Genotyping-by-sequencing empowered genetic diversity analysis of Jordanian oat wild relative <Emphasis Type="Italic">Avena sterilis</Emphasis>     

Nawal Al-Hajaj  Gregory W. Peterson  Carolee Horbach  Khaled Al-Shamaa  Nicholas A. Tinker  Yong-Bi Fu 《Genetic Resources and Crop Evolution》2018,65(8):2069-2082

Recent advances in next generation sequencing technologies make genotyping-by-sequencing (GBS) more feasible for molecular characterization of plant germplasm with complex and unsequenced genomes. Here we applied the GBS technology to assess the genetic diversity of 275 hexaploid oat wild relative (Avena sterilis) plants collected from 24 natural populations in Jordan. Total genomic DNAs were extracted and digested with restriction enzymes PstI and MspI. Three Illumina MiSeq sequencing runs generated 556 paired-end FASTQ files with 127,128,438 raw sequences. Bioinformatics analysis identified an informative matrix of 275 samples × 12,999 SNP markers. Analysis revealed 52.4% of SNP variation residing among 24 populations and eight major genetic clusters of the samples. Most samples were grouped together within their original populations. A significant association of pairwise population genetic distances was found with latitudinal or longitudinal differences. Two natural populations were highly differentiated from the others, and 30 highly distinct A. sterilis samples were identified from seven populations. These findings are useful for understanding genetic variability and conservation of natural A. sterilis populations, and they demonstrate the advances of the GBS application for germplasm characterization of crop wild relatives with complex genomes.  相似文献   

Surgical treatment and histopathology of different forms of olecranon and presternal bursitis in cattle and buffalo     

Ahmed Fathy  Khaled Radad 《Journal of veterinary science (Suw?n-si, Korea)》2006,7(3):287-291

Thirty seven cases of bursitis presented to our Veterinary Teaching Hospital from 2001 to 2005. There were 10 adult female buffalos with olecranon bursitis (one had bilateral bursitis) and 26 calves (7 cattle and 19 buffalos, 16 males and 10 females) with presternal bursitis. There were 10 out of 11 cases of olecranon bursitis and 21 out of 26 cases of presternal bursitis with different forms (cystic, proliferative and fibrous) that were removed surgically. The remaining 6 cases, cystic bursitis (olecranon = 1, presternal = 5), were treated by aspiration of their contents and injection of 4% iodine tincture intrabursally. Only 2 cases recovered, 3 cases progressed to fibrosis and required further surgical treatment 2 to 3 weeks later, and 1 case continued to have a cystic lesion. Histopathological examination of tissue specimens from different forms of bursitis revealed that the acquired bursae were generally lined with synovial-like membrane formed from 2-3 cellular layers that covered the connective tissue capsule. The connective tissue capsule differed from one type to another and consisted of fibrous tissues containing numerous small blood vessels, blood capillaries, lymphatics and nerves. There was also evidence for inflammation within the capsule represented by congestion of blood vessels and the presence of perivascular inflammatory cells, mostly mononuclear. In conclusion, surgical treatment was successful and effective for treatment of olecranon and presternal bursitis particularly for the chronic proliferative and fibrous form in cattle and buffalo. The histological structure of the acquired bursae was relatively similar consisting of a synovial-like membrane and a connective tissue capsule with varying degrees of the inflammatory process.  相似文献   

Molecular performance of Prl and Gh/Igf1 axis in the Mediterranean meager, <Emphasis Type="Italic">Argyrosomus regius</Emphasis>, acclimated to different rearing salinities     

Khaled Mohammed-Geba  Antonio Astola González  Rubén Ayala Suárez  Asmaa Galal-Khallaf  Juan Antonio Martos-Sitcha  Hany Mohammed Ibrahim  Gonzalo Martínez-Rodríguez  Juan Miguel Mancera 《Fish physiology and biochemistry》2017,43(1):203-216

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A molecular and embryonic study of apomixis in cassava (Manihot esculenta Crantz)     

Nagib M.A. Nassar  Marco Andre Vieira  Clibas Vieira  Dario Grattapaglia 《Euphytica》1998,102(1):9-13

In cassava, apomixis fixes heterosis and avoids transmission of systemic pathogens which complicate vegetative propagation of the crop. A combination of evidence from maternal inheritance of RAPD markers and the structure of the embryonic sac in large progeny sets of two distinct genotypes have further confirmed the occurrence of apomixis in cassava. We could advance further on earlier reports of the detection of apomixis in four ways: (1) we could arrive at an estimate of the rate of facultative apomixis in the range of 2%; (2) we detected the occurrence of apomixis in a second genotype, derived from a different interspecific cross; (3) apomictic behavior was demonstrated in an F₁ individual and (4) parallel embryonic evidence was generated that corroborate the potential occurrence of apomixis by apospory. The fact that apomixis was detected in an F₁ interspecific hybrid hints to the possibility of directly transferring genes for apomixis from a wild relative to cultivated cassava. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Anticancer Effects of New Ceramides Isolated from the Red Sea Red Algae Hypnea musciformis in a Model of Ehrlich Ascites Carcinoma: LC-HRMS Analysis Profile and Molecular Modeling     

Sameh S. Elhady  Eman S. Habib  Reda F. A. Abdelhameed  Marwa S. Goda  Reem M. Hazem  Eman T. Mehanna  Mohamed A. Helal  Khaled M. Hosny  Reem M. Diri  Hashim A. Hassanean  Amany K. Ibrahim  Enas E. Eltamany  Usama Ramadan Abdelmohsen  Safwat A. Ahmed 《Marine drugs》2022,20(1)

Different classes of phytochemicals were previously isolated from the Red Sea algae Hypnea musciformis as sterols, ketosteroids, fatty acids, and terpenoids. Herein, we report the isolation of three fatty acids—docosanoic acid 4, hexadecenoic acid 5, and alpha hydroxy octadecanoic acid 6—as well as three ceramides—A (1), B (2), and C (3)—with 9-methyl-sphinga-4,8-dienes and phytosphingosine bases. Additionally, different phytochemicals were determined using the liquid chromatography coupled with electrospray ionization high-resolution mass spectrometry (LC-ESI-HRMS) technique. Ceramides A (1) and B (2) exhibited promising in vitro cytotoxic activity against the human breast adenocarcinoma (MCF-7) cell line when compared with doxorubicin as a positive control. Further in vivo study and biochemical estimation in a mouse model of Ehrlich ascites carcinoma (EAC) revealed that both ceramides A (1) and B (2) at doses of 1 and 2 mg/kg, respectively, significantly decreased the tumor size in mice inoculated with EAC cells. The higher dose (2 mg/kg) of ceramide B (2) particularly expressed the most pronounced decrease in serum levels of vascular endothelial growth factor -B (VEGF-B) and tumor necrosis factor-α (TNF-α) markers, as well as the expression levels of the growth factor midkine in tumor tissue relative to the EAC control group. The highest expression of apoptotic factors, p53, Bax, and caspase 3 was observed in the same group that received 2 mg/kg of ceramide B (2). Molecular docking simulations suggested that ceramides A (1) and B (2) could bind in the deep grove between the H2 helix and the Ser240-P250 loop of p53, preventing its interaction with MDM2 and leading to its accumulation. In conclusion, this study reports the cytotoxic, apoptotic, and antiangiogenic effects of ceramides isolated from the Red Sea algae Hypnea musciformis in an experimental model of EAC.  相似文献   

Sequence analysis of the internal transcribed spacers (ITSs) region of the nuclear ribosomal DNA (nrDNA) in fig cultivars (Ficus carica L.)     

Ghada Baraket  Olfa Saddoud  Khaled Chatti  Messaoud Mars  Mohamed Marrakchi  Mokhtar Trifi  Amel Salhi-Hannachi 《Scientia Horticulturae》2009

Sequences of the internal transcribed spacers (ITSs) of nuclear ribosomal DNA (nrDNA) were analysed in a set of Tunisian fig (Ficus carica L.) cultivars. The size of the spacers sequences ranged from 200 to 279 bases for ITS1 and from 253 to 314 bases for ITS2. Variation of GC contents has been also observed and scored as 59–68% and 55–68% for ITS1 and ITS2, respectively. This data exhibited the presence of polymorphism among cultivars. The intra-specific variability level of the ITS sequences proved a variation both in the length and in the sequences studied. In fact, ITS1 and ITS2 sequences were considered as a useful tool to establish genetic relationships among cultivars. Our results indicate that the diversity detected among closely related genotypes supported strongly the efficiency of ITS sequences for establishing relationships between cultivars. ITS2 seems to be relatively more informative than ITS1 regarding length or GC contents. Considerable genetic diversity was observed among fig at intra and inter-cultivars levels. Two polyclonal varieties were identified. In addition, data proved that a typically continuous genetic diversity characterizes the local fig germplasm. The topology of the derived dendrogram strongly supported this assumption. In fact, genotypes are clustered independently from their geographical origin or the sex of trees suggesting a narrow genetic basis among the ecotypes studied in spite of their phenotypic distinctiveness. Implications of these results for management of fig germplasm collections are discussed.  相似文献   

A method to assess the impact of soil available water capacity uncertainty on crop models with a tipping‐bucket approach     

Julie Constantin  Victor Picheny  Lina H. Nassar  Jacques‐Eric Bergez 《European Journal of Soil Science》2020,71(3):369-381

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Effect of harvesting system and fruit cold storage on virgin olive oil chemical composition and quality of superintensive cultivated 'Arbequina' olives     

Yousfi K  Weiland CM  García JM 《Journal of agricultural and food chemistry》2012,60(18):4743-4750

Storage at 3 and 18 °C of 'Arbequina' olives (Olea europaea L.) cultivated in hedgerows and harvested manually or mechanically (wine grape harvester) was tested. Fruit characteristics and oil quality were monitored. Mechanical harvesting caused internal fruit damage that induced its rapid softening and decay, but also facilitated obtaining higher amounts of oil, which suffered a rapid deterioration during fruit storage. This oil presented lower tocopherol and phenol contents and lower oxidative stability than the oil extracted from manually harvested olives, but showed similar fatty acid composition. Cold storage (3 °C) delayed all of these deterioration processes. It allowed maintaining the best commercial level of quality ("extra") in the oil from mechanically harvested olives for 10 days. This cold storage could be considered as an alternative to the increase in machinery for processing the growing olive production, due to both hedgerow cultivation and mechanized harvesting.  相似文献   

Studying irradiation homogeneity in light aging for historical textile conservation     

Khaled Elnagar  Sameh M. Reda  Harby E. Ahmed  Shady Kamal 《Fibers and Polymers》2013,14(9):1581-1585

Instrumental light aging is one of the most important tools for restoration and conservation of historical textiles. It used in testing stability of conservation materials, in addition to its lightening effect during the presentation in the museums. Light fading is an important tool for preparing the aged textile and other polymeric samples especially for archaeological conservation applications. Many fadometers do not give homogeneous exposure for all sample’s areas. This work studies the color changes of silk fabric dyed with turmeric (Curcuma longa L.) mordanted with alum or ferric sulfate. Color change was studied for the exposure periods ranged from five to hundred hours. Three positions of different irradiance levels were measured on the same sample namely (bottom, middle and upper). Individual color change for each position was recorded and studied. The results showed that there is non-homogeneous irradiance distribution due to different positions in fadometer or mordant used.  相似文献   

Chemical composition of the volatile extract and antioxidant activities of the volatile and nonvolatile extracts of Egyptian corn silk (Zea mays L.)     

El-Ghorab A  El-Massry KF  Shibamoto T 《Journal of agricultural and food chemistry》2007,55(22):9124-9127

A total of 36 compounds, which comprised 99.4% of the extract, were identified by gas chromatography and mass spectrometry (GC-MS) in the volatile dichloromethane extract obtained from Egyptian corn silk. The main constituents of the volatile extract were cis-alpha-terpineol (24.22%), 6,11-oxidoacor-4-ene (18.06%), citronellol (16.18%), trans-pinocamphone (5.86%), eugenol (4.37%), neo-iso-3-thujanol (2.59%), and cis-sabinene hydrate (2.28%). Dried Egyptian corn silk was also directly extracted with petroleum ether, ethanol, and water. All extracts from solvent extraction and the volatile extract described above exhibited clear antioxidant activities at levels of 50-400 microg/mL in the 2,2-diphenyl-1-picrylhydrazyl (DPPH)/linoleic acid assay. The ethanol extract inhibited DPPH activity by 84% at a level of 400 microg/mL. All samples tested via the beta-carotene bleaching assay also exhibited satisfactory antioxidant activity with clear dose responses. This study indicates that corn silk could be used to produce novel natural antioxidants as well as a flavoring agent in various food products.  相似文献