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Shikha K, Madhumal Thayil V, Shahi JP, Zaidi PH, Seetharam K, Nair SK, Singh R, Tosh G, Singamsetti A, Singh S, Sinha B. Genomic-regions associated with cold stress tolerance in Asia-adapted tropical maize germplasm. Sci Rep 2023; 13:6297. [PMID: 37072497 PMCID: PMC10113201 DOI: 10.1038/s41598-023-33250-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 04/10/2023] [Indexed: 05/03/2023] Open
Abstract
Maize is gaining impetus in non-traditional and non-conventional seasons such as off-season, primarily due to higher demand and economic returns. Maize varieties directed for growing in the winter season of South Asia must have cold resilience as an important trait due to the low prevailing temperatures and frequent cold snaps observed during this season in most parts of the lowland tropics of Asia. The current study involved screening of a panel of advanced tropically adapted maize lines to cold stress during vegetative and flowering stage under field conditions. A suite of significant genomic loci (28) associated with grain yield along and agronomic traits such as flowering (15) and plant height (6) under cold stress environments. The haplotype regression revealed 6 significant haplotype blocks for grain yield under cold stress across the test environments. Haplotype blocks particularly on chromosomes 5 (bin5.07), 6 (bin6.02), and 9 (9.03) co-located to regions/bins that have been identified to contain candidate genes involved in membrane transport system that would provide essential tolerance to the plant. The regions on chromosome 1 (bin1.04), 2 (bin 2.07), 3 (bin 3.05-3.06), 5 (bin5.03), 8 (bin8.05-8.06) also harboured significant SNPs for the other agronomic traits. In addition, the study also looked at the plausibility of identifying tropically adapted maize lines from the working germplasm with cold resilience across growth stages and identified four lines that could be used as breeding starts in the tropical maize breeding pipelines.
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Affiliation(s)
- Kumari Shikha
- Department of Genetics and Plant Breeding, Banaras Hindu University (BHU), Varanasi, India
| | - Vinayan Madhumal Thayil
- International Maize and Wheat Improvement Centre (CIMMYT), ICRISAT Campus, Patancheru, Telangana, India.
| | - J P Shahi
- Department of Genetics and Plant Breeding, Banaras Hindu University (BHU), Varanasi, India
| | - P H Zaidi
- International Maize and Wheat Improvement Centre (CIMMYT), ICRISAT Campus, Patancheru, Telangana, India
| | - Kaliyamoorthy Seetharam
- International Maize and Wheat Improvement Centre (CIMMYT), ICRISAT Campus, Patancheru, Telangana, India
| | - Sudha K Nair
- International Maize and Wheat Improvement Centre (CIMMYT), ICRISAT Campus, Patancheru, Telangana, India
| | - Raju Singh
- Borlaug Institute for South Asia (BISA), Ludhiana, Punjab, India
| | - Garg Tosh
- Punjab Agricultural University (PAU), Ludhiana, India
| | - Ashok Singamsetti
- Department of Genetics and Plant Breeding, Banaras Hindu University (BHU), Varanasi, India
| | - Saurabh Singh
- Department of Genetics and Plant Breeding, Banaras Hindu University (BHU), Varanasi, India
| | - B Sinha
- Department of Genetics and Plant Breeding, Banaras Hindu University (BHU), Varanasi, India
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Zhou Y, Lu Q, Ma J, Wang D, Li X, Di H, Zhang L, Hu X, Dong L, Liu X, Zeng X, Zhou Z, Weng J, Wang Z. Using a high density bin map to analyze quantitative trait locis of germination ability of maize at low temperatures. FRONTIERS IN PLANT SCIENCE 2022; 13:978941. [PMID: 36072324 PMCID: PMC9441762 DOI: 10.3389/fpls.2022.978941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
Low temperatures in the spring often lead to a decline in the emergence rate and uniformity of maize, which can affect yield in northern regions. This study used 365 recombinant inbred lines (RILs), which arose from crossing Qi319 and Ye478, to identify low-temperature resistance during the germination stage by measuring eight low-temperature-related traits. The quantitative trait locis (QTLs) were mapped using R/qtl software by combining phenotypic data, and the genotyping by sequencing (GBS) method to produce a high-density genetic linkage map. Twenty QTLs were detected during QTL mapping, of which seven QTLs simultaneously detected a consistent 197.10-202.30 Mb segment on chromosome 1. The primary segment was named cQTL1-2, with a phenotypic variation of 5.18-25.96% and a physical distance of 5.2 Mb. This combines the phenotype and genotype with the identification of seven chromosome segment substitution lines (CSSLs), which were derived from Ye478*Qi319 and related to cQTL1-2. The physical distance of cQTL1-2 was reduced to approximately 1.9 Mb. The consistent meta-QTL mQTL1 was located at 619.06 cM on chromosome 1, had a genetic distance of 7.27 cM, and overlapped with cQTL1-2. This was identified by combining the results of previous QTL studies assessing maize tolerance to low temperatures at the germination stage. An assessment of the results of the RIL population, CSSLs, and mQTL1 found the consistent QTL to be LtQTL1-1. It was identified in bin1.06-1.07 at a confidence interval of between 200,400,148 and 201,775,619 bp. In this interval, qRT-PCR found that relative expression of the candidate genes GRMZM2G082630 and GRMZM2G115730 were both up-regulated in low-temperature tolerant lines and down-regulated in sensitive lines (P < 0.01).
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Affiliation(s)
- Yu Zhou
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Qing Lu
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Jinxin Ma
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Dandan Wang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Xin Li
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Hong Di
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Lin Zhang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Xinge Hu
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Ling Dong
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Xianjun Liu
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Xing Zeng
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Zhiqiang Zhou
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jianfeng Weng
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhenhua Wang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
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3
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Xu Q, Wang X, Wang Y, Zhang H, Zhang H, Di H, Zhang L, Dong L, Zeng X, Liu X, Lee M, Wang Z, Zhou Y. Combined QTL mapping and RNA-Seq pro-filing reveal candidate genes related to low-temperature tolerance in maize. MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2022; 42:33. [PMID: 37312966 PMCID: PMC10248625 DOI: 10.1007/s11032-022-01297-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Maize (Zea mays L.) is the most important food crop in the world, with significant acreage and production across the globe. However, it is affected by low temperatures throughout its growth process, especially during germination. Therefore, it is important to identify more QTLs or genes associated with germination under low-temperature conditions. For the QTL analysis of traits related to low-temperature germination, we used a high-res genetic map of 213 lines of the intermated B73 × Mo17 (IBM) Syn10 doubled haploid (DH) population, which had 6618 bin markers. We detected 28 QTLs of eight phenotypic characteristics associated with low-temperature germination, while they explained the phenotypic contribution rate of 5.4 ~ 13.34%. Additionally, 14 overlapping QTLs produced six QTL clusters on every chromosome, except for 8 and 10. RNA-Seq found six genes related to low-temperature tolerance in these QTLs, while qRT-PCR analysis demonstrated that the expression trends of the Zm00001d045568 gene in the LT_BvsLT_M group and the CK_BvsCK_M group were highly significantly different at all four-time points (P < 0.01), and encoded the RING zinc finger protein. It was located on qRTL9-2 and qRSVI9-1 and is related to the total length and simple vitality index. These results provided potential candidate genes for further gene cloning and improving the low-temperature tolerance of maize. Supplementary Information The online version contains supplementary material available at 10.1007/s11032-022-01297-6.
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Affiliation(s)
- Qingyu Xu
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Xuerui Wang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Yuhe Wang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Hong Zhang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Hongzhou Zhang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Hong Di
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Lin Zhang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Ling Dong
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Xing Zeng
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Xianjun Liu
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Michael Lee
- Department of Agronomy, Iowa State University, Ames, IA 50011 USA
| | - Zhenhua Wang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
| | - Yu Zhou
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Department of Agriculture, Northeast Agricultural University, HarbinHeilongjiang, 150030 China
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4
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Han Q, Zhu Q, Shen Y, Lee M, Lübberstedt T, Zhao G. QTL Mapping Low-Temperature Germination Ability in the Maize IBM Syn10 DH Population. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11020214. [PMID: 35050102 PMCID: PMC8780824 DOI: 10.3390/plants11020214] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 12/16/2021] [Accepted: 12/20/2021] [Indexed: 05/04/2023]
Abstract
Chilling injury poses a serious threat to seed emergence of spring-sowing maize in China, which has become one of the main climatic limiting factors affecting maize production in China. It is of great significance to mine the key genes controlling low-temperature tolerance during seed germination and study their functions for breeding new maize varieties with strong low-temperature tolerance during germination. In this study, 176 lines of the intermated B73 × Mo17 (IBM) Syn10 doubled haploid (DH) population, which comprised 6618 bin markers, were used for QTL analysis of low-temperature germination ability. The results showed significant differences in germination related traits under optimum-temperature condition (25 °C) and low-temperature condition (10 °C) between two parental lines. In total, 13 QTLs were detected on all chromosomes, except for chromosome 5, 7, 10. Among them, seven QTLs formed five QTL clusters on chromosomes 1, 2, 3, 4, and 9 under the low-temperature condition, which suggested that there may be some genes regulating multiple germination traits at the same time. A total of 39 candidate genes were extracted from five QTL clusters based on the maize GDB under the low-temperature condition. To further screen candidate genes controlling low-temperature germination, RNA-Seq, in which RNA was extracted from the germination seeds of B73 and Mo17 at 10 °C, was conducted, and three B73 upregulated genes and five Mo17 upregulated genes were found by combined analysis of RNA-Seq and QTL located genes. Additionally, the variations of Zm00001d027976 (GLABRA2), Zm00001d007311 (bHLH transcription factor), and Zm00001d053703 (bZIP transcription factor) were found by comparison of amino sequence between B73 and Mo17. This study will provide a theoretical basis for marker-assisted breeding and lay a foundation for further revealing molecular mechanism of low-temperature germination tolerance in maize.
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Affiliation(s)
- Qinghui Han
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Science, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China; (Q.H.); (Q.Z.); (Y.S.)
| | - Qingxiang Zhu
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Science, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China; (Q.H.); (Q.Z.); (Y.S.)
| | - Yao Shen
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Science, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China; (Q.H.); (Q.Z.); (Y.S.)
| | - Michael Lee
- Department of Agronomy, Iowa State University, Ames, IA 50011, USA; (M.L.); (T.L.)
| | - Thomas Lübberstedt
- Department of Agronomy, Iowa State University, Ames, IA 50011, USA; (M.L.); (T.L.)
| | - Guangwu Zhao
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Science, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China; (Q.H.); (Q.Z.); (Y.S.)
- Correspondence:
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5
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Yi Q, Álvarez-Iglesias L, Malvar RA, Romay MC, Revilla P. A worldwide maize panel revealed new genetic variation for cold tolerance. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2021; 134:1083-1094. [PMID: 33582854 DOI: 10.1007/s00122-020-03753-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/12/2020] [Indexed: 05/21/2023]
Abstract
A large association panel of 836 maize inbreds revealed a broader genetic diversity of cold tolerance, as predominantly favorable QTL with small effects were identified, indicating that genomic selection is the most promising option for breeding maize for cold tolerance. Maize (Zea mays L.) has limited cold tolerance, and breeding for cold tolerance is a noteworthy bottleneck for reaching the high potential of maize production in temperate areas. In this study, we evaluate a large panel of 836 maize inbred lines to detect genetic loci and candidate genes for cold tolerance at the germination and seedling stages. Genetic variation for cold tolerance was larger than in previous reports with moderately high heritability for most traits. We identified 187 significant single-nucleotide polymorphisms (SNPs) that were integrated into 159 quantitative trait loci (QTL) for emergence and traits related to early growth. Most of the QTL have small effects and are specific for each environment, with the majority found under control conditions. Favorable alleles are more frequent in 120 inbreds including all germplasm groups, but mainly from Minnesota and Spain. Therefore, there is a large, potentially novel, genetic variability in the germplasm groups represented by these inbred lines. Most of the candidate genes are involved in metabolic processes and intracellular membrane-bounded organelles. We expect that further evaluations of germplasm with broader genetic diversity could identify additional favorable alleles for cold tolerance. However, it is not likely that further studies will find favorable alleles with large effects for improving cold tolerance in maize.
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Affiliation(s)
- Q Yi
- Misión Biológica de Galicia (CSIC), Apartado 28, E-36080, Pontevedra, Spain
- College of Agriculture, Guizhou University, Guiyang, 550025, China
| | - L Álvarez-Iglesias
- Misión Biológica de Galicia (CSIC), Apartado 28, E-36080, Pontevedra, Spain
| | - R A Malvar
- Misión Biológica de Galicia (CSIC), Apartado 28, E-36080, Pontevedra, Spain
| | - M C Romay
- Institute for Genomic Diversity, Cornell University, Ithaca, NY14853, USA
| | - Pedro Revilla
- Misión Biológica de Galicia (CSIC), Apartado 28, E-36080, Pontevedra, Spain.
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Ghaleb W, Barre P, Teulat B, Ahmed LQ, Escobar-Gutiérrez AJ. Divergent Selection for Seed Ability to Germinate at Extreme Temperatures in Perennial Ryegrass ( Lolium perenne L.). FRONTIERS IN PLANT SCIENCE 2021; 12:794488. [PMID: 35173750 PMCID: PMC8841656 DOI: 10.3389/fpls.2021.794488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/14/2021] [Indexed: 05/03/2023]
Abstract
Various adaptive mechanisms can ensure that seedlings are established at the most favourable time and place. These mechanisms include seed dormancy i.e., incapacity to germinate in any environment without a specific environmental trigger and inhibition i.e., incapacity to germinate in an unfavourable environment (water availability, temperature: thermoinhibition and light). The objective of this research was to study in the temperate range for germination of forage and turf grass species perennial ryegrass, if the thermal requirements for germination are under genetic controlled and could be selectively bred. Two divergent selections of three cycles were realized on a natural population: one to select for the capacity to germinate at 10°C vs. the impossibility to germinate at 10°C, and one to select for the capacity to germinate at 32°C vs. the impossibility to germinate at 32°C. Seeds of all the lots obtained from the two divergent selections were then germinated at constant temperatures from 5 to 35°C to evaluate their germination ability. Concerning the positive selection, the first cycle of positive selection at 10°C was highly efficient with a very strong increase in the germination percentage. However, afterward no selection effect was observed during the next two cycles of positive selection. By contrast, the positive selection at 32°C was efficient during all cycles with a linear increase of the percentage of germination at 32°C. Concerning the negative selection, we observed only a large positive effect of the first cycle of selection at 10°C. These findings demonstrate that seed thermoinhibition at 10 and 32°C observed in a natural population of perennial ryegrass has a genetic basis and a single recessive gene seems to be involved at 10°C.
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Affiliation(s)
- Wagdi Ghaleb
- INRAE, URP3F, F-86600 Lusignan, France
- Biotechnology Research Center (BTRC), Tripoli, Libya
| | - Philippe Barre
- INRAE, URP3F, F-86600 Lusignan, France
- *Correspondence: Philippe Barre,
| | - Béatrice Teulat
- Univ. Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France
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Costa Silva Neta I, Vilela de Resende Von Pinho É, de Abreu VM, Rezende Vilela D, Santos MC, Oliveira Dos Santos H, Diniz Cabral Ferreira RA, Garcia Von Pinho R, Coelho de Castro Vasconcellos R. Gene expression and genetic control to cold tolerance during maize seed germination. BMC PLANT BIOLOGY 2020; 20:188. [PMID: 32349671 PMCID: PMC7191758 DOI: 10.1186/s12870-020-02387-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 04/06/2020] [Indexed: 05/27/2023]
Abstract
BACKGROUND The study of cold tolerance in maize seeds and seedlings through physiological quality assessments, as well as the genetic control associated with this trait, allows an early characterization of genotypes. Here we studied the genetic control for cold tolerance during the germination process in maize seeds and genes influenced by this stress. RESULTS Six maize lines were used, three classified as tolerant and three as susceptible to low germination temperature. A field was developed to produce the hybrid seeds, in a partial diallel scheme including the reciprocal crosses. For the expression analysis, seeds from two contrasting lines were used, as well as their hybrid combination and their reciprocal crosses, on dried and moistened seeds at 10 °C for 4 and 7 days. It was evaluated the catalase (CAT) and esterase (EST) enzymes, heat-resistant proteins and the genes Putative stearoyl-ACP desaturase (SAD), Ascorbate Peroxidase (APX), Superoxide Dismutase (SOD) and Mitogen Activated Protein Kinase (ZmMPK5). The estimated values for heterosis, general and specific combining abilities and reciprocal maternal and non-maternal effects were carried out and it showed that there is heterosis for germination at low temperatures, also the non-additive genes were more important and there was a reciprocal effect. CONCLUSIONS There is a greater expression of the CAT and EST enzymes in moistened seeds at seven days and there is less expression of heat-resistant proteins and the SAD gene at seven days of moistening. Also, there are variations in the expression of the APX, SOD and ZmMPK5 genes in dried and moistened seeds, as well as among the genotypes studied.
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Modulation of early maize seedling performance via priming under sub-optimal temperatures. PLoS One 2018; 13:e0206861. [PMID: 30395595 PMCID: PMC6218074 DOI: 10.1371/journal.pone.0206861] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/19/2018] [Indexed: 11/19/2022] Open
Abstract
Seeds planted in early spring frequently experience low temperature stress in the soil during germination and early plant growth. Seed pretreatments such as priming have been shown to ameliorate the negative effects of cold soil in some crops. However, the potential beneficial effects of priming have not been widely investigated for Zea mays (maize). To investigate seed priming effects, 24 diverse maize inbred lines were primed using a synthetic solid matrix, Micro-Cel E, and then exposed to 10°C soil conditions. Six DSLR cameras captured time lapsed images of emerging seedlings. Manual scoring was used to determine treatment effects on three seedling emergence metrics. Chilling substantially reduced total emergence for two of 24 genotypes evaluated. For these genotypes, priming provided protection allowing nearly full emergence. Priming significantly reduced mean emergence time and increased the emergence uniformity of chilling sensitive genotypes. The results suggest that the cold sensitive genotypes may benefit from priming pretreatment. Kernel density, weight, oil, protein, and starch traits, as determined by single-kernel near infrared spectroscopy, were not correlated with seedling emergence traits supporting a conclusion that early seedling performance cannot be determined from these maize kernel characteristics.
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Calzadilla PI, Signorelli S, Escaray FJ, Menéndez AB, Monza J, Ruiz OA, Maiale SJ. Photosynthetic responses mediate the adaptation of two Lotus japonicus ecotypes to low temperature. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 250:59-68. [PMID: 27457984 DOI: 10.1016/j.plantsci.2016.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 06/02/2016] [Accepted: 06/02/2016] [Indexed: 05/09/2023]
Abstract
Lotus species are important forage legumes due to their high nutritional value and adaptability to marginal conditions. However, the dry matter production and regrowth rate of cultivable Lotus spp. is drastically reduced during colder seasons. In this work, we evaluated the chilling response of Lotus japonicus ecotypes MG-1 and MG-20. No significant increases were observed in reactive oxygen species and nitric oxide production or in lipid peroxidation, although a chilling-induced redox imbalance was suggested through NADPH/NADP(+) ratio alterations. Antioxidant enzyme catalase, ascorbate peroxidase, and superoxide dismutase activities were also measured. Superoxide dismutase, in particular the chloroplastic isoform, showed different activity for different ecotypes and treatments. Stress-induced photoinhibition also differentially influenced both ecotypes, with MG-1 more affected than MG-20. Data showed that the D2 PSII subunit was more affected than D1 after 1 d of low temperature exposure, although its protein levels recovered over the course of the experiment. Interestingly, D2 recovery was accompanied by improvements in photosynthetic parameters (Asat and Fv/Fm) and the NADPH/NADP(+) ratio. Our results suggest that the D2 protein is involved in the acclimation response of L. japonicus to low temperature. This may provide a deeper insight into the chilling tolerance mechanisms of the Lotus genus.
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Affiliation(s)
- Pablo Ignacio Calzadilla
- UB1, Instituto de Investigaciones Biotecnológicas, Instituto Tecnológico de Chascomús, UNSAM-CONICET, Chascomús, Argentina.
| | - Santiago Signorelli
- Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; School of Plant Biology and the UWA Institute of Agriculture, University of Western Australia, Perth, Australia.
| | - Francisco Jose Escaray
- UB1, Instituto de Investigaciones Biotecnológicas, Instituto Tecnológico de Chascomús, UNSAM-CONICET, Chascomús, Argentina.
| | - Ana Bernardina Menéndez
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, PROPLAME-PRHIDEB (CONICET), Buenos Aires, Argentina.
| | - Jorge Monza
- Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay.
| | - Oscar Adolfo Ruiz
- UB1, Instituto de Investigaciones Biotecnológicas, Instituto Tecnológico de Chascomús, UNSAM-CONICET, Chascomús, Argentina.
| | - Santiago Javier Maiale
- UB1, Instituto de Investigaciones Biotecnológicas, Instituto Tecnológico de Chascomús, UNSAM-CONICET, Chascomús, Argentina.
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10
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Revilla P, Rodríguez VM, Ordás A, Rincent R, Charcosset A, Giauffret C, Melchinger AE, Schön CC, Bauer E, Altmann T, Brunel D, Moreno-González J, Campo L, Ouzunova M, Álvarez Á, Ruíz de Galarreta JI, Laborde J, Malvar RA. Association mapping for cold tolerance in two large maize inbred panels. BMC PLANT BIOLOGY 2016; 16:127. [PMID: 27267760 PMCID: PMC4895824 DOI: 10.1186/s12870-016-0816-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 05/20/2016] [Indexed: 05/19/2023]
Abstract
BACKGROUND Breeding for cold tolerance in maize promises to allow increasing growth area and production in temperate zones. The objective of this research was to conduct genome-wide association analyses (GWAS) in temperate maize inbred lines and to find strategies for pyramiding genes for cold tolerance. Two panels of 306 dent and 292 European flint maize inbred lines were evaluated per se and in testcrosses under cold and control conditions in a growth chamber. We recorded indirect measures for cold tolerance as the traits number of days from sowing to emergence, relative leaf chlorophyll content or quantum efficiency of photosystem II. Association mapping for identifying genes associated to cold tolerance in both panels was based on genotyping with 49,585 genome-wide single nucleotide polymorphism (SNP) markers. RESULTS We found 275 significant associations, most of them in the inbreds evaluated per se, in the flint panel, and under control conditions. A few candidate genes coincided between the current research and previous reports. A total of 47 flint inbreds harbored the favorable alleles for six significant quantitative trait loci (QTL) detected for inbreds per se evaluated under cold conditions, four of them had also the favorable alleles for the main QTL detected from the testcrosses. Only four dent inbreds (EZ47, F924, NK807 and PHJ40) harbored the favorable alleles for three main QTL detected from the evaluation of the dent inbreds per se under cold conditions. There were more QTL in the flint panel and most of the QTL were associated with days to emergence and ΦPSII. CONCLUSIONS These results open new possibilities to genetically improve cold tolerance either with genome-wide selection or with marker assisted selection.
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Affiliation(s)
- Pedro Revilla
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain.
| | - Víctor Manuel Rodríguez
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain
| | - Amando Ordás
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain
| | - Renaud Rincent
- INRA, UMR de Génétique Végétale/Université Paris-Sud - CNRS - AgroParisTech, Gif-sur-Yvette, France
| | - Alain Charcosset
- INRA, UMR de Génétique Végétale/Université Paris-Sud - CNRS - AgroParisTech, Gif-sur-Yvette, France
| | - Catherine Giauffret
- UMR INRA/USTL 1281 Stress Abiotiques et Différenciation des Végetaux cultivés, Péronne, France
| | - Albrecht E Melchinger
- Institute of Plant Breeding, Seed Science and Population Genetics, Universität Hohenheim, Stuttgart, Germany
| | | | - Eva Bauer
- Plant Breeding, Technische Universität München, Freising, Germany
| | - Thomas Altmann
- Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | | | | | - Laura Campo
- Centro Investigacións Agrarias Mabegondo (CIAM), A Coruña, Spain
| | | | - Ángel Álvarez
- Estación Experimental de Aula Dei (CSIC), Saragossa, Spain
| | | | | | - Rosa Ana Malvar
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain
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Hu S, Lübberstedt T, Zhao G, Lee M. QTL Mapping of Low-Temperature Germination Ability in the Maize IBM Syn4 RIL Population. PLoS One 2016; 11:e0152795. [PMID: 27031623 PMCID: PMC4816396 DOI: 10.1371/journal.pone.0152795] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 03/18/2016] [Indexed: 11/18/2022] Open
Abstract
Low temperature is the primary factor to affect maize sowing in early spring. It is, therefore, vital for maize breeding programs to improve tolerance to low temperatures at seed germination stage. However, little is known about maize QTL involved in low-temperature germination ability. 243 lines of the intermated B73×Mo17 (IBM) Syn4 recombinant inbred line (RIL) population was used for QTL analysis of low-temperature germination ability. There were significant differences in germination-related traits under both conditions of low temperature (12°C/16h, 18°C/8h) and optimum temperature (28°C/24h) between the parental lines. Only three QTL were identified for controlling optimum-temperature germination rate. Six QTL controlling low-temperature germination rate were detected on chromosome 4, 5, 6, 7 and 9, and contribution rate of single QTL explained between 3.39%~11.29%. In addition, six QTL controlling low-temperature primary root length were detected in chromosome 4, 5, 6, and 9, and the contribution rate of single QTL explained between 3.96%~8.41%. Four pairs of QTL were located at the same chromosome position and together controlled germination rate and primary root length under low temperature condition. The nearest markers apart from the corresponding QTL (only 0.01 cM) were umc1303 (265.1 cM) on chromosome 4, umc1 (246.4 cM) on chromosome 5, umc62 (459.1 cM) on chromosome 6, bnl14.28a (477.4 cM) on chromosome 9, respectively. A total of 3155 candidate genes were extracted from nine separate intervals based on the Maize Genetics and Genomics Database (http://www.maizegdb.org). Five candidate genes were selected for analysis as candidates putatively affecting seed germination and seedling growth at low temperature. The results provided a basis for further fine mapping, molecular marker assisted breeding and functional study of cold-tolerance at the stage of seed germination in maize.
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Affiliation(s)
- Shuaidong Hu
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agriculture and Forestry University, Lin’an, 311300, Zhejiang, China
| | - Thomas Lübberstedt
- Department of Agronomy, Iowa State University, Ames, IA, 50011, United States of America
| | - Guangwu Zhao
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agriculture and Forestry University, Lin’an, 311300, Zhejiang, China
- * E-mail:
| | - Michael Lee
- Department of Agronomy, Iowa State University, Ames, IA, 50011, United States of America
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12
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Kawamura K, Kawanabe T, Shimizu M, Nagano AJ, Saeki N, Okazaki K, Kaji M, Dennis ES, Osabe K, Fujimoto R. Genetic distance of inbred lines of Chinese cabbage and its relationship to heterosis. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.plgene.2015.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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