Microarray analysis of a hybrid weakness in the cross between rice cultivars
Ontology highlight
ABSTRACT:
ORGANISM(S): Oryza sativa Oryza sativa Japonica Group
PROVIDER: GSE15755 | GEO | 2016/04/12
SECONDARY ACCESSION(S): PRJNA116781
REPOSITORIES: GEO
Similar Datasets
Project description:Hybrid weakness is a type of reproductive barrier found in many plant species and is important to plant evolution. Compared with heterosis, hybrid weakness has received less attention in evolutionary genetics studies. In rice, the hybrid weakness of the F1 progenies between the Jamaica- and temperate Japonica-types has been intensively genetically surveyed, and it has been found to be controlled by two complementary genes, Hwc1 and Hwc2. The defective development of the hybrid F1 seedlings was found to be mainly due to abnormal root growth, resulting in non-continuous growth and the eventual lethality of the plants. Detailed genome-wide analyses using the hybrid F1 plant and parents showed that, in contrast to heterosis, in which photosynthesis- and starch metabolism-related genes are preferentially expressed, the abscisic acid (ABA)-response and abiotic-/biotic- and defense-related genes were significantly up-regulated in the roots of the hybrid F1, resulting in suppressed growth of the whole plant. This indicates that the mechanisms of heterosis and hybrid weakness differ and provides informative clues to facilitate the understanding of the mechanisms controlling the reproductive isolation and hybrid weakness.
2015-02-03 | GSE24977 | GEO
Project description:Reproductive barriers perform a vital role during speciation. Hybrid weakness, the poor development of hybrids compared to their parents, hinders gene exchange between different species at the postzygotic stage. The molecular and evolutionary mechanisms of hybrid weakness are poorly understood. Here, we report that two incompatible dominant loci (Hwi1 and Hwi2) involving three genes determine the high temperature-dependent expression of hybrid weakness in interspecific hybrids of rice. Hwi1 comprises two indispensable wild rice (Oryza rufipogon)-specific leucine-rich repeat receptor-like kinase (LRR-RLK) genes, 25L1 and 25L2, for inducing hybrid weakness, and the genes possibly undergo balancing selection. Hwi2, a rare allele that is predominantly distributed in indica rice (Oryza sativa), encodes a secreted putative subtilisin-like protease. Functional analysis indicated that pyramiding of Hwi1 and Hwi2 activates the autoimmune response in the basal nodes of hybrids, interrupting root formation and then impairing shoot growth, likely due to immune signal is transmitted from the basal nodes to the above-ground parts. Considering the nature of RLK activity of Hwi1 and the protease activity of Hwi2, we propose that a certain endogenous signaling molecule produced by Hwi2 is perceived by Hwi1 to activate autoimmunity through ligand-receptor signal transduction. These findings bring new insights into our understanding of reproductive isolation and may benefit rice breeding to maximally utilize invaluable genes from wild rice. We conducted microarray analysis to unravel the global changes in gene expression of a pair of NILs (nearly isogenic lines).
2014-01-22 | GSE54243 | GEO
Project description:Reproductive barriers perform a vital role during speciation1. Hybrid weakness, the poor development of hybrids compared to their parents, hinders gene exchange between different species at the postzygotic stage2,3. The molecular and evolutionary mechanisms of hybrid weakness are poorly understood2. Here, we report that two incompatible dominant loci (Hwi1 and Hwi2) involving three genes determine the high temperature-dependent expression of hybrid weakness in interspecific hybrids of rice. Hwi1 comprises two indispensable wild rice (Oryza rufipogon)-specific leucine-rich repeat receptor-like kinase (LRR-RLK) genes, 25L1 and 25L2, for inducing hybrid weakness, and the genes possibly undergo balancing selection. Hwi2, a rare allele that is predominantly distributed in indica rice (Oryza sativa), encodes a secreted putative subtilisin-like protease. Functional analysis indicated that pyramiding of Hwi1 and Hwi2 activates the autoimmune response in the basal nodes of hybrids, interrupting root formation and then impairing shoot growth, likely due to immune signal is transmitted from the basal nodes to the above-ground parts. Considering the nature of RLK activity of Hwi1 and the protease activity of Hwi2, we propose that a certain endogenous signaling molecule produced by Hwi2 is perceived by Hwi1 to activate autoimmunity through ligand-receptor signal transduction. These findings bring new insights into our understanding of reproductive isolation and may benefit rice breeding to maximally utilize invaluable genes from wild rice. We conducted microarray analysis to unravel the global changes in gene expression of a pair of NILs (nearly isogenic lines). Plants were cultivated at constant 20°C for 20 days and then shifted to constant 30°C conditions. The basal nodes of NIL(Hwi1) and NIL(hwi1) were harvested immediately before the temperature shift (set as the 0 point) or at 3, 7 or 15 days after the shift. Three biological replicates (each comprising basal nodes from 15–20 individuals) were used for each time point.
2014-01-22 | E-GEOD-54243 | biostudies-arrayexpress
Project description:Hybrid weakness is an important post zygotic reproductive barrier between natural populations. Expression of hybrid weakness can lead to significant decrease in yield and even lethality and is thus an undesirable agronomic trait. We observed that F1 hybrids produced from crossing between any two of three Japonica varieties(CH7, CH8, CH9) exhibit hybrid weakness phenotype. Exploring the molecular mechanism underlying hybrid weakness in important crops like rice is worthy. We used microarrays to obtain a global picture of gene expression changes that occurred in the F1 hybrids with characteristic hybrid weakness phenotype.
2018-12-01 | GSE119431 | GEO
Project description:Heterosis is an important biological phenomenon; however, the role of small RNA (sRNA) in heterosis of hybrid rice remains poorly described. Here, we performed sRNA profiling of F1 super-hybrid rice LYP9 and its parents using high-throughput sequencing technology, and identified 355 distinct mature microRNAs and trans-acting small interfering RNAs, 69 of which were differentially expressed sRNAs (DES) between the hybrid and the mid-parental value. Among these, 34 DES were predicted to target 176 transcripts, of which 112 encoded 94 transcription factors. Further analysis showed that 67.6% of DES expression levels were negatively correlated with their target mRNAs either in flag leaves or panicles. The target genes of DES were significantly enriched in some important biological processes, including the auxin signalling pathway, in which existed a regulatory network mediated by DES and their targets, closely associated with plant growth and development. Overall, 20.8% of DES and their target genes were significantly enriched in quantitative trait loci of small intervals related to important rice agronomic traits including growth vigour, grain yield, and plant architecture, suggesting that the interaction between sRNAs and their targets contributes to the heterotic phenotypes of hybrid rice. Our findings revealed that sRNAs might play important roles in hybrid vigour of super-hybrid rice by regulating their target genes, especially in controlling the auxin signalling pathway. The above finding provides a novel insight into the molecular mechanism of heterosis. We constructed six sRNA sequencing libraries and six mRNA sequencing libraries of flag leaves and panicles of the super-hybrid rice Liangyou-pei9 (LYP9) combination at the grain-filling stage. The above hybrid rice combination includes F1 hybrid LYP9 and its parental lines including the male-sterile line Peiai64s (PA64s) and the restorer line 93-11.
2014-08-17 | E-GEOD-51468 | biostudies-arrayexpress
Project description:F1 hybrids can outperform their parents in yield and vegetative biomass, features of hybrid vigor which form the basis of the hybrid seed industry. The yield advantage of the F1 is lost in the F2 and subsequent generations. In Arabidopsis, from F2 plants which have a F1 –like phenotype, we have by recurrent selection produced pure breeding F5/F6 lines “Hybrid Mimics”, in which the characteristics of the F1 Hybrid are stabilized. These Hybrid Mimic lines, like the F1 Hybrid, have larger leaves than the parent plant, the leaves having increased photosynthetic cell numbers, and in some lines increased size of cells, suggesting an increased supply of photosynthate. A comparison of the differentially expressed genes in the F1 Hybrid with those of eight Hybrid Mimic lines has identified metabolic pathways altered in both; these pathways include down regulation of defense response pathways and altered abiotic response pathways. F6 Hybrid Mimic lines are mostly homozygous at each locus in the genome yet retain the large F1-like phenotype. Many alleles in the F6 plants, when they are homozygous, have expression levels different to the level in the parent. We consider this altered expression to be a consequence of trans-regulation of genes from one parent by genes from the other parent. Transregulation could also arise from epigenetic modifications in the F1. The pure breeding Hybrid Mimics have been valuable in probing the mechanisms of hybrid vigor and may also prove to be useful hybrid vigor equivalents in agriculture.
2015-08-17 | GSE64742 | GEO
Project description:F1 hybrids can outperform their parents in yield and vegetative biomass, features of hybrid vigor which form the basis of the hybrid seed industry. The yield advantage of the F1 is lost in the F2 and subsequent generations. In Arabidopsis, from F2 plants which have a F1 –like phenotype, we have by recurrent selection produced pure breeding F5/F6 lines “Hybrid Mimics”, in which the characteristics of the F1 Hybrid are stabilized. These Hybrid Mimic lines, like the F1 Hybrid, have larger leaves than the parent plant, the leaves having increased photosynthetic cell numbers, and in some lines increased size of cells, suggesting an increased supply of photosynthate. A comparison of the differentially expressed genes in the F1 Hybrid with those of eight Hybrid Mimic lines has identified metabolic pathways altered in both; these pathways include down regulation of defense response pathways and altered abiotic response pathways. F6 Hybrid Mimic lines are mostly homozygous at each locus in the genome yet retain the large F1-like phenotype. Many alleles in the F6 plants, when they are homozygous, have expression levels different to the level in the parent. We consider this altered expression to be a consequence of trans-regulation of genes from one parent by genes from the other parent. Transregulation could also arise from epigenetic modifications in the F1. The pure breeding Hybrid Mimics have been valuable in probing the mechanisms of hybrid vigor and may also prove to be useful hybrid vigor equivalents in agriculture.
2015-08-17 | GSE64740 | GEO
Project description:Based our serial analysis of gene expression (SAGE) data from an elite Chinese super-hybrid rice (LYP9) and its parental cultivars (93-11 and PA64s) in three major tissue types at three different developmental stages, we obtained a much more comprehensive view of genes that related to rice heterosis and analyzed the potential effects of gene-expression difference on the heterosis of rice.These heterotic expression genes among different genotypes provided new avenues for exploring the molecular mechanisms underlying heterosis, including variable gene expression patterns. Keywords: Heterosis study by SAGE We constructed nine SAGE libraries parallelly, including root at the first tillering stage, leaf at the milky stage of rice grain maturation, and panicle at the pollen-maturing stage of hybrid rice (LYP9) and its paternal lines (9311, PA64s).
2007-06-07 | E-GEOD-8048 | biostudies-arrayexpress
Project description:Heterosis is an important biological phenomenon; however, the role of small RNA (sRNA) in heterosis of hybrid rice remains poorly described. Here, we performed sRNA profiling of F1 super-hybrid rice LYP9 and its parents using high-throughput sequencing technology, and identified 355 distinct mature microRNAs and trans-acting small interfering RNAs, 69 of which were differentially expressed sRNAs (DES) between the hybrid and the mid-parental value. Among these, 34 DES were predicted to target 176 transcripts, of which 112 encoded 94 transcription factors. Further analysis showed that 67.6% of DES expression levels were negatively correlated with their target mRNAs either in flag leaves or panicles. The target genes of DES were significantly enriched in some important biological processes, including the auxin signalling pathway, in which existed a regulatory network mediated by DES and their targets, closely associated with plant growth and development. Overall, 20.8% of DES and their target genes were significantly enriched in quantitative trait loci of small intervals related to important rice agronomic traits including growth vigour, grain yield, and plant architecture, suggesting that the interaction between sRNAs and their targets contributes to the heterotic phenotypes of hybrid rice. Our findings revealed that sRNAs might play important roles in hybrid vigour of super-hybrid rice by regulating their target genes, especially in controlling the auxin signalling pathway. The above finding provides a novel insight into the molecular mechanism of heterosis.
2014-08-17 | GSE51468 | GEO
Project description:To obtain new insights for heterosis mechanisms in Arabidopsis, transcript profiling of arabidopsis F1 hybrid and their parentral lines was obtained from Affymetrix GeneChips ATH array. The microarray analysis exhibited that there were 44 up-regulated and 12 down-regulated genes with more than a 1.5-fold changes in the profiles of F1 hybrid against those of each parent. Gene ontology analyses highlighted up-regulated genes as organic nitrogen-related in the F1 hybrid.
2021-06-30 | GSE160630 | GEO