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Li G, Zhu W, Tian M, Liu R, Ruan Y, Liu C. Genome-Wide Identification of the SPP/SPPL Gene Family and BnaSPPL4 Regulating Male Fertility in Rapeseed ( Brassica napus L.). Int J Mol Sci 2024; 25:3936. [PMID: 38612746 PMCID: PMC11012144 DOI: 10.3390/ijms25073936] [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: 02/27/2024] [Revised: 03/23/2024] [Accepted: 03/31/2024] [Indexed: 04/14/2024] Open
Abstract
Signal peptide peptidase (SPP) and its homologs, signal peptide peptidase-like (SPPL) proteases, are members of the GxGD-type aspartyl protease family, which is widespread in plants and animals and is a class of transmembrane proteins with significant biological functions. SPP/SPPLs have been identified; however, the functions of SPP/SPPL in rapeseed (Brassica napus L.) have not been reported. In this study, 26 SPP/SPPLs were identified in rapeseed and categorized into three groups: SPP, SPPL2, and SPPL3. These members mainly contained the Peptidase_A22 and PA domains, which were distributed on 17 out of 19 chromosomes. Evolutionary analyses indicated that BnaSPP/SPPLs evolved with a large number of whole-genome duplication (WGD) events and strong purifying selection. Members are widely expressed and play a key role in the growth and development of rapeseed. The regulation of rapeseed pollen fertility by the BnaSPPL4 gene was further validated through experiments based on bioinformatics analysis, concluding that BnaSPPL4 silencing causes male sterility. Cytological observation showed that male infertility caused by loss of BnaSPPL4 gene function occurs late in the mononucleate stage due to microspore dysplasia.
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Affiliation(s)
- Guangze Li
- Yuelushan Laboratory, Hunan Agricultural University, Changsha 410128, China; (G.L.); (W.Z.); (M.T.); (R.L.); (Y.R.)
- Key Laboratory of Hunan Provincial on Crop Epigenetic Regulation and Development, Hunan Agricultural University, Changsha 410128, China
| | - Wenjun Zhu
- Yuelushan Laboratory, Hunan Agricultural University, Changsha 410128, China; (G.L.); (W.Z.); (M.T.); (R.L.); (Y.R.)
- Key Laboratory of Hunan Provincial on Crop Epigenetic Regulation and Development, Hunan Agricultural University, Changsha 410128, China
| | - Minyu Tian
- Yuelushan Laboratory, Hunan Agricultural University, Changsha 410128, China; (G.L.); (W.Z.); (M.T.); (R.L.); (Y.R.)
- Key Laboratory of Hunan Provincial on Crop Epigenetic Regulation and Development, Hunan Agricultural University, Changsha 410128, China
| | - Rong Liu
- Yuelushan Laboratory, Hunan Agricultural University, Changsha 410128, China; (G.L.); (W.Z.); (M.T.); (R.L.); (Y.R.)
- Key Laboratory of Hunan Provincial on Crop Epigenetic Regulation and Development, Hunan Agricultural University, Changsha 410128, China
| | - Ying Ruan
- Yuelushan Laboratory, Hunan Agricultural University, Changsha 410128, China; (G.L.); (W.Z.); (M.T.); (R.L.); (Y.R.)
- Key Laboratory of Hunan Provincial on Crop Epigenetic Regulation and Development, Hunan Agricultural University, Changsha 410128, China
| | - Chunlin Liu
- Yuelushan Laboratory, Hunan Agricultural University, Changsha 410128, China; (G.L.); (W.Z.); (M.T.); (R.L.); (Y.R.)
- Key Laboratory of Hunan Provincial on Crop Epigenetic Regulation and Development, Hunan Agricultural University, Changsha 410128, China
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Sun Y, Zhang D, Dong H, Wang Z, Wang J, Lv H, Guo Y, Hu S. Comparative transcriptome analysis provides insight into the important pathways and key genes related to the pollen abortion in the thermo-sensitive genic male sterile line 373S in Brassica napus L. Funct Integr Genomics 2022; 23:26. [PMID: 36576592 DOI: 10.1007/s10142-022-00943-8] [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: 09/08/2021] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/29/2022]
Abstract
The thermo-sensitive genic male sterility (TGMS) system plays a key role in the production of two-line hybrids in rapeseed (Brassica napus). To uncover key cellular events and genetic regulation associated with TGMS, a combined study using cytological methods and RNA-sequencing analysis was conducted for the rapeseed TGMS line 373S. Cytological studies showed that microspore cytoplasm of 373S plants was condensed, the microspore nucleus was degraded at an early stage, the exine was irregular, and the tapetum developed abnormally, eventually leading to male sterility. RNA-sequencing analysis identified 430 differentially expressed genes (298 upregulated and 132 downregulated) between the fertile and sterile samples. Gene ontology analysis demonstrated that the most highly represented biological processes included sporopollenin biosynthetic process, pollen exine formation, and extracellular matrix assembly. Kyoto encyclopedia of genes and genomes analysis indicated that the enriched pathways included amino acid metabolism, carbohydrate metabolism, and lipid metabolism. Moreover, 26 transcript factors were identified, which may be associated with abnormal tapetum degeneration and exine formation. Subsequently, 19 key genes were selected, which are considered to regulate pollen development and even participate in pollen exine formation. Our results will provide important insight into the molecular mechanisms underlying TGMS in rapeseed.
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Affiliation(s)
- Yanyan Sun
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China.,Soybean Research Institute, Jilin Academy of Agricultural Sciences, Changchun, 130033, China
| | - Dongsuo Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Hui Dong
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Zhenzhen Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jing Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Huijie Lv
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yuan Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Shengwu Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Yu Y, Jiang Y, Wang L, Wu Y, Liao J, Zhong M, Yang R, Chen X, Li Q, Zhang L. Comparative transcriptome analysis reveals key insights into male sterility in Salvia miltiorrhiza Bunge. PeerJ 2021; 9:e11326. [PMID: 33987012 PMCID: PMC8086568 DOI: 10.7717/peerj.11326] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 03/31/2021] [Indexed: 11/20/2022] Open
Abstract
Background Large-scale heterosis breeding depends upon stable, inherited male sterility lines. We accidentally discovered a male sterility line (SW-S) in the F1progeny of a Salvia miltiorrhiza Bunge from Shandong, China (purple flowers) crossed with a S. miltiorrhiza f. alba from Sichuan, China (white flowers). We sought to provide insights into the pollen development for male sterility in S. miltiorrhiza. Methods The phenotypic and cytological features of the SW-S and fertile control SW-F were observed using scanning electron microscopy and paraffin sections to identify the key stage of male sterility. Transcriptome profiles were recorded for anthers at the tetrad stage of SW-S and SW-F using Illumina RNA-Seq. Results The paraffin sections showed that sterility mainly occurred at the tetrad stage of microspore development, during which the tapetum cells in the anther compartment completely fell off and gradually degraded in the sterile line. There was little-to-no callose deposited around the microspore cells. The tetrad microspore was shriveled and had abnormal morphology. Therefore, anthers at the tetrad stage of SW-S and fertile control SW-F were selected for comparative transcriptome analysis. In total, 266,722,270 clean reads were obtained from SW-S and SW-F, which contained 36,534 genes. There were 2,571 differentially expressed genes (DEGs) in SW-S and SW-F, of which 63.5% were downregulated. Gene Ontology (GO) enrichment analysis indicated that the differentially expressed genes were enriched in 56 functional groups (GO terms); of these, all DEGs involved in microgametogenesis and developmental maturation were downregulated in SW-S. These results were confirmed by quantitative RT-PCR. The two GO terms contained 18 DEGs, among which eight DEGs (namely: GPAT3, RHF1A, phosphatidylinositol, PFAS, MYB96, MYB78, Cals5, and LAT52) were related to gamete development. There were 10 DEGs related to development and maturation, among which three genes were directly related to pollen development (namely: ACT3, RPK2, and DRP1C). Therefore, we believe that these genes are directly or indirectly involved in the pollen abortion of SW-S. Our study provides insight into key genes related to sterility traits in S. miltiorrhiza, and the results can be further exploited in functional and mechanism studies.
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Affiliation(s)
- Yan Yu
- College of Sciences, Sichuan Agricultural University, Ya'an, Sichuan, China.,College of Life Science, China West Normal University, Nanchong, Sichuan, China
| | - Yuanyuan Jiang
- College of Sciences, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Long Wang
- College of Sciences, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Yichao Wu
- College of Life Science, China West Normal University, Nanchong, Sichuan, China
| | - Jinqiu Liao
- College of Life Science, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Mingzhi Zhong
- College of Sciences, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Ruiwu Yang
- College of Life Science, Sichuan Agricultural University, Ya'an, Sichuan, China
| | - Xingfu Chen
- College of Agronomy, Sichuan Agricultural University, Wenjiang, Sichuan, China
| | - Qingmiao Li
- Sichuan Provincial Key Laboratory of Quality and Innovation Research of Chinese Materia Medica, Sichuan Academy of Chinese Medicine Sciences, Chengdu, Sichuan, China
| | - Li Zhang
- College of Sciences, Sichuan Agricultural University, Ya'an, Sichuan, China
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Zeng X, Li H, Li K, Yuan R, Zhao S, Li J, Luo J, Li X, Ma H, Wu G, Yan X. Evolution of the Brassicaceae-specific MS5-Like family and neofunctionalization of the novel MALE STERILITY 5 gene essential for male fertility in Brassica napus. THE NEW PHYTOLOGIST 2021; 229:2339-2356. [PMID: 33128826 PMCID: PMC7894334 DOI: 10.1111/nph.17053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Accepted: 10/08/2020] [Indexed: 05/22/2023]
Abstract
New genes (or lineage-specific genes) can facilitate functional innovations. MALE STERILITY 5 (MS5) in Brassica napus is a fertility-related new gene, which has two wild-type alleles (BnMS5a and BnMS5c ) and two mutant alleles (BnMS5b and BnMS5d ) that could induce male sterility. Here, we studied the history and functional evolution of MS5 homologs in plants by phylogenetic analysis and molecular genetic experiments. We identified 727 MS5 homologs and found that they define a Brassicaceae-specific gene family that has expanded partly via multiple tandem gene duplications and also probably transpositions. The MS5 in B. napus is inherited from a basic diploid ancestor of B. rapa. Molecular genetic experiments indicate that BnMS5a and BnMS5c are functionally distinct in B. napus and that BnMS5d can inhibit BnMS5a in B. napus in a dosage-dependent manner. The BnMS5a protein can move in coordination with meiotic telomeres and interact with the nuclear envelope protein SUN1, with a possible crucial role in meiotic chromosome behavior. In summary, BnMS5 belongs to a Brassicaceae-specific new gene family, and has gained a novel function that is essential for male fertility in B. napus through neofunctionalization that has likely occurred since the origin of B. rapa.
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Affiliation(s)
- Xinhua Zeng
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Hao Li
- Department of Biologythe Huck Institutes of the Life Sciencesthe Pennsylvania State UniversityUniversity ParkPA16802USA
| | - Keqi Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Rong Yuan
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Shengbo Zhao
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Jun Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Junling Luo
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Xiaofei Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Hong Ma
- Department of Biologythe Huck Institutes of the Life Sciencesthe Pennsylvania State UniversityUniversity ParkPA16802USA
| | - Gang Wu
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
| | - Xiaohong Yan
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of AgricultureWuhan430062China
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Zhang X, Chen H, Zhang Q, Zhang Y, Xiao Z, Guo Y, Yu F, Hu S. Cytological and genetic characterisation of dominant GMS line Shaan-GMS in Brassica napus L. J Appl Genet 2020; 61:477-488. [PMID: 32715437 DOI: 10.1007/s13353-020-00570-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 06/13/2020] [Accepted: 06/17/2020] [Indexed: 10/23/2022]
Abstract
Genic male sterility (GMS) is an effective pollination control system applied in the hybrid breeding of Brassica napus L. Shaan-GMS is a spontaneous mutant of dominant GMS in B. napus. In this research, anther abortion in the homozygous two-type line 9A15AB derived from Shaan-GMS was characterised with the combined use of light microscopy and transmission electron microscopy. Results indicated that the most striking differences between the fertile and sterile plants occurred in the tapetum in the early microsporocyte stage. In sterile plants, the tapetal cells were irregularly arranged, multi-layered and occupied the growing space of microsporocytes. When entering into meiosis, the tapetum cells degraded and the cytoplasm fused. Some oval monolayer or bilayer membrane organelles existed in the tapetal cells in sterile anthers. Mitochondria in the tapetal cells were abnormal, and middle layer cells degraded early. Pollen mother cells of Shaan-GMS degenerated at the start of meiosis and ceased at the anaphase I stage, with no dyads or tetrads formed. The combined effects of the abnormal development of the tapetum, the middle layer cells and meiosis lead to male sterility in Shaan-GMS. Inheritance of male sterility of Shaan-GMS is controlled by a monogenically multiallelic locus with three different alleles (Ms, ms and Mf), with a relationship expressed as Mf > Ms and Ms > ms. The findings help lay the foundation for illustrating the mechanism of male sterility and the utilisation of Shaan-GMS in rapeseed.
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Affiliation(s)
- Xiaojuan Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, Shaanxi, People's Republic of China
| | - Haiyan Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Qian Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Yunxiao Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Zhaodi Xiao
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Yuan Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.,College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Fei Yu
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China. .,College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Shengwu Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China. .,College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.
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Sun Y, Zhang D, Wang Z, Guo Y, Sun X, Li W, Zhi W, Hu S. Cytological observation of anther structure and genetic investigation of a thermo-sensitive genic male sterile line 373S in Brassica napus L. BMC PLANT BIOLOGY 2020; 20:8. [PMID: 31906856 PMCID: PMC6945434 DOI: 10.1186/s12870-019-2220-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 12/30/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Photoperiod and/or thermo-sensitive male sterility is an effective pollination control system in crop two-line hybrid breeding. We previously discovered the spontaneous mutation of a partially male sterile plant and developed a thermo-sensitive genic male sterile (TGMS) line 373S in Brassica napus L. The present study characterized this TGMS line through cytological observation, photoperiod/ temperature treatments, and genetic investigation. RESULTS Microscopic observation revealed that the condensed cytoplasm and irregular exine of microspores and the abnormal degradation of tapetum are related to pollen abortion. Different temperature and photoperiod treatments in field and growth cabinet conditions indicated that the fertility alteration of 373S was mainly caused by temperature changes. The effects of photoperiod and interaction between temperature and photoperiod were insignificant. The critical temperature leading to fertility alteration ranged from 10 °C (15 °C/5 °C) to 12 °C (17 °C/7 °C), and the temperature-responding stage was coincident with anther development from pollen mother cell formation to meiosis stages. Genetic analysis indicated that the TGMS trait in 373S was controlled by one pair of genes, with male sterility as the recessive. Multiplex PCR analysis revealed that the cytoplasm of 373S is pol type. CONCLUSIONS Our study suggested that the 373S line in B. napus has a novel thermo-sensitive gene Bnmst1 in Pol CMS cytoplasm background, and its fertility alteration is mainly caused by temperature changes. Our results will broaden the TGMS resources and lay the foundation for two-line hybrid breeding in B. napus.
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Affiliation(s)
- Yanyan Sun
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
| | - Dongsuo Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
| | - Zhenzhen Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
| | - Yuan Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
| | - Xiaomin Sun
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
- Hanzhong Agricultural Science Institute, Hanzhong, 723000 Shaanxi China
| | - Wei Li
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
| | - Wenliang Zhi
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
| | - Shengwu Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Agronomy, Northwest A&F University, Agri-Science Building Rm 733, Yangling, 712100 Shaanxi China
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Kim YJ, Zhang D. Molecular Control of Male Fertility for Crop Hybrid Breeding. TRENDS IN PLANT SCIENCE 2018; 23:53-65. [PMID: 29126789 DOI: 10.1016/j.tplants.2017.10.001] [Citation(s) in RCA: 139] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 10/17/2017] [Accepted: 10/18/2017] [Indexed: 05/22/2023]
Abstract
In many plant species, male-sterile female lines with cytoplasmic male sterility (CMS) or nuclear-controlled environment-sensitive genic male sterility (EGMS) have long been used to efficiently produce hybrids that harness hybrid vigor or heterosis. However, the underlying molecular mechanisms for these applications have only recently been uncovered in a few species. We provide here an update on the understanding of cytoplasmic-nuclear communication based on the discovery of mitochondrial CMS genes and their corresponding nuclear fertility determinants. Recent findings that uncover diverse mechanisms such as epigenetic, transcriptional, and post-transcriptional controls of EGMS by temperature and photoperiod signals are also reviewed. Furthermore, translational research that applies basic knowledge of plant male fertility control to hybrid seed production practice is highlighted.
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Affiliation(s)
- Yu-Jin Kim
- Joint International Research Laboratory of Metabolic and Developmental Sciences, State Key Laboratory of Hybrid Rice, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Department of Oriental Medicinal Biotechnology, College of Life Science, Kyung Hee University, Yongin 446-701, South Korea
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, State Key Laboratory of Hybrid Rice, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; School of Agriculture, Food, and Wine, University of Adelaide, South Australia 5064, Australia.
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Zeng X, Yan X, Yuan R, Li K, Wu Y, Liu F, Luo J, Li J, Wu G. Identification and Analysis of MS5d: A Gene That Affects Double-Strand Break (DSB) Repair during Meiosis I in Brassica napus Microsporocytes. FRONTIERS IN PLANT SCIENCE 2017; 7:1966. [PMID: 28101089 PMCID: PMC5209369 DOI: 10.3389/fpls.2016.01966] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 12/12/2016] [Indexed: 05/13/2023]
Abstract
Here, we report the identification of the Brassica-specific gene MS5d, which is responsible for male sterility in Brassica napus. The MS5d gene is highly expressed in the microsporocyte and encodes a protein that localizes to the nucleus. Light microscopy analyses have demonstrated that the MS5d gene affects microsporocyte meiosis in the thermosensitive genic male sterility line TE5A. Sequence comparisons and genetic complementation revealed a C-to-T transition in MS5d, encoding a Leu-to-Phe (L281F) substitution and causing abnormal male meiosis in TE5A. These findings suggest arrested meiotic chromosome dynamics at pachytene. Furthermore, immunofluorescence analyses showed that double-strand break (DSB) formation and axial elements were normal but that DSB repair and spindle behavior were aberrant in TE5A meiocytes. Collectively, our results indicate that MS5d likely encodes a protein required for chromosomal DSB repair at early stages of meiosis in B. napus.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Gang Wu
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesWuhan, China
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Liu P, Zhao Y, Liu G, Wang M, Hu D, Hu J, Meng J, Reif JC, Zou J. Hybrid Performance of an Immortalized F 2 Rapeseed Population Is Driven by Additive, Dominance, and Epistatic Effects. FRONTIERS IN PLANT SCIENCE 2017; 8:815. [PMID: 28572809 PMCID: PMC5435766 DOI: 10.3389/fpls.2017.00815] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 05/01/2017] [Indexed: 05/19/2023]
Abstract
Genomics-based prediction of hybrid performance promises to boost selection gain. The main goal of our study was to investigate the relevance of additive, dominance, and epistatic effects for determining hybrid seed yield in a biparental rapeseed population. We re-analyzed 60,000 SNP array and seed yield data points from an immortalized F2 population comprised of 318 hybrids and 180 parental lines by performing genome-wide QTL mapping and predictions in combination with five-fold cross-validation. Moreover, an additional set of 37 hybrids were genotyped and phenotyped in an independent environment. The decomposition of the phenotypic variance components and the cross-validated results of the QTL mapping and genome-wide predictions revealed that the hybrid performance in rapeseed was driven by a mix of additive, dominance, and epistatic effects. Interestingly, the genome-wide prediction accuracy in the additional 37 hybrids remained high when modeling exclusively additive effects but was severely reduced when dominance or epistatic effects were also included. This loss in accuracy was most likely caused by more pronounced interactions of environments with dominance and epistatic effects than with additive effects. Consequently, the development of robust hybrid prediction models, including dominance and epistatic effects, required much deeper phenotyping in multi-environmental trials.
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Affiliation(s)
- Peifa Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural UniversityWuhan, China
| | - Yusheng Zhao
- Department of Breeding Research, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
| | - Guozheng Liu
- Department of Breeding Research, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
| | - Meng Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural UniversityWuhan, China
| | - Dandan Hu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural UniversityWuhan, China
| | - Jun Hu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural UniversityWuhan, China
| | - Jinling Meng
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural UniversityWuhan, China
| | - Jochen C. Reif
- Department of Breeding Research, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
- *Correspondence: Jochen C. Reif
| | - Jun Zou
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural UniversityWuhan, China
- Jun Zou
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