1
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Li X, Lowey D, Lessard J, Caicedo AL. Comparative histology of abscission zones reveals the extent of convergence and divergence in seed shattering in weedy and cultivated rice. JOURNAL OF EXPERIMENTAL BOTANY 2024:erae221. [PMID: 38972665 DOI: 10.1093/jxb/erae221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 05/29/2024] [Indexed: 07/09/2024]
Abstract
The modification of seed shattering has been a recurring theme in rice evolution. The wild ancestor of cultivated rice disperses its seeds, but reduced shattering was selected during multiple domestication events to facilitate harvesting. Conversely, selection for increased shattering occurred during the evolution of weedy rice, a weed invading cultivated rice fields that has originated multiple times from domesticated ancestors. Shattering requires formation of a tissue known as the abscission zone (AZ), but how the AZ has been modified throughout rice evolution is unclear. We quantitatively characterized the AZ characteristics of relative length, discontinuity, and intensity in 86 cultivated and weedy rice accessions. We reconstructed AZ evolutionary trajectories and determined the degree of convergence among different cultivated varieties and among independent weedy rice populations. AZ relative length emerged as the best feature to distinguish high and low shattering rice. Cultivated varieties differed in average AZ morphology, revealing lack of convergence in how shattering reduction was achieved during domestication. In contrast, weedy rice populations typically converged on complete AZs, irrespective of origin. By examining AZ population-level morphology, our study reveals its evolutionary plasticity, and suggests that the genetic potential to modify the ecologically and agronomically important trait of shattering is plentiful in rice lineages.
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Affiliation(s)
- Xiang Li
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Daniel Lowey
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Jessica Lessard
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Ana L Caicedo
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA
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2
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Zhang Z, Wang X, Zang J, Lee D, Zhu Q, Chen L. Phenotypic Characteristics and Occurrence Basis of Leaf Necrotic Spots in Response of Weedy Rice to Imazethapyr. PLANTS (BASEL, SWITZERLAND) 2024; 13:1218. [PMID: 38732432 PMCID: PMC11085574 DOI: 10.3390/plants13091218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024]
Abstract
Weedy rice is the most challenging weed species to remove in rice production. We found a novel phenotype of seedling leaves which rapidly generates necrotic spots in response to imidazolinone herbicides in weedy rice, but its influencing factors and formation basis are still unknown. In this study, we used the leaf necrotic spot-producing type of weedy rice as the material. First, leaf necrotic spots were defined as physiological and vacuole-mediated cell necrosis by microscopic examination. The imazethapyr concentration was positively correlated with the degree of necrotic spots occurring, while the action site was in accordance with necrosis using herbicide stability tests combined with fluorescence parameters. Furthermore, transcriptome analysis revealed significant differences in the gene expression of endoplasmic reticulum stress and the lipid metabolism membrane structure damage pathway during necrosis, as confirmed by transmission electron microscopy. The light-temperature test also showed that high temperature and intense light could promote the appearance of necrotic spots. These experimental results are helpful in clarifying the process and basis of imazethapyr in inducing the rapid generation of necrotic spots in rice leaves and providing new insight into understanding the mechanism of response to imidazolinone herbicides and the control of weedy rice.
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Affiliation(s)
- Zeyu Zhang
- Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China; (Z.Z.); (D.L.); (Q.Z.)
| | - Xianyu Wang
- Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China; (Z.Z.); (D.L.); (Q.Z.)
| | - Jianing Zang
- Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China; (Z.Z.); (D.L.); (Q.Z.)
| | - Dongsun Lee
- Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China; (Z.Z.); (D.L.); (Q.Z.)
- The Key Laboratory for Crop Production and Smart Agriculture of Yunnan Province, Yunnan Agricultural University, Kunming 650201, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - Qian Zhu
- Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China; (Z.Z.); (D.L.); (Q.Z.)
- The Key Laboratory for Crop Production and Smart Agriculture of Yunnan Province, Yunnan Agricultural University, Kunming 650201, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - Lijuan Chen
- Rice Research Institute, Yunnan Agricultural University, Kunming 650201, China; (Z.Z.); (D.L.); (Q.Z.)
- The Key Laboratory for Crop Production and Smart Agriculture of Yunnan Province, Yunnan Agricultural University, Kunming 650201, China
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
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3
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Chen K, Yang H, Wu D, Peng Y, Lian L, Bai L, Wang L. Weed biology and management in the multi-omics era: Progress and perspectives. PLANT COMMUNICATIONS 2024; 5:100816. [PMID: 38219012 PMCID: PMC11009161 DOI: 10.1016/j.xplc.2024.100816] [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: 09/13/2023] [Revised: 11/20/2023] [Accepted: 01/08/2024] [Indexed: 01/15/2024]
Abstract
Weeds pose a significant threat to crop production, resulting in substantial yield reduction. In addition, they possess robust weedy traits that enable them to survive in extreme environments and evade human control. In recent years, the application of multi-omics biotechnologies has helped to reveal the molecular mechanisms underlying these weedy traits. In this review, we systematically describe diverse applications of multi-omics platforms for characterizing key aspects of weed biology, including the origins of weed species, weed classification, and the underlying genetic and molecular bases of important weedy traits such as crop-weed interactions, adaptability to different environments, photoperiodic flowering responses, and herbicide resistance. In addition, we discuss limitations to the application of multi-omics techniques in weed science, particularly compared with their extensive use in model plants and crops. In this regard, we provide a forward-looking perspective on the future application of multi-omics technologies to weed science research. These powerful tools hold great promise for comprehensively and efficiently unraveling the intricate molecular genetic mechanisms that underlie weedy traits. The resulting advances will facilitate the development of sustainable and highly effective weed management strategies, promoting greener practices in agriculture.
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Affiliation(s)
- Ke Chen
- Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley, Ministry of Agriculture and Rural Affairs, Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Longping Branch, College of Biology, Hunan University, Changsha 410125, China; Hunan Weed Science Key Laboratory, Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Haona Yang
- State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Weed Science Key Laboratory, Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Di Wu
- State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Yajun Peng
- State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Hunan Weed Science Key Laboratory, Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Lei Lian
- Qingdao Kingagroot Compounds Co. Ltd, Qingdao 266000, China
| | - Lianyang Bai
- Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley, Ministry of Agriculture and Rural Affairs, Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Longping Branch, College of Biology, Hunan University, Changsha 410125, China; Huangpu Research Institute of Longping Agricultural Science and Technology, Guangzhou 510715, China; Hunan Weed Science Key Laboratory, Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China.
| | - Lifeng Wang
- Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley, Ministry of Agriculture and Rural Affairs, Hunan Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China; State Key Laboratory of Hybrid Rice, Hunan Academy of Agricultural Sciences, Changsha 410125, China; Longping Branch, College of Biology, Hunan University, Changsha 410125, China; Huangpu Research Institute of Longping Agricultural Science and Technology, Guangzhou 510715, China; Hunan Weed Science Key Laboratory, Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China.
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4
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Li LF, Pusadee T, Wedger MJ, Li YL, Li MR, Lau YL, Yap SJ, Jamjod S, Rerkasem B, Hao Y, Song BK, Olsen KM. Porous borders at the wild-crop interface promote weed adaptation in Southeast Asia. Nat Commun 2024; 15:1182. [PMID: 38383554 PMCID: PMC10881511 DOI: 10.1038/s41467-024-45447-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 01/24/2024] [Indexed: 02/23/2024] Open
Abstract
High reproductive compatibility between crops and their wild relatives can provide benefits for crop breeding but also poses risks for agricultural weed evolution. Weedy rice is a feral relative of rice that infests paddies and causes severe crop losses worldwide. In regions of tropical Asia where the wild progenitor of rice occurs, weedy rice could be influenced by hybridization with the wild species. Genomic analysis of this phenomenon has been very limited. Here we use whole genome sequence analyses of 217 wild, weedy and cultivated rice samples to show that wild rice hybridization has contributed substantially to the evolution of Southeast Asian weedy rice, with some strains acquiring weed-adaptive traits through introgression from the wild progenitor. Our study highlights how adaptive introgression from wild species can contribute to agricultural weed evolution, and it provides a case study of parallel evolution of weediness in independently-evolved strains of a weedy crop relative.
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Affiliation(s)
- Lin-Feng Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai, 200438, China
- Department of Biology, Washington University in St. Louis, St. Louis, MO, 63105, USA
| | - Tonapha Pusadee
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Marshall J Wedger
- Department of Biology, Washington University in St. Louis, St. Louis, MO, 63105, USA
| | - Ya-Ling Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ming-Rui Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yee-Ling Lau
- Department of Parasitology, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia
| | | | - Sansanee Jamjod
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Benjavan Rerkasem
- Plant Genetic Resources and Nutrition Laboratory, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Yan Hao
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Beng-Kah Song
- School of Sciences, Monash University Malaysia, 47500, Bandar Sunway, Selangor, Malaysia.
| | - Kenneth M Olsen
- Department of Biology, Washington University in St. Louis, St. Louis, MO, 63105, USA.
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5
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Westbrook AS, DiTommaso A. Hybridization in agricultural weeds: A review from ecological, evolutionary, and management perspectives. AMERICAN JOURNAL OF BOTANY 2023; 110:e16258. [PMID: 38031455 DOI: 10.1002/ajb2.16258] [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: 08/02/2023] [Revised: 10/22/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023]
Abstract
Agricultural weeds frequently hybridize with each other or with related crop species. Some hybrid weeds exhibit heterosis (hybrid vigor), which may be stabilized through mechanisms like genome duplication or vegetative reproduction. Even when heterosis is not stabilized, hybridization events diversify weed gene pools and often enable adaptive introgression. Consequently, hybridization may promote weed evolution and exacerbate weed-crop competition. However, hybridization does not always increase weediness. Even when viable and fertile, hybrid weeds sometimes prove unsuccessful in crop fields. This review provides an overview of weed hybridization and its management implications. We describe intrinsic and extrinsic factors that influence hybrid fitness in agroecosystems. We also survey the rapidly growing literature on crop-weed hybridization and the link between hybridization and invasiveness. These topics are increasingly relevant in this era of genetic tools for crop improvement, intensive and simplified cropping systems, and globalized trade. The review concludes with suggested research priorities, including hybridization in the context of climate change, plant-insect interactions, and redesigned weed management programs. From a weed management perspective, hybridization is one of many reasons that researchers and land managers must diversify their weed control toolkits.
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Affiliation(s)
- Anna S Westbrook
- Section of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
| | - Antonio DiTommaso
- Section of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, NY, 14853, USA
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6
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Li X, Zhang S, Lowey D, Hissam C, Clevenger J, Perera S, Jia Y, Caicedo AL. A derived weedy rice × ancestral cultivar cross identifies evolutionarily relevant weediness QTLs. Mol Ecol 2023; 32:5971-5985. [PMID: 37861465 DOI: 10.1111/mec.17172] [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: 05/02/2023] [Revised: 09/02/2023] [Accepted: 10/06/2023] [Indexed: 10/21/2023]
Abstract
Weedy rice (Oryza spp.) is a weedy relative of the cultivated rice that competes with the crop and causes significant production loss. The BHA (blackhull awned) US weedy rice group has evolved from aus cultivated rice and differs from its ancestors in several important weediness traits, including flowering time, plant height and seed shattering. Prior attempts to determine the genetic basis of weediness traits in plants using linkage mapping approaches have not often considered weed origins. However, the timing of divergence between crossed parents can affect the detection of quantitative trait loci (QTL) relevant to the evolution of weediness. Here, we used a QTL-seq approach that combines bulked segregant analysis and high-throughput whole genome resequencing to map the three important weediness traits in an F2 population derived from a cross between BHA weedy rice with an ancestral aus cultivar. We compared these QTLs with those previously detected in a cross of BHA with a more distantly related crop, indica. We identified multiple QTLs that overlapped with regions under selection during the evolution of weedy BHA rice and some candidate genes possibly underlying the evolution weediness traits in BHA. We showed that QTLs detected with ancestor-descendant crosses are more likely to be involved in the evolution of weediness traits than those detected from crosses of more diverged taxa.
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Affiliation(s)
- Xiang Li
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Shulin Zhang
- College of Biology and Food Engineering, Innovation and Practice Base for Postdoctors, Anyang Institute of Technology, Anyang, China
| | - Daniel Lowey
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Carter Hissam
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Josh Clevenger
- HudsonAlpha Institute of Biotechnology, Huntsville, Alabama, USA
| | - Sherin Perera
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Yulin Jia
- United States Department of Agriculture-Agricultural Research Service, Dale Bumpers National Rice Research Center, Stuttgart, Arkansas, USA
| | - Ana L Caicedo
- Plant Biology Graduate Program and Department of Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA
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7
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Huang Y, Wu D, Huang Z, Li X, Merotto A, Bai L, Fan L. Weed genomics: yielding insights into the genetics of weedy traits for crop improvement. ABIOTECH 2023; 4:20-30. [PMID: 37220539 PMCID: PMC10199979 DOI: 10.1007/s42994-022-00090-5] [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: 10/27/2022] [Accepted: 12/06/2022] [Indexed: 05/25/2023]
Abstract
Weeds cause tremendous economic and ecological damage worldwide. The number of genomes established for weed species has sharply increased during the recent decade, with some 26 weed species having been sequenced and de novo genomes assembled. These genomes range from 270 Mb (Barbarea vulgaris) to almost 4.4 Gb (Aegilops tauschii). Importantly, chromosome-level assemblies are now available for 17 of these 26 species, and genomic investigations on weed populations have been conducted in at least 12 species. The resulting genomic data have greatly facilitated studies of weed management and biology, especially origin and evolution. Available weed genomes have indeed revealed valuable weed-derived genetic materials for crop improvement. In this review, we summarize the recent progress made in weed genomics and provide a perspective for further exploitation in this emerging field.
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Affiliation(s)
- Yujie Huang
- Institute of Crop Science and Institute of Bioinformatics, Zhejiang University, Hangzhou, 310058 China
| | - Dongya Wu
- Institute of Crop Science and Institute of Bioinformatics, Zhejiang University, Hangzhou, 310058 China
| | - Zhaofeng Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Xiangyu Li
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193 China
| | - Aldo Merotto
- Department of Crop Sciences, Agricultural School Federal University of Rio Grande do Sul, Porto Alegre, 91540-000 Brazil
| | - Lianyang Bai
- Hunan Weed Science Key Laboratory, Hunan Academy of Agriculture Sciences, Changshang, 410125 China
| | - Longjiang Fan
- Institute of Crop Science and Institute of Bioinformatics, Zhejiang University, Hangzhou, 310058 China
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8
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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.
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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
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9
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Fukuda M, Imaizumi T, Koarai A. Seed germination responses to temperature and water availability in weedy rice. PEST MANAGEMENT SCIENCE 2023; 79:870-880. [PMID: 36308725 DOI: 10.1002/ps.7256] [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: 02/25/2022] [Revised: 07/29/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Weedy rice is one of the main agricultural weeds infesting transplanted and direct-seeded rice cultures across Japan. However, the environmental factors that facilitate its proliferation are largely unknown. This study investigated the effects of temperature and water availability on seed germination of Japanese weedy and cultivated rice strains differing in degree of seed dormancy and after-ripening. This information could help predict weedy rice infestation and design efficacious control measures. RESULTS The germination responses of weedy rice to temperature and water availability varied among strains and after-ripening duration. The germination rate varied inversely with the degree of dormancy, increased with water availability, and fluctuated between low and high temperatures. The shallow-dormant tropical japonica-derived strawhull weedy rice (TRJ) germinated at 10 °C unlike the temperate japonica-derived weedy rice strains, namely, the intermediate-dormant blackhull (BH) and the deep-dormant strawhull (SH). Seeds of all plant strains germinated below the permanent wilting point of clay loam soil, but the germination rates were higher for TRJ and BH than for cultivated rice. SH germination was more synchronous with rice than the other weedy rice strains. CONCLUSION This study has confirmed the overall robustness of germination cold tolerance at 10 °C in TRJ, high germinability at low-water availability and high temperature in TRJ and BH, and relatively more synchronous germination between SH and cultivated rice in seeds grown in different years. These observed characteristics are considered advantageous to the coexistence of weedy rice with cultivated rice. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Monrawee Fukuda
- Institute for Plant Protection, National Agriculture and Food Research Organization (NIPP), Tsukuba, Japan
| | - Toshiyuki Imaizumi
- Institute for Plant Protection, National Agriculture and Food Research Organization (NIPP), Tsukuba, Japan
| | - Akira Koarai
- Institute for Plant Protection, National Agriculture and Food Research Organization (NIPP), Tsukuba, Japan
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10
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Li Z, Gui R, Yu X, Liang C, Cui J, Zhao X, Zhang X, Yu P, Chen W, Sun J. Genetic basis of the early heading of high-latitude weedy rice. FRONTIERS IN PLANT SCIENCE 2022; 13:1059197. [PMID: 36544870 PMCID: PMC9760980 DOI: 10.3389/fpls.2022.1059197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/11/2022] [Indexed: 06/17/2023]
Abstract
Japonica rice (Oryza sativa L.) is an important staple food in high-latitude regions and is widely distributed in northern China, Japan, Korea, and Europe. However, the genetic diversity of japonica rice is relatively narrow and poorly adapted. Weedy rice (Oryza sativa f. spontanea) is a semi-domesticated rice. Its headings are earlier than the accompanied japonica rice, making it a potential new genetic resource, which can make up for the defects of wild rice that are difficult to be directly applied to japonica rice improvement caused by reproductive isolation. In this study, we applied a natural population consisting of weedy rice, japonica landrace, and japonica cultivar to conduct a genome-wide association study (GWAS) of the heading date and found four loci that could explain the natural variation of the heading date in this population. At the same time, we developed recombinant inbred lines (RILs) crossed by the early-heading weedy rice WR04-6 and its accompanied japonica cultivar ShenNong 265 (SN265) to carry out a QTL mapping analysis of the heading date and mapped four quantitative trait locus (QTLs) and three epistatic effect gene pairs. The major locus on chromosome 6 overlapped with the GWAS result. Further analysis found that two genes, Hd1 and OsCCT22, on chromosome 6 (Locus 2 and Locus 3) may be the key points of the early-heading character of weedy rice. As minor effect genes, Dth7 and Hd16 also have genetic contributions to the early heading of weedy rice. In the process of developing the RIL population, we introduced fragments of Locus 2 and Locus 3 from the weedy rice into super-high-yielding japonica rice, which successfully promoted its heading date by at least 10 days and expanded the rice suitable cultivation area northward by about 400 km. This study successfully revealed the genetic basis of the early heading of weedy rice and provided a new idea for the genetic improvement of cultivated rice by weedy rice.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Wenfu Chen
- *Correspondence: Wenfu Chen, ; Jian Sun,
| | - Jian Sun
- *Correspondence: Wenfu Chen, ; Jian Sun,
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11
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Imaizumi T, Kawahara Y, Auge G. Hybrid-derived weedy rice maintains adaptive combinations of alleles associated with seed dormancy. Mol Ecol 2022; 31:6556-6569. [PMID: 36178060 DOI: 10.1111/mec.16709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 09/19/2022] [Accepted: 09/21/2022] [Indexed: 01/13/2023]
Abstract
Plant hybridization is a pathway for the evolution of adaptive traits. However, hybridization between adapted and nonadapted populations may affect the persistence of combinations of adaptive alleles evolved through natural selection. Seed dormancy is an adaptive trait for weedy rice because it regulates the timing of seed germination and the persistence of the soil seed bank. Hybridization between weedy and cultivated rice has been confirmed with an adaptive introgression of deep seed dormancy alleles from cultivated rice. Here, we explored the influence of hybridization on the conservation of adaptive allele combinations by evaluating natural variation and genetic structure in seed dormancy-associated genomic regions. Based on sequence variation in the genomic regions associated with seed dormancy, hybrid-derived weedy rice strains maintained most of the adaptive combinations for this trait observed in the parental weedy rice, despite equal representation of the parental weedy and cultivated rice in the whole genome sequence. Moreover, hybrid-derived weedy rice strains were more dormant than their parental weedy rice strains, and this trait was strongly influenced by the environment. This study suggests that hybridization between weedy rice (adaptive allelic combinations for seed dormancy) and cultivated rice (nonadaptive combinations) generates weedy rice strains expressing deep seed dormancy caused by genome stabilization through the removal of alleles derived from cultivated rice, in addition to the adaptive introgression of deep seed dormancy alleles derived from cultivated rice. Thus, hybridization between adapted and nonadapted populations appears to be reinforcing the trajectory towards the evolution of adaptive traits.
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Affiliation(s)
- Toshiyuki Imaizumi
- Institute for Plant Protection, National Agriculture and Food Research Organization (NARO), Tsukuba, Japan
| | | | - Gabriela Auge
- Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET) - Instituto de Biociencias, Biotecnología y Biología Traslacional, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
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Hsu WC, Wu DH, Chen SW, Castillo SAC, Huang SD, Li CP, Wang YP. Insights into the genetic spatial structure of Nicaraguan weedy rice and control of its seed spread. PEST MANAGEMENT SCIENCE 2022; 78:3685-3696. [PMID: 35613256 DOI: 10.1002/ps.7011] [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: 10/28/2021] [Revised: 05/21/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The genetic backgrounds and occurrence patterns of weedy rice (WR, Oryza sativa) are highly diverse, and so are the challenges facing its control among countries. WR control is difficult because it is similar to cultivated rice and manual removal is one of the few options for control. Understanding the ecology of WR will aid efforts to break its life cycle and establish long-term management strategies under both irrigated and rainfed systems. RESULTS Nicaraguan WR (NWR) plants were genetically closer to the AUS and Indica pools in terms of to genetic distance. A map of admixture coefficients suggested a pattern of long-distance dispersal and spread of NWR across Nicaragua, which has likely been facilitated by commercial activities and sharing of harvesting equipment between border cities or important trading ports and inland regions. Moreover, the NWR plants from the soil seedbank in irrigated regions showed different habitats and lower grain number per panicle compared with plants spread by seed-mediated contamination. In addition, grain indexes showed that length-to-width ratio was a better indicator than awn length for distinguishing between NWR and Nicaraguan Indica cultivars. CONCLUSION Analysis of the population structure and habitats of NWR revealed five clusters derived from seed-mediated contamination in rainfed upland regions, plants from the soil seedbank in irrigated double-cropping regions, and pollen-mediated contamination across both regions. Field weed management before harvesting and seed purification based on the length-to-width ratio can be conducted to improve the efficiency of long-term control of WR in Nicaragua. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Wei-Chun Hsu
- Crop Science Division, Taiwan Agricultural Research Institute, Council of Agriculture, Taichung City, Taiwan
| | - Dong-Hong Wu
- Crop Science Division, Taiwan Agricultural Research Institute, Council of Agriculture, Taichung City, Taiwan
| | - Szu-Wu Chen
- Taiwan Technical Mission in Nicaragua, International Cooperation and Development Fund, Managua, Nicaragua
| | | | - Sih-Dun Huang
- Technical Cooperation Department, International Cooperation and Development Fund, Taipei, Taiwan
| | - Charng-Pei Li
- Crop Science Division, Taiwan Agricultural Research Institute, Council of Agriculture, Taichung City, Taiwan
| | - Yun-Ping Wang
- Technical Cooperation Department, International Cooperation and Development Fund, Taipei, Taiwan
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