Recent molecular and breeding strategies in lettuce (Lactuca spp.)     

Hassan  Mohamed N.  Mekkawy  Sara A.  Mahdy  Mayada  Salem  Khaled F. M.  Tawfik  Eman 《Genetic Resources and Crop Evolution》2021,68(8):3055-3079

Genetic Resources and Crop Evolution - Lettuce (Lactuca spp.) is an annual and self-pollinating crop that belongs to the Asteraceae (Compositae) family. It is one of the most globally essential...  相似文献   

Growth of Siganus rivulatus reared in sea cages in the Red Sea     

Tom Lichatowich  Salem Al-Thobaity  Max Arada  Feisal Bukhari 《Aquaculture (Amsterdam, Netherlands)》1984,40(3):273-275

Siganus rivulatus fry stocked in extensively managed sea cage systems grew from 3 to 105 g in 150 days.  相似文献   

Biological treatments as a mean to improve feed utilization in agriculture animals-An overview     

Nahla A Abdel-Aziz  Abdelfattah Z M Salem  Mounir M El-Adawy  Luis M Camacho  Ahmed E Kholif  Mona M Y Elghandour  Borhami E Borhami 《中国农业科学(英文版)》2015,(3)

As a result of agriculture practices, mil ion tons of agriculture are produced as a secondary or by-products;however, with low nutritive values. Many methods are applied to improve the nutritive value ...  相似文献   

Effects of exogenous enzymes,Lactobacillus acidophilus or their combination on feed performance response and carcass characteristics of rabbits fed sugarcane bagasse     

Nahla A Abdel-Aziz  Mounir El-Adawy  Maria A Mariezcurrena-Berasain  Abdelfattah Z M Salem  Jaime Olivares-Prez  Ahmed E Kholif  Borhami E Borhami 《中国农业科学(英文版)》2015,(3)

The aim of this study was to evaluate the effect of Lactobacil us acidophilus (LAC), exogenous enzymes of ZAD? (exogenous enzyme preparation) or their combination on feed conversion, and dressing of ra...  相似文献   

Role of live microbial feed supplements with reference to anaerobic fungi in ruminant productivity:A review     

Anil K Puniya  Abdelfattah Z M Salem  Sanjay Kumar  Sumit S Dagar  Gareth W Grififth  Monica Puniya  Sreenivas R Ravella  Nikhil Kumar  Tejpal Dhewa  Ravinder Kumar 《中国农业科学(英文版)》2015,(3)

To keep the concept of a safe food supply to the consumers, animal feed industries world over are showing an increasing interest in the direct-fed microbials (DFM) for improved animal performance in te...  相似文献   

Genetic diversity in ecotypes of Tunisian date-palm (Phoenix dactylifera L.) assessed by AFLP markers     

S. Rhouma  S. Zehdi-Azouzi  A. Ould Mohamed Salem  A. Rhouma  M. Marrakchi 《The Journal of Horticultural Science and Biotechnology》2013,88(6):929-933

Summary

Amplified fragment length polymorphisms (AFLP) were used successfully to survey genetic diversity in 40 ecotypes of date-palm (Phoenix dactylifera L.) collected from oases in Tunisia. Six primer pairs were screened to assess their ability to detect polymorphism in this tree crop. As a result, a total of 428 AFLPs have been generated and used to estimate genetic distances which ranged from 0.07 – 0.63. A large, and typically continuous, range of genetic diversity characterises Tunisian date-palm germplasm. In addition, the UPGMA dendrogram derived from these data exhibited two clusterings of ecotypes independent of their geographic origin or the sex of the trees. These data corroborate the hypothesis of the origin of date-palm domestication being in Mesopotamia. Moreover, taking into account the high percentage of polymorphic bands, together with their resolving power (Rp), all the primer pairs tested contributed to the discrimination of date-palm genotypes, suggesting that the AFLP method is efficient in assessing genetic diversity in this crop. The data are discussed in relation to the use of AFLP molecular markers in the management and improvement of date-palm.  相似文献   

Fabrication of electrospun antimicrobial nanofibers containing metronidazole using nanospider technology     

Mohamed H. El-Newehy  Salem S. Al-Deyab  El-Refaie Kenawy  Ahmed Abdel-Megeed 《Fibers and Polymers》2012,13(6):709-717

Nanospider technology as a modified electrospinning technique was used for the fabrication of electrospun nanofibers based on poly(vinyl alcohol) (PVA)/poly(ethylene oxide) (PEO) blend as drug delivery system (DDS) for metronidazole (MTZ) as an antimicrobial drug. Electrospun PVA/PEO/MTZ composite nanofibers were stabilized against disintegration in water by heating in oven at 110°C, or by soaking in isopropyl alcohol for 6 hrs. Incorporation of MTZ into electrospun nanofibers was confirmed by SEM, FT-IR spectra and TGA. The drug release results showed that the burst release was suppressed with stabilized electrospun nanofibers compared with non-stabilized ones. Electrospun PVA/PEO/MTZ composite nanofibers exhibited remarkable antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, Aspergillus niger, Penicillium notatum and Aspergillus flavus which varies with the species of the tested organisms.  相似文献   

Oleaster (var. sylvestris) and subsp. cuspidata are suitable genetic resources for improvement of the olive (Olea europaea subsp. europaea var. europaea)     

Hédia Hannachi  Hilary Sommerlatte  Catherine Breton  Monji Msallem  Mohamed El Gazzah  Salem Ben El Hadj  André Bervillé 《Genetic Resources and Crop Evolution》2009,56(3):393-403

The olive belongs to Olea, a complex genus and to a species with six subspecies. Subsp. europaea includes both the cultivated olive and the oleaster, the wild ancestor of the olive. Little is known on the phenotype of fruits from subsp. cuspidata. We aimed to compare europaea and cuspidata trees for oil content and composition and to verify whether natural hybrids may exist between the two subspecies. Specimens were from Kenya and putative natural hybrids between cuspidata and europaea were from Stellenbosch (South Africa). Cultivar and oleaster trees were sampled in France (continental and Corsica), Italy (Continental and Sardinia) and Tunisia. We have examined the fruit (drupe) structure between subsp. cuspidata and europaea and extracted oil from the pulp, seed and total drupe. Comparison for oil content was made between the cultivated olive and the oleaster and some cuspidata trees from Kenya. A few of cuspidata individuals from Botanical gardens do not enable phenotyping for oil content and composition. Oil composition analyses were performed for the main fatty acids to compare the three taxa. We used microsatellite markers at 11 loci to compute genetic distances between cuspidata, oleaster and cultivar trees and to reveal eventual hybrids. The SSR polymorphisms were huge between the two subspecies and they revealed that putative hybrids were true hybrids sampled around olive orchards. The whole comparison of oil content shows that olive cultivars display higher oil content than the subsp. cuspidata and that the oleaster trees are intermediate, whereas for oil composition of the drupe, cuspidata from Kenya shows less oleic acid than europaea. However, the cuspidata trees show seed oil composition similarities with the other two taxa. The discussion deals with possible reasons to explain the differences and of the possible uses of these taxa for breeding both the olive and brown olive. H. Hannachi and H. Sommerlatte have equal contribution in the article.  相似文献   

Biochar for crop production: potential benefits and risks     

Mubshar Hussain  Muhammad Farooq  Ahmad Nawaz  Abdullah M. Al-Sadi  Zakaria M. Solaiman  Salem S. Alghamdi  Ume Ammara  Yong Sik Ok  Kadambot H. M. Siddique 《Journal of Soils and Sediments》2017,17(3):685-716

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Changes In Antioxidant Enzyme Activity In Turfgrass Cultivars Under Various Saline Water Irrigation Levels To Suit Landscapes Under Arid Regions     

Shyam S. Kurup  Mohammed Abdul Mohsen Ali Salem  Abdul J. Cheruth  Subramaniam Sreeramanan  Fayas Thayale Purayil  Abdel Wahed Al Amouri 《Communications in Soil Science and Plant Analysis》2017,48(17):1989-2001

Turfgrass cover is an inevitable component in the urban landscapes of the United Arab Emirates. Tolerance to abiotic stress like salt, drought, and high temperature is a potential factor to be considered in the selection of turfgrass for the landscapes in the arid regions. Three Seashore paspalum genotypes, four Bermudagrass cultivars along with tall fescue as a control were screened for enzymatic changes under four different saline irrigation levels of 5,000, 10,000, 15,000, and 20,000 mg L^?1 of salinity. Irrigation with potable water served as the control. Turfgrasses were maintained in a field experiment under factorial randomized block design for a period of two years under sustained saline conditions by working out the leaching fraction to maintain the precise level of salinity in each treatment throughout the experimental period. The activities of antioxidant enzymes such as superoxide dismutase (SOD), ascorbate peroxidase (APX), peroxidase (POD), polyphenol oxidase (PPO), and catalase (CAT) were assayed in each of the saline water treated turfgrass types. The SOD activity was found to be high in Yukon (bermudagrass) and Sea Dwarf paspalum. In the paspalum group, Salam and Sea Dwarf showed the highest SOD activity under saline condition. In Bermuda types, Yukon and SR 9554 showed the highest SOD activity compared to other bermuda types. Compared to other cultivars, Sea Isle 2000 (Paspalum type), SR 9554, and Yukon (Bermuda types) exhibited more APX activity without any significant differences among themselves. There was an elevated activity of POD initially, followed by gradual reduction upon increasing the salinity level. Salam cultivar maintained stable POD activity even at the elevated salinity levels. The paspalum types showed relatively high level of PPO activity compared to other types under salinity. Yukon cultivar showed a significantly higher activity of PPO when the salinity level was raised from 15,000 to 20,000 mg L^?1. A significant increase with respect to CAT activity was exhibited in Sea Dwarf under elevated level of salinity. Saline water irrigation brought about a significant effect on the antioxidant enzyme systems to impart oxidative stress tolerance in turfgrass species.  相似文献