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ABSTRACT: Maize inbred lines sequencing

PROVIDER: PRJNA952945 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24124061_1.fastq.gz	Fastqsanger.gz
	SRR24124061_2.fastq.gz	Fastqsanger.gz
	SRR24124062_1.fastq.gz	Fastqsanger.gz
	SRR24124062_2.fastq.gz	Fastqsanger.gz
	SRR24124063_1.fastq.gz	Fastqsanger.gz

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Transcription factor binding divergence across maize inbred lines drives transcriptional and phenotypic variation

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Whole-transcriptome RNA sequencing and degradome sequencing were performed on maize inbred lines Chang7-2 (resistant to SCMV) and Mo17 (susceptible to SCMV).

Project description:The maize inbred lines Chang7-2 (resistant to SCMV) and Mo17 (susceptible to SCMV) were inoculated with SCMV (SC, SM) and phosphate buffer (MC, MM), respectively to subjected to whole-transcriptome RNA sequencing and degradome sequencing.

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Degradome sequencing were performed on maize inbred lines Chang7-2 (resistant to SCMV) and Mo17 (susceptible to SCMV).

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Maize Root system iTRAQ result under salt treatment

Project description:To acknowledge the molecular mechanisms underlying maize salt tolerance, two maize inbred lines, including salt-tolerant 8723 and salt-sensitive P138, were used in this study. Comparative proteomics of seedling roots from two maize inbred lines under 180 mM salt stress for 10 days was performed by the isobaric tags for relative and absolute quantitation (iTRAQ) approach. We obtained a total of 336237 spectra. 30616 peptides and a total of 7505 proteins were identified with 1% FDR. A total of 7505 differentially expressed proteins (DEPs) were identified. 626 DEPs were identified in line 8723 under salt stress, among them, 378 up-regulated and 248 down-regulated. 473 DEPs were identified in P138, of which 212 were up-regulated and 261 were down-regulated. Venn diagram analysis showed that 17 DEPs were up-regulated and 12 DEPs were down-regulated in the two inbred lines. In addition, 8 DEPs were up-regulated in line 8723 but down-regulated in P138, 6 DEPs were down-regulated in line 8723 but up-regulated in P138. In salt-stressed 8723, the DEPs were primarily associated with phenylpropanoid biosynthesis, starch and sucrose metabolism, and the MAPK signaling pathway. Intriguingly, the DEPs were only associated with the nitrogen metabolism pathway in P138. Compared to P138, the root response to salt stress in 8723 could maintain stronger water retention capacity, osmotic regulation ability, synergistic effects of antioxidant enzymes, energy supply capacity, signal transduction, ammonia detoxification ability, lipid metabolism, and nucleic acid synthesis. Based on the proteome sequencing information, changes in the abundance of 8 DEPs were correlated with the corresponding mRNA levels. Our results from this study may elucidate some details of salt tolerance mechanisms and salt tolerance breeding of maize.

2019-11-12 | PXD014409 | Pride

The maize methylome modulates mRNA splicing and reveals widespread paramutation guided by small RNA.

Project description:Methylation of chromosomal DNA in animals and plants is a fundamental mechanism of epigenetic regulation, and the maize genome, with its diverse complement of transposons and repeats, is a paradigm for transgenerational mechanisms such as paramutation and imprinting. We have determined the genome-wide cytosine methylation map of two maize inbred lines, B73 and Mo17, at high coverage and at single nucleotide resolution. Transposon methylation is highest in CG (65%) and CHG (50%) contexts (where H = A, C or T), while methylation in CHH (5%) contexts is guided by 24nt small interfering RNA (siRNA), and not by 21-22nt siRNA. We have found that CG (8%) methylation seems to deter insertion of Mutator transposons into exons, while CHH and CHG methylation at splice donor and acceptor sites strongly inhibits RNA splicing. Methylation differences between parents are inherited in recombinant inbred lines, but methylation switches, guided by siRNA, are widespread and persist for up to 8 generations. These differences influence splicing, and recurrent switching suggest that paramutation is much more common than previously supposed, and may contribute to heterosis. Our results provide a comprehensive high resolution resource for maize genome methylation, as well as a map of recurrent transgenerational epigenetic shifts (paramutation) in the two most commonly used inbred maize lines. Genome-wide cytosine methylation map in 2 maize strains by bisulfite sequencing, and RNA and small RNA profiles in the same tissue using Illumina platform.

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Project description:Profiles of primary metabolites in the shoots of juvenile maize inbred lines in the Goodman association panel were analyzed by GC-TOFMS to identify genetic components associated with metabolic control and plant performance. The samples also include those from landrace lines and maize wild relatives.

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Project description:we used mass spectrometto perform an integrated analysis of proteome e in an association panel consisting of 98 maize inbred lines.

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Heat-Resistant Inbred Lines Coordinate the Heat Response Genes Expression Remarkably in Maize

Project description:High temperature is increasingly becoming one of the prominent environmental factors affecting the growth and development of maize (Zea mays L.). Therefore, it is critical to identify key genes and pathways related to heat stress (HS) tolerance in maize. Here, we identified a heat-resistant (Z58D) and heat-sensitive (AF171) maize inbred lines at seedling stage. Transcriptomic analysis identified 3,006 differentially expressed genes (DEGs) in AF171 and 4,273 DEGs in Z58D under HS treatments, respectively. Subsequently, GO enrichment analysis showed that shared upregulated genes in AF171 and Z58D involved in response to HS, protein folding, abiotic and temperature stimulus pathway. Moreover, the comparison between the two inbred lines under HS showed that response to heat and response to temperature stimulus significantly overrepresented for the 1,234 upregulated genes. Furthermore, commonly upregulated genes in Z58D and AF171 had higher expression level in Z58D than AF171. In addition, maize inbred CIMBL55 had been verified to be more tolerant than B73 and commonly upregulated genes had higher expression level in CIMBL55 than B73 under HS. The consistent results indicated that heat-resistant inbred lines may coordinate the remarkable expression of genes in order to recover from HS. Additionally, 35 DEGs were conserved among 5 inbred lines by a comparative transcriptomic analysis. Most of them were more pronounced in Z58D than AF171 at expression level. Those candidate genes may confer thermotolerance in maize.

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