Ontology highlight
ABSTRACT:
PROVIDER: PRJNA394743 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5832610_1.fastq.gz | Fastqsanger.gz | |||
| SRR5832610_2.fastq.gz | Fastqsanger.gz | |||
| SRR5832620_1.fastq.gz | Fastqsanger.gz | |||
| SRR5832620_2.fastq.gz | Fastqsanger.gz | |||
| SRR5832611_1.fastq.gz | Fastqsanger.gz |
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Project description:Investigation of whole genome gene expression level changes in maize plants (standard maize line B73) in controlled conditions under continuous light. Tissues of the leaf elongation zone were sampled from plants well watered every 12 hours before and after lights on.
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Project description:RNA-seq from whole V3 maize seedlings (roots and shoots) for the B73 inbred line and A188 x B73 hybrid.
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Project description:Small RNAs (sRNAs) are hypothesized to contribute to hybrid vigor because they maintain genome integrity, contribute to genetic diversity, and control gene expression. We used Illumina sequencing to assess how sRNA populations vary between two maize inbred lines (B73, Mo17) and their hybrid. We sampled sRNAs from the seedling shoot apex and the developing ear, two rapidly growing tissues that program the greater growth of maize hybrids. We found that parental differences in siRNAs primarily originate from repeat regions. Although the maize genome contains greater number and complexity of repeats compared to Arabidopsis or rice, we confirmed that like these simpler plant genomes, 24-nt siRNAs whose abundance differs between maize parents also show a trend of downregulation following hybridization. Surprisingly, hybrid vigor is fully maintained when 24-nt siRNAs are globally reduced by mutation of the RNA-dependent RNA polymerase2 (RDR2) encoded by modifier of paramutation1 (mop1). We also discovered that 21-22nt siRNAs derived from a number of distinct retrotransposon families differentially accumulate between B73 and Mo17 as well as their hybrid. Thus, maize possesses a novel source of genetic variation for regulating both transposons and genes at a genomic scale, which may contribute to its high degree of observed heterosis.
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Project description:Investigation of whole genome gene expression level changes in maize plants (standard maize line B73) in controlled conditions under continuous light. Tissues of the leaf elongation zone were sampled from plants well watered every 12 hours before and after lights on. A nine chip (Biogemma Nimblegen Custom Array) study using total RNA recovered from three replicates (plants) sampled every 12 hours (1h before and 12 and 24h after lights on).
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Project description:In this research, we perofomred whole proteomic analysis of maize B73 in response to two viruses infection.
2018-12-11 | PXD012022 |
Project description:Genome-wide mapping of the TSS in root and shoot from two maize lines B73 and Mo17 Genome-wide locations and dynamics of maize core promoters obtained from the experimental establishment of the TSSs coordinates. The work derived from this data it is the first genome-wide atlas of core promoters and its dynamic generated for an important crop species. Four samples each one with biological replicates. Comparisons were done between B73 and Mo17 for each of the tissues and between tissues for each line
2015-11-04 | E-GEOD-70251 | biostudies-arrayexpress
Project description:Different individuals of the same species are generally thought to have very similar genomes. However, there is growing evidence that structural variation in the form of copy number variation (CNV) and presence-absence variation (PAV) can lead to variation in the genome content of individuals within a species. In order to investigate the potential contribution of CNV and PAV to genomic diversity in maize we used array comparative genomic hybridization (CGH) to compare gene content and copy number variation among 25 diverse maize inbreds 14 genotypes of the wild ancestor of maize, teosinte. The microarray included multiple probes for each of the ~32,500 stringently filtered genes identified in the B73 reference genome. We identified 479 genes exhibiting higher copy number in some genotypes (UpCNV) and 3,410 genes that have either fewer copies or are missing in the genome of at least one genotype relative to B73 (DownCNV/PAV). Many of these DownCNV/PAV are examples of genes that are present in B73 but missing from the genome of several other genotypes. Over 70% of the CNV/PAV examples are identified in multiple genotypes and the majority of events are observed in both maize and teosinte suggesting that these reflect relatively old variants that are not associated with domestication or maize improvement. Many of the genes affected by CNV/PAV are either maize-specific or members of genes families suggesting that the gene loss can be tolerated through buffering by redundant functions encoded elsewhere in the genome. Many plant genomes are relatively large and contain the remnant of whole genome duplications which may provide the ability to tolerate high levels of structural variation. While this structural variation may not result in major qualitative variation due to genetic buffering, it may significantly contribute to quantitative variation.
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