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Xie D, Hao M, Zhao L, Chen X, Chen X, Jiang B, Ning S, Yuan Z, Zhang L, Shu K, Zhang Y, Liu D, Wu P. Transcriptomic analysis provides insight into the genetic regulation of shade avoidance in Aegilops tauschii. BMC PLANT BIOLOGY 2023; 23:336. [PMID: 37353759 DOI: 10.1186/s12870-023-04348-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 06/14/2023] [Indexed: 06/25/2023]
Abstract
BACKGROUND Weeds are not only economically important but also fascinating models for studying the adaptation of species in human-mediated environments. Aegilops tauschii is the D-genome donor species of common wheat but is also a weed that influences wheat production. How shading stress caused by adjacent wheat plants affects Ae. tauschii growth is a fundamental scientific question but is also important in agriculture, such as for weed control and wheat breeding. RESULT The present study indicated that shade avoidance is a strategy of Ae. tauschii in response to shading stress. Ae. tauschii plants exhibited growth increases in specific organs, such as stem and leaf elongation, to avoid shading. However, these changes were accompanied by sacrificing the growth of other parts of the plants, such as a reduction in tiller number. The two reverse phenotype responses seem to be formed by systemically regulating the expression of different genes. Fifty-six genes involved in the regulation of cell division and cell expansion were found to be downregulated, and one key upstream negative regulator (RPK2) of cell division was upregulated under shading stress. On the other hand, the upregulated genes under shading stress were mainly enriched in protein serine/threonine kinase activity and carbon metabolism, which are associated with cell enlargement, signal transduction and energy supply. The transcription factor WRKY72 may be important in regulating genes in response to shading stress, which can be used as a prior candidate gene for further study on the genetic regulation of shade avoidance. CONCLUSIONS This study sheds new light on the gene expression changes and molecular processes involved in the response and avoidance of Ae. tauschii to shading stress, which may aid more effective development of shading stress avoidance or cultivars in wheat and other crops in the future.
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Affiliation(s)
- Die Xie
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Ming Hao
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Laibin Zhao
- Henan Provincial Key Laboratory of Hybrid Wheat, School of Life Science and Technology, Henan Institute of Science and Technology, Xinxiang, 453003, China
| | - Xue Chen
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Xuejiao Chen
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Bo Jiang
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Shunzong Ning
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Zhongwei Yuan
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Lianquan Zhang
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China
| | - Kai Shu
- School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, 710012, China
| | - Yijing Zhang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Dengcai Liu
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China.
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China.
| | - Peipei Wu
- Triticeae Research Institute, Sichuan Agricultural University at Chengdu, Wenjiang, 611130, Sichuan, China.
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2
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Genomic revolution of US weedy rice in response to 21st century agricultural technologies. Commun Biol 2022; 5:885. [PMID: 36076028 PMCID: PMC9458635 DOI: 10.1038/s42003-022-03803-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 08/04/2022] [Indexed: 11/08/2022] Open
Abstract
Weedy rice is a close relative of cultivated rice that devastates rice productivity worldwide. In the southern United States, two distinct strains have been historically predominant, but the 21st century introduction of hybrid rice and herbicide resistant rice technologies has dramatically altered the weedy rice selective landscape. Here, we use whole-genome sequences of 48 contemporary weedy rice accessions to investigate the genomic consequences of crop-weed hybridization and selection for herbicide resistance. We find that population dynamics have shifted such that most contemporary weeds are now crop-weed hybrid derivatives, and that their genomes have subsequently evolved to be more like their weedy ancestors. Haplotype analysis reveals extensive adaptive introgression of cultivated alleles at the resistance gene ALS, but also uncovers evidence for convergent molecular evolution in accessions with no signs of hybrid origin. The results of this study suggest a new era of weedy rice evolution in the United States.
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3
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Tanigaki S, Uchino A, Okawa S, Miura C, Hamamura K, Matsuo M, Yoshino N, Ueno N, Toyama Y, Fukumi N, Kijima E, Masuda T, Shimono Y, Tominaga T, Iwakami S. Gene expression shapes the patterns of parallel evolution of herbicide resistance in the agricultural weed Monochoria vaginalis. THE NEW PHYTOLOGIST 2021; 232:928-940. [PMID: 34270808 DOI: 10.1111/nph.17624] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
The evolution of herbicide resistance in weeds is an example of parallel evolution, through which genes encoding herbicide target proteins are repeatedly represented as evolutionary targets. The number of herbicide target-site genes differs among species, and little is known regarding the effects of duplicate gene copies on the evolution of herbicide resistance. We investigated the evolution of herbicide resistance in Monochoria vaginalis, which carries five copies of sulfonylurea target-site acetolactate synthase (ALS) genes. Suspected resistant populations collected across Japan were investigated for herbicide sensitivity and ALS gene sequences, followed by functional characterization and ALS gene expression analysis. We identified over 60 resistant populations, all of which carried resistance-conferring amino acid substitutions exclusively in MvALS1 or MvALS3. All MvALS4 alleles carried a loss-of-function mutation. Although the enzymatic properties of ALS encoded by these genes were not markedly different, the expression of MvALS1 and MvALS3 was prominently higher among all ALS genes. The higher expression of MvALS1 and MvALS3 is the driving force of the biased representation of genes during the evolution of herbicide resistance in M. vaginalis. Our findings highlight that gene expression is a key factor in creating evolutionary hotspots.
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Affiliation(s)
- Shinji Tanigaki
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Akira Uchino
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Tsu, 514-2392, Japan
| | - Shigenori Okawa
- Miyagi Prefectural Furukawa Agricultural Experiment Station, Fukoku 88, Furukawa-Osaki, 989-6227, Japan
| | - Chikako Miura
- Akita Prefectural Agricultural Experiment Station, 34-1 Yuwaaikawa-azagenpachizawa, Akita, 010-1231, Japan
| | - Kenshiro Hamamura
- Japan Association for Advancement of Phyto-Regulators (JAPR), 860 Kashiwada-cho, Ushiku, 300-1211, Japan
| | - Mitsuhiro Matsuo
- Field Science Center, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai-nishi, Miyazaki, 889-2192, Japan
| | - Namiko Yoshino
- Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, 50 Harajukuminami, Arai, 960-2156, Japan
| | - Naoya Ueno
- Yamanashi Prefectural Agritechnology Center, 1100 Shimoimai, Kai, 400-0105, Japan
| | - Yusuke Toyama
- Shizuoka Prefectural Research Institute of Agriculture and Forestry, 678-1 Tomigaoka, Iwata, 438-0803, Japan
| | - Naoya Fukumi
- Tottori Agricultural Experiment Station, 260 Hashimoto, Tottori, 680-1142, Japan
| | - Eiji Kijima
- Yamaguchi Prefectural Agriculture and Forestry General Technology Center, 1-1-1 Ouchihikami, Yamaguchi, 753-0231, Japan
| | - Taro Masuda
- Faculty of Agriculture, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, 573-0101, Japan
| | - Yoshiko Shimono
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Tohru Tominaga
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Satoshi Iwakami
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
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4
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Imaizumi T, Ebana K, Kawahara Y, Muto C, Kobayashi H, Koarai A, Olsen KM. Genomic divergence during feralization reveals both conserved and distinct mechanisms of parallel weediness evolution. Commun Biol 2021; 4:952. [PMID: 34376793 PMCID: PMC8355325 DOI: 10.1038/s42003-021-02484-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/23/2021] [Indexed: 12/28/2022] Open
Abstract
Agricultural weeds are the most important biotic constraints to global crop production, and chief among these is weedy rice. Despite increasing yield losses from weedy rice in recent years worldwide, the genetic basis of weediness evolution remains unclear. Using whole-genome sequence analyses, we examined the origins and adaptation of Japanese weedy rice. We find evidence for a weed origin from tropical japonica crop ancestry, which has not previously been documented in surveys of weedy rice worldwide. We further show that adaptation occurs largely through different genetic mechanisms between independently-evolved temperate japonica- and tropical japonica-derived strains; most genomic signatures of positive selection are unique within weed types. In addition, some weedy rice strains have evolved through hybridization between weedy and cultivated rice with adaptive introgression from the crop. Surprisingly, introgression from cultivated rice confers not only crop-like adaptive traits (such as shorter plant height, facilitating crop mimicry) but also weedy-like traits (such as seed dormancy). These findings reveal how hybridization with cultivated rice can promote persistence and proliferation of weedy rice.
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Affiliation(s)
- Toshiyuki Imaizumi
- Institute for Plant Protection, National Agriculture and Food Research Organization, Tsukuba, Japan.
| | - Kaworu Ebana
- Research Center of Genetic Resources, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Yoshihiro Kawahara
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Chiaki Muto
- Research Center of Genetic Resources, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Hiroyuki Kobayashi
- Central Region Agricultural Research Center, National Agriculture and Food Research Organization, Tsukuba, Japan
- Center for Weed and Wildlife Management, Utsunomiya University, Utsunomiya, Japan
| | - Akira Koarai
- Institute for Plant Protection, National Agriculture and Food Research Organization, Tsukuba, Japan
| | - Kenneth M Olsen
- Department of Biology, Washington University in St. Louis, St. Louis, USA
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5
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Goad DM, Jia Y, Gibbons A, Liu Y, Gealy D, Caicedo AL, Olsen KM. Identification of Novel QTL Conferring Sheath Blight Resistance in Two Weedy Rice Mapping Populations. RICE (NEW YORK, N.Y.) 2020; 13:21. [PMID: 32206941 PMCID: PMC7090113 DOI: 10.1186/s12284-020-00381-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 03/06/2020] [Indexed: 05/05/2023]
Abstract
BACKGROUND Rice sheath blight (ShB) disease, caused by the pathogenic fungus Rhizoctonia solani, causes significant yield losses globally. US weedy rice populations, which are de-domesticated forms of indica and aus cultivated rice, appear to be more resistant to ShB than local japonica cultivated rice. We mapped quantitative trait loci (QTL) associated with ShB resistance using two F8 recombinant inbred line populations generated from crosses of an indica crop variety, Dee-Geo-Woo-Gen (DGWG), with individuals representing the two major US weed biotypes, straw hull (SH) and black hull awned (BHA). RESULTS We identified nine ShB resistance QTL across both mapping populations. Five were attributable to alleles that affect plant height (PH) and heading date (HD), two growth traits that are known to be highly correlated with ShB resistance. By utilizing an approach that treated growth traits as covariates in the mapping model, we were able to infer that the remaining four QTL are involved in ShB resistance. Two of these, qShB1-2 and qShB4, are different from previously identified ShB QTL and represent new candidates for further study. CONCLUSION Our findings suggest that ShB resistance can be improved through favorable plant growth traits and the combined effects of small to moderate-effect resistance QTL. Additionally, we show that including PH and HD as covariates in QTL mapping models is a powerful way to identify new ShB resistance QTL.
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Affiliation(s)
- David M Goad
- Department of Biology, Washington University in St. Louis, 1 Brookings Drive, Campus Box 1137, St. Louis, MO, 63110, USA
| | - Yulin Jia
- United States Department of Agriculture-Agricultural Research Service, Dale Bumpers National Rice Research Center, 2890 HWY 130 E, Stuttgart, AR, 72160, USA.
| | - Andrew Gibbons
- University of Arkansas Rice Research and Extension Center, 2900 AR-130, Stuttgart, AR, 72160, USA
- Present address: Arkansas Department of Health, Little Rock, AR, 72205, USA
| | - Yan Liu
- Present address: Department of Plant Pathology, Washington State University, Pullman, WA, 99164, USA
| | - David Gealy
- United States Department of Agriculture-Agricultural Research Service, Dale Bumpers National Rice Research Center, 2890 HWY 130 E, Stuttgart, AR, 72160, USA
| | - Ana L Caicedo
- Department of Biology, University of Massachusetts, Amherst, USA
| | - Kenneth M Olsen
- Department of Biology, Washington University in St. Louis, 1 Brookings Drive, Campus Box 1137, St. Louis, MO, 63110, USA
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6
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Xie H, Han Y, Li X, Dai W, Song X, Olsen KM, Qiang S. Climate‐dependent variation in cold tolerance of weedy rice and rice mediated by
OsICE1
promoter methylation. Mol Ecol 2019; 29:121-137. [DOI: 10.1111/mec.15305] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 10/23/2019] [Accepted: 10/28/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Hongjie Xie
- Weed Research Laboratory Nanjing Agricultural University Nanjing China
| | - Yihao Han
- Weed Research Laboratory Nanjing Agricultural University Nanjing China
| | - Xinyue Li
- Weed Research Laboratory Nanjing Agricultural University Nanjing China
| | - Weimin Dai
- Weed Research Laboratory Nanjing Agricultural University Nanjing China
| | - Xiaoling Song
- Weed Research Laboratory Nanjing Agricultural University Nanjing China
| | - Kenneth M. Olsen
- Department of Biology Washington University in St. Louis St. Louis MO USA
| | - Sheng Qiang
- Weed Research Laboratory Nanjing Agricultural University Nanjing China
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7
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Jiang YF, Chen Q, Wang Y, Guo ZR, Xu BJ, Zhu J, Zhang YZ, Gong X, Luo CH, Wu W, Liu CH, Kong L, Deng M, Jiang QT, Lan XJ, Wang JR, Chen GY, Zheng YL, Wei YM, Qi PF. Re-acquisition of the brittle rachis trait via a transposon insertion in domestication gene Q during wheat de-domestication. THE NEW PHYTOLOGIST 2019; 224:961-973. [PMID: 31168798 DOI: 10.1111/nph.15977] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 05/28/2019] [Indexed: 05/18/2023]
Abstract
De-domestication is a unique evolutionary process during which crops re-acquire wild-like traits to survive and persist in agricultural fields without the need for human cultivation. The re-acquisition of seed dispersal mechanisms is crucial for crop de-domestication. Common wheat is an important cereal crop worldwide. Tibetan semi-wild wheat is a potential de-domesticated common wheat subspecies. However, the crucial genes responsible for its brittle rachis trait have not been identified. Genetic mapping, functional analyses and phylogenetic analyses were completed to identify the gene associated with Qbr.sau-5A, which is a major locus for the brittle rachis trait of Tibetan semi-wild wheat. The cloned Qbr.sau-5A gene is a new Q allele (Qt ) with a 161-bp transposon insertion in exon 5. Although Qt is expressed normally, its encoded peptide lacks some key features of the APETALA2 family. The abnormal functions of Qt in developing wheat spikes result in brittle rachises. Phylogenetic and genotyping analyses confirmed that Qt originated from Q in common wheat and is naturally distributed only in Tibetan semi-wild wheat populations. The identification of Qt provides new evidence regarding the origin of Tibetan semi-wild wheat, and new insights into the re-acquisition of wild traits during crop de-domestication.
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Affiliation(s)
- Yun-Feng Jiang
- State Key Laboratory of Crop Genetics of Disease Resistance and Disease Control, Chengdu, Sichuan, 611130, China
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Qing Chen
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yan Wang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Zhen-Ru Guo
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Bin-Jie Xu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Jing Zhu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Ya-Zhou Zhang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xi Gong
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Cui-Hua Luo
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Wang Wu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Cai-Hong Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Li Kong
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Mei Deng
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Qian-Tao Jiang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xiu-Jin Lan
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Ji-Rui Wang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Guo-Yue Chen
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - You-Liang Zheng
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yu-Ming Wei
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Peng-Fei Qi
- State Key Laboratory of Crop Genetics of Disease Resistance and Disease Control, Chengdu, Sichuan, 611130, China
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
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8
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Wedger MJ, Topp CN, Olsen KM. Convergent evolution of root system architecture in two independently evolved lineages of weedy rice. THE NEW PHYTOLOGIST 2019; 223:1031-1042. [PMID: 30883803 DOI: 10.1111/nph.15791] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/11/2019] [Indexed: 05/13/2023]
Abstract
Root system architecture (RSA) is a critical aspect of plant growth and competitive ability. Here we used two independently evolved strains of weedy rice, a de-domesticated form of rice, to study the evolution of weed-associated RSA traits and the extent to which they evolve through shared or different genetic mechanisms. We characterised 98 two-dimensional and three-dimensional RSA traits in 671 plants representing parents and descendants of two recombinant inbred line populations derived from two weed × crop crosses. A random forest machine learning model was used to assess the degree to which root traits can predict genotype and the most diagnostic traits for doing so. We used quantitative trait locus (QTL) mapping to compare genetic architecture between the weed strains. The two weeds were distinguishable from the crop in similar and predictable ways, suggesting independent evolution of a 'weedy' RSA phenotype. Notably, comparative QTL mapping revealed little evidence for shared underlying genetic mechanisms. Our findings suggest that despite the double bottlenecks of domestication and de-domestication, weedy rice nonetheless shows genetic flexibility in the repeated evolution of weedy RSA traits. Whereas the root growth of cultivated rice may facilitate interactions among neighbouring plants, the weedy rice phenotype may minimise below-ground contact as a competitive strategy.
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Affiliation(s)
- Marshall J Wedger
- Biology Department, Campus Box 1137, Washington University in St Louis, 1 Brookings Dr., St Louis, MO, 63130, USA
| | - Christopher N Topp
- Donald Danforth Plant Science Center, 975 N Warson Rd, St Louis, MO, 63132, USA
| | - Kenneth M Olsen
- Biology Department, Campus Box 1137, Washington University in St Louis, 1 Brookings Dr., St Louis, MO, 63130, USA
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9
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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.
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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
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10
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The complex geography of domestication of the African rice Oryza glaberrima. PLoS Genet 2019; 15:e1007414. [PMID: 30845217 PMCID: PMC6424484 DOI: 10.1371/journal.pgen.1007414] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 03/19/2019] [Accepted: 02/08/2019] [Indexed: 11/19/2022] Open
Abstract
While the domestication history of Asian rice has been extensively studied, details of the evolution of African rice remain elusive. The inner Niger delta has been suggested as the center of origin but molecular data to support this hypothesis is lacking. Here, we present a comprehensive analysis of the evolutionary and domestication history of African rice. By analyzing whole genome re-sequencing data from 282 individuals of domesticated African rice Oryza glaberrima and its progenitor O. barthii, we hypothesize a non-centric (i.e. multiregional) domestication origin for African rice. Our analyses showed genetic structure within O. glaberrima that has a geographical association. Furthermore, we have evidence that the previously hypothesized O. barthii progenitor populations in West Africa have evolutionary signatures similar to domesticated rice and carried causal domestication mutations, suggesting those progenitors were either mislabeled or may actually represent feral wild-domesticated hybrids. Phylogeographic analysis of genes involved in the core domestication process suggests that the origins of causal domestication mutations could be traced to wild progenitors in multiple different locations in West and Central Africa. In addition, measurements of panicle threshability, a key early domestication trait for seed shattering, were consistent with the gene phylogeographic results. We suggest seed non-shattering was selected from multiple genotypes, possibly arising from different geographical regions. Based on our evidence, O. glaberrima was not domesticated from a single centric location but was a result of diffuse process where multiple regions contributed key alleles for different domestication traits. For many crops it is not clear how they were domesticated from their wild progenitors. Transition from a wild to domesticated state required a series of genetic changes, and studying the evolutionary origin of these domestication-causing mutations are key to understanding the domestication origins of a crop. Moreover, population comparisons provide insight into the relationship between wild and cultivated populations and the evolutionary history of domestication. In this study, we investigated the domestication history of Oryza glaberrima, a rice species that was domesticated in West Africa independent from the Asian rice species O. sativa. Using genome-wide data from a large sample of domesticated and wild African rice samples we did not find evidence that supported the established domestication model for O. glaberrima—a single domestication origin. Rather, our evidence suggests the domestication process for African rice was initiated in multiple regions of West Africa, caused potentially by the local environments and cultivation preference of people. Hence domestication of African rice was a multi-regional process.
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11
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Guo L, Qiu J, Li LF, Lu B, Olsen K, Fan L. Genomic Clues for Crop-Weed Interactions and Evolution. TRENDS IN PLANT SCIENCE 2018; 23:1102-1115. [PMID: 30293809 DOI: 10.1016/j.tplants.2018.09.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 08/10/2018] [Accepted: 09/11/2018] [Indexed: 05/11/2023]
Abstract
Agronomically critical weeds that have evolved alongside crop species are characterized by rapid adaptation and invasiveness, which can result in an enormous reduction in annual crop yield worldwide. We discuss here recent genome-based research studies on agricultural weeds and crop-weed interactions that reveal several major evolutionary innovations such as de-domestication, interactions mediated by allelochemical secondary metabolites, and parasitic genetic elements that play crucial roles in enhancing weed invasiveness in agricultural settings. We believe that these key studies will guide future research into the evolution of crop-weed interactions, and further the development of practical applications in agricultural weed control and crop breeding.
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Affiliation(s)
- Longbiao Guo
- State Key Lab for Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, China; These authors contributed equally to this work
| | - Jie Qiu
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA; These authors contributed equally to this work
| | - Lin-Feng Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Baorong Lu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Kenneth Olsen
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Longjiang Fan
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
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