排序方式: 共有76条查询结果,搜索用时 337 毫秒
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Charlene P Wight Nicholas A Tinker Shahryar F Kianian Mark E Sorrells Louise S O'Donoughue David L Hoffman Susanne Groh Graham J Scoles Cheng Dao Li Francis H Webster Ronald L Phillips Howard W Rines Suzanne M Livingston Kenneth C Armstrong George Fedak Stephen J Molnar 《Génome》2003,46(1):28-47
Molecular mapping of cultivated oats was conducted to update the previous reference map constructed using a recombinant inbred (RI) population derived from Avena byzantina C. Koch cv. Kanota x Avena sativa L. cv. Ogle. In the current work, 607 new markers were scored, many on a larger set of RI lines (133 vs. 71) than previously reported. A robust, updated framework map was developed to resolve linkage associations among 286 markers. The remaining 880 markers were placed individually within the most likely framework interval using chi2 tests. This molecular framework incorporates and builds on previous studies, including physical mapping and linkage mapping in additional oat populations. The resulting map provides a common tool for use by oat researchers concerned with structural genomics, functional genomics, and molecular breeding. 相似文献
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Maryam Pilehchian Langroudi Novin Nikbakhsh Ali Akbar Samadani Sadegh Fattahi Hassan Taheri Shahryar Shafaei Galia Amirbozorgi Reza Pilehchian Langroudi Haleh Akhavan-Niaki 《Journal of cell communication and signaling》2017,11(1):69-75
Gastric cancer is one of the major causes of death due to cancer in the world. It is a multi-factorial disease with epigenetic factors being also involved in its development. FAT4 is a tumor suppressor gene exerting an important role in cell adhesion. This study aimed at analyzing FAT4 expression and promoter methylation in gastric cancer. FAT4 expression was studied in 30 tumoral tissues and their non-tumoral counterparts using Taqman real time PCR method. Promoter methylation was assessed using bisulfite conversion method followed by sequencing. Tumor tissues showed reduced FAT4 expression (P = 0.04). FAT4 downregulation was associated with tumor grade, with higher repression at advanced grades. Significant increase of promoter methylation was observed in tumoral tissues. Reduced expression of FAT4 and increased methylation of its promoter may be one of the effective processes in turning a healthy stomach tissue into a tumor tissue. 相似文献
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Fast‐forward genetics by radiation hybrids to saturate the locus regulating nuclear–cytoplasmic compatibility in Triticum 下载免费PDF全文
Filippo M. Bassi Farhad Ghavami Matthew J. Hayden Yi Wang Kerrie L. Forrest Stephan Kong Rhoderissa Dizon Monika K. Michalak de Jimenez Steven W. Meinhardt Mohamed Mergoum Yong Q. Gu Shahryar F. Kianian 《Plant biotechnology journal》2016,14(8):1716-1726
The nuclear‐encoded species cytoplasm specific (scs) genes control nuclear–cytoplasmic compatibility in wheat (genus Triticum). Alloplasmic cells, which have nucleus and cytoplasm derived from different species, produce vigorous and vital organisms only when the correct version of scs is present in their nucleus. In this study, bulks of in vivo radiation hybrids segregating for the scs phenotype have been genotyped by sequencing with over 1.9 million markers. The high marker saturation obtained for a critical region of chromosome 1D allowed identification of 3318 reads that mapped in close proximity of the scs. A novel in silico approach was deployed to extend these short reads to sequences of up to 70 Kb in length and identify candidate open reading frames (ORFs). Markers were developed to anchor the short contigs containing ORFs to a radiation hybrid map of 650 individuals with resolution of 288 Kb. The region containing the scs locus was narrowed to a single Bacterial Artificial Chromosome (BAC) contig of Aegilops tauschii. Its sequencing and assembly by nano‐mapping allowed rapid identification of a rhomboid gene as the only ORF existing within the refined scs locus. Resequencing of this gene from multiple germplasm sources identified a single nucleotide mutation, which gives rise to a functional amino acid change. Gene expression characterization revealed that an active copy of this rhomboid exists on all homoeologous chromosomes of wheat, and depending on the specific cytoplasm each copy is preferentially expressed. Therefore, a new methodology was applied to unique genetic stocks to rapidly identify a strong candidate gene for the control of nuclear–cytoplasmic compatibility in wheat. 相似文献
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Karim Aghcheli Haji-Amin Marjani Dariush Nasrollahzadeh Farhad Islami Ramin Shakeri Masoud Sotoudeh Behnoush Abedi-Ardekani Mohammad-Reza Ghavamnasiri Ezzatollah Razaei Elias Khalilipour Samira Mohtashami Yasha Makhdoomi Rabea Rajabzadeh Shahin Merat Rasoul Sotoudehmanesh Shahryar Semnani Reza Malekzadeh 《PloS one》2011,6(7)
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Dormancy genes from weedy rice respond divergently to seed development environments 总被引:1,自引:0,他引:1 下载免费PDF全文
Genes interacting with seed developmental environments control primary dormancy. To understand how a multigenic system evolved to adapt to the changing environments in weedy rice, we evaluated genetic components of three dormancy QTL in a synchronized nondormant genetic background. Two genetically identical populations segregating for qSD1, qSD7-1, and qSD12 were grown under greenhouse and natural conditions differing in temperature, relative humidity, and light intensity during seed development. Low temperatures tended to enhance dormancy in both conditions. However, genotypes responded to the environments divergently so that two populations displayed similar distributions for germination. Additive and/or dominance effects of the three loci explained approximately 90% of genetic variances and their epistases accounted for the remainder in each environment. The qSD1 and qSD7-1 main effects were increased, while the qSD12 additive effect was decreased by relatively low temperatures. Both gene main and epistatic effects were involved in G x E interactions, which in magnitude were greater than environmental main effect. The divergent responses of dormancy genes observed in this simple multigenic system presumably have selective advantages in natural populations adapted to changing environments and hence represent a genetic mechanism stabilizing the dormancy level of weedy rice ripened in different seasons or temperature regimes. 相似文献
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Vijay K. Tiwari Oscar Riera-Lizarazu Hilary L. Gunn KaSandra Lopez M. Javed Iqbal Shahryar F. Kianian Jeffrey M. Leonard 《PloS one》2012,7(11)
Physical mapping and genome sequencing are underway for the ≈17 Gb wheat genome. Physical mapping methods independent of meiotic recombination, such as radiation hybrid (RH) mapping, will aid precise anchoring of BAC contigs in the large regions of suppressed recombination in Triticeae genomes. Reports of endosperm development following pollination with irradiated pollen at dosages that cause embryo abortion prompted us to investigate endosperm as a potential source of RH mapping germplasm. Here, we report a novel approach to construct RH based physical maps of all seven D-genome chromosomes of the hexaploid wheat ‘Chinese Spring’, simultaneously. An 81-member subset of endosperm samples derived from 20-Gy irradiated pollen was genotyped for deletions, and 737 markers were mapped on seven D-genome chromosomes. Analysis of well-defined regions of six chromosomes suggested a map resolution of ∼830 kb could be achieved; this estimate was validated with assays of markers from a sequenced contig. We estimate that the panel contains ∼6,000 deletion bins for D-genome chromosomes and will require ∼18,000 markers for high resolution mapping. Map-based deletion estimates revealed a majority of 1–20 Mb interstitial deletions suggesting mutagenic repair of double-strand breaks in pollen provides a useful resource for RH mapping and map based cloning studies. 相似文献
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Factor VII has been utilized to treat post-operative bleeding after cardiac surgery refractory to other intervention. We report the case of a patient who developed intractable bleeding after a severe protamine reaction following emergency repair of type A aortic dissection and was successfully treated with factor VII. 相似文献
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Shahryar Saeidi Mehwarz 《Nordic Journal of Botany》2003,23(5):559-561
Veronica longipedicellata is described and illustrated as a new species from an alpine area in north of Iran. The new species is compared with its allies and a close relationship is suggested with V. siaretensis. 相似文献
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Yi Wang Thomas Drader Vijay K. Tiwari Lingli Dong Ajay Kumar Naxin Huo Farhad Ghavami M. Javed Iqbal Gerard R. Lazo Jeff Leonard Bikram S. Gill Shahryar F. Kianian Ming-Cheng Luo Yong Q. Gu 《BMC genomics》2015,16(1)