temperate Ecotypes of Weedy Rice ( Oryza sativa L.). G3-GENES GENOMES GENETICS 2017; 7:2605-2614. [PMID: 28592557 PMCID: PMC5555466 DOI: 10.1534/g3.117.040451] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Genotypic variation at multiple loci for seed dormancy (SD) contributes to plant adaptation to diverse ecosystems. Weedy rice (Oryza sativa) was used as a model to address the similarity of SD genes between distinct ecotypes. A total of 12 quantitative trait loci (QTL) for SD were identified in one primary and two advanced backcross (BC) populations derived from a temperate ecotype of weedy rice (34.3°N Lat.). Nine (75%) of the 12 loci were mapped to the same positions as those identified from a tropical ecotype of weedy rice (7.1°N Lat.). The high similarity suggested that the majority of SD genes were conserved during the ecotype differentiation. These common loci are largely those collocated/linked with the awn, hull color, pericarp color, or plant height loci. Phenotypic correlations observed in the populations support the notion that indirect selections for the wild-type morphological characteristics, together with direct selections for germination time, were major factors influencing allelic distributions of SD genes across ecotypes. Indirect selections for crop-mimic traits (e.g., plant height and flowering time) could also alter allelic frequencies for some SD genes in agroecosystems. In addition, 3 of the 12 loci were collocated with segregation distortion loci, indicating that some gametophyte development genes could also influence the genetic equilibria of SD loci in hybrid populations. The SD genes with a major effect on germination across ecotypes could be used as silencing targets to develop transgene mitigation (TM) strategies to reduce the risk of gene flow from genetically modified crops into weed/wild relatives.
Collapse
|
16
|
Trtikova M, Lohn A, Binimelis R, Chapela I, Oehen B, Zemp N, Widmer A, Hilbeck A. Teosinte in Europe - Searching for the Origin of a Novel Weed. Sci Rep 2017; 7:1560. [PMID: 28484216 PMCID: PMC5431553 DOI: 10.1038/s41598-017-01478-w] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 03/30/2017] [Indexed: 11/09/2022] Open
Abstract
A novel weed has recently emerged, causing serious agronomic damage in one of the most important maize-growing regions of Western Europe, the Northern Provinces of Spain. The weed has morphological similarities to a wild relative of maize and has generally been referred to as teosinte. However, the identity, origin or genetic composition of 'Spanish teosinte' was unknown. Here, we present a genome-wide analysis of single-nucleotide polymorphism (SNP) data for Spanish teosinte, sympatric populations of cultivated maize and samples of reference teosinte taxa. Our data are complemented with previously published SNP datasets of cultivated maize and two Mexican teosinte subspecies. Our analyses reveal that Spanish teosinte does not group with any of the currently recognized teosinte taxa. Based on Bayesian clustering analysis and hybridization simulations, we infer that Spanish teosinte is of admixed origin, most likely involving Zea mays ssp. mexicana as one parental taxon, and an unidentified cultivated maize variety as the other. Analyses of plants grown from seeds collected in Spanish maize fields and experimental crosses under controlled conditions reveal that hybridization does occur between Spanish teosinte and cultivated maize in Spain, and that current hybridization is asymmetric, favouring the introgression of Spanish teosinte into cultivated maize, rather than vice versa.
Collapse
Affiliation(s)
- Miluse Trtikova
- ETH Zurich, Institute of Integrative Biology (IBZ), Universitätstrasse 16, 8092, Zurich, Switzerland.
| | - Andre Lohn
- ETH Zurich, Institute of Integrative Biology (IBZ), Universitätstrasse 16, 8092, Zurich, Switzerland
| | - Rosa Binimelis
- Agroecology and Food Systems Chair, Universitat de Vic - Universitat Central de Catalunya, c/de la Laura 13, 08500, Vic, Spain
| | - Ignacio Chapela
- University of California Berkeley, Department of Environmental Science, Policy and Management, 108 Hilgard Hall, 94720, Berkeley, USA
| | - Bernadette Oehen
- ETH Zurich, Institute of Integrative Biology (IBZ), Universitätstrasse 16, 8092, Zurich, Switzerland
| | - Niklaus Zemp
- ETH Zurich, Genetic Diversity Centre (GDC), Universitätstrasse 16, 8092, Zurich, Switzerland
| | - Alex Widmer
- ETH Zurich, Institute of Integrative Biology (IBZ), Universitätstrasse 16, 8092, Zurich, Switzerland
| | - Angelika Hilbeck
- ETH Zurich, Institute of Integrative Biology (IBZ), Universitätstrasse 16, 8092, Zurich, Switzerland
| |
Collapse
|
17
|
|