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A Study of Combining Ability in Okra (Abelmoschus esculentus L. Moench) for Growth, Yield, and Quality characteristics

Research Abstract

A half-diallel cross among seven okra cultivars and twenty-one hybrids was conducted to examine and analyze the general (G.C.A) and specific (S.C.A) combining ability effects and genetics related to multiple yield and yield-related characteristics. The analysis study of variance showed the existence of both additives G.C.A and non-additive effects for all characters with the exception of pod length, which exhibited an additive effect G.C.A, thereby suggesting the predominant role of additive genetic variance in the expression of these traits. Only one hybrid ‘Emerald’ x‘Pusa Sawani’ showed significant positive S.C.A effects on the number of green pods/plants, weight of green pods/plant, and total green pod yield. Based on G.C.A effects, the parent ‘Pusa Sawani’ was a good general combiner for days to 50% flowering, plant height, green pod length, number of green pods/plant, weight of green pods/plant and total green pod yield characters and can be used in breeding programs for improvement of the fruit yield and other yield components characters.

Research Authors
Zainab S. Sayed1*; Hassan S. Abbas1; Karam A. Amein2 and Reham M. Abdalla1
Research Date
Research Department
Research File
Research Journal
Assiut Journal of Agricultural Sciences
Research Pages
310-321
Research Publisher
Faculty of Agriculture, Assiut University
Research Vol
56
Research Website
http://ajas.journals.ekb.eg/
Research Year
2025

Innovative low-fat cheese with selenium: Physiological benefits amidst heavy metal exposure

Research Abstract

Selenium (Se) is now recognized as one of the essential trace elements required in the diets of both humans and animals due to its significant physiological effects. This study aims to evaluate the in vivo biological effects of Se-enriched low-fat cheese when administered alongside heavy metals. Initially, rats were exposed to sublethal doses of AlCl3, CdCl2, and Pb acetate (6.11 %, 10.5 %, and 0.5 % of their LD50 values, respectively). Subsequently, the rats were fed either a control diet or Se-enriched low-fat cheese. Results indicated that the weight of groups fed heavy metals in combination with Se-enriched low-fat cheese was significantly higher (P ≤ 0.05) compared to those fed only heavy metals. Rats fed Se-enriched Kareish cheese had significantly lower creatinine and urea levels compared to the control rats, whose values were within the normal range. Additionally, rats consuming Se-enriched low-fat cheese exhibited lower triglyceride levels and reduced organ weights when exposed to heavy metals, suggesting a decrease in their toxicity. In conclusion, Se intake positively influenced the serum lipid profile and lowered the atherogenic index. The findings suggest a potential protective role of Se-enriched cheese in mitigating damage to the liver, kidneys, heart, and other tissues from the negative effects of heavy elements.

Research Date
Research Department
Research Journal
Journal of Agriculture and Food Research
Research Pages
102120
Research Publisher
Elsevier
Research Rank
Q1
Research Vol
22
Research Website
https://doi.org/10.1016/j.jafr.2025.102120
Research Year
2025

New Insights into Red and White Quinoa Protein Isolates Nutritional Functional Thermal Properties

Research Abstract

Quinoa (Chenopodium quinoa Willd.) seeds, renowned for their nutritional richness and balanced amino acid profile, offer promising potential as food ingredients. This study focused on extracting and characterizing the protein isolates from red and white quinoa varieties to evaluate their physicochemical and functional properties. Protein isolation involved alkaline solubilization and isoelectric precipitation, followed by characterization through amino acid analysis, phenolic profiling, scanning electron microscopy (SEM), zeta potential measurement, particle size distribution analysis, Differential Scanning Calorimetry (DSC), and rheological studies. The results showed that both the red and white quinoa protein isolates exhibited high protein content and essential amino acids, with notable differences in their amino acid compositions. The phenolic and flavonoid content varied between the red and white quinoa seeds, highlighting their potential antioxidant properties. SEM revealed distinct microstructural differences between the red and white quinoa protein isolates. Zeta potential measurements indicated the negative surface charges, influencing the stability in the solution. A particle size distribution analysis showed the monomodal distributions with minor variations in the mean particle size. The DSC profiles demonstrated multiple denaturation peaks, reflecting the complex protein compositions. Rheological studies indicated diverse gelation behaviors and mechanical properties. Overall, this comprehensive characterization underscores the potential of quinoa protein isolates as functional food ingredients with diverse applications in the food industry

Research Authors
Khalid A. Alsaleem 1,* , Rofida F. Moftah 2 and Mennatallah M. A. El-Geddawy 2
Research Date
Research Year
2024

A Comparative Study on Some Oils as Natural Antioxidants

Research Abstract
Over the past few years, several scientific researchers investigated that the rosemary, sweet almond and thyme oils are now recognized as essential components of functional foods.This study evaluates the quantities of flavonoids, total phenolic content (TPC), antioxidant properties, and fatty acid composition of almond, thyme, and rosemary oils. The results of the fatty acid analysis showed that the two oils had different profiles;sweet almond oil had considerable amounts of the important fatty acids;oleic and linoleic acids, while almond oil was rich in monounsaturated fatty acids (MUFA) and low in saturated fatty acids.Moreover, rosemary oil had the highest phenolic content among the other investigated oils; thyme oil had the highest flavonoids and antioxidant activity among the other oils. These results highlight the beneficial nutritional and functional qualities of almond, thyme, and rosemary oils, indicating their potential use as food components or nutritional supplements with positive health effects.
Research Authors
Amira Y. A. Amen; Mohamed R.A. Rashwan; Rofida F. Moftah
Research Date
Research File
12.pdf (844.84 KB)
Research Year
2024

Novel genomic regions and gene models controlling copper and cadmium stress tolerance in wheat seedlings

Research Authors
Amira MI Mourad, Sara Baghdady, Fatma Al-Zahraa M Abdel-Aleem, Randa M Jazeri, Andreas Börner
Research Date
Research Department
Research Journal
Agronomy
Research Member
Research Pages
2876
Research Publisher
MDPI
Research Vol
14
Research Website
https://www.mdpi.com/2073-4395/14/12/2876
Research Year
2024

Genome-wide analysis for root and leaf architecture traits associated with drought tolerance at the seedling stage in a highly ecologically diverse wheat population

Research Abstract

Drought stress occurred at early growth stages in wheat affecting the following growth stages. Therefore, selecting promising drought-tolerant genotypes with highly adapted traits at the seedling stage is an important task for wheat breeders and geneticists. Few research efforts were conducted on the genetic control for drought-adaptive traits at the seedling stage in wheat. In this study, a set of 146 highly diverse spring wheat core collections representing 28 different countries was evaluated under drought stress at the seedling stage. All genotypes were exposed to drought stress for 13 days by water withholding. Leaf traits including seedling length, leaf wilting, days to wilting, leaf area, and leaf rolling were scored. Moreover, root traits such as root length, maximum width, emergence angle, tip angle, and number of roots were scored. Considerable significant genetic variation was found among all genotypes tested in these experiments. The heritability estimates ranged from 0.74 (leaf witling) to 0.99 (root tip angle). A set of nine genotypes were selected and considered drought-tolerant genotypes. Among all leaf traits, shoot length had significant correlations with all root traits under drought stress. The 146 genotypes were genotyped using the Infinium Wheat 15 K single nucleotide polymorphism (SNP) array and diversity arrays technology (DArT) marker platform. The result of genotyping revealed 12,999 SNPs and 2150 DArT markers which were used to run a genome-wide association study (GWAS). The results of GWAS revealed 169 markers associated with leaf and root traits under drought stress. Out of the 169 markers, 82 were considered major quantitative trait loci (QTL). The GWAS revealed 95 candidate genes were identified with 53 genes showing evidence for drought tolerance in wheat, while the remaining candidate genes were considered novel. No shared markers were found between leaf and root traits. The results of the study provided mapping novel markers associated with new root traits at the seedling stage. Also, the selected genotypes from different countries could be employed in future wheat breeding programs not only for improving adaptive drought-tolerant traits but also for expanding genetic diversity.

Research Authors
Ahmed Sallam, Rawan A Awadalla, Maha M Elshamy, Andreas Börner, Yasmin M Heikal
Research Date
Research Department
Research Journal
Computational and Structural Biotechnology Journal
Research Member
Research Publisher
Elsevier
Research Rank
Q1
Research Website
https://www.sciencedirect.com/science/article/pii/S2001037024000205
Research Year
2024

Broad-spectrum resistance to fungal foliar diseases in wheat: recent efforts and achievements

Research Abstract

Wheat (Triticum spp.) is one of the most important cereal crops in the world. Several diseases affect wheat production and can cause 20-80% yield loss annually. Out of these diseases, stripe rust, also known as yellow rust (Puccinia striiformis f. sp. tritici), stem rust (Puccinia graminis f. sp. tritici), leaf rust (Puccinia recondita), and powdery mildew (Blumeria graminis f. sp. tritici) are the most important fungal diseases that infect the foliar part of the plant. Many efforts were made to improve wheat resistance to these diseases. Due to the continuous advancement in sequencing methods and genomic tools, genome-wide association study has become available worldwide. This analysis enabled wheat breeders to detect genomic regions controlling the resistance in specific countries. In this review, molecular markers significantly associated with the resistance of the mentioned foliar diseases in the last five years were reviewed. Common markers that control broad-spectrum resistance in different countries were identified. Furthermore, common genes controlling the resistance of more than one of these foliar diseases were identified. The importance of these genes, their functional annotation, and the potential for gene enrichment are discussed. This review will be valuable to wheat breeders in producing genotypes with broad-spectrum resistance by applying genomic selection for the target common markers and associated genes.

Research Authors
Amira M.I. Mourad, Asmaa A.M. Ahmed, Stephen P Beanziger, Andreas Börner, Ahmed Sallam
Research Date
Research Department
Research Journal
Frontiers in Plant Science
Research Publisher
Frontiers
Research Rank
Q1
Research Website
https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2024.1516317/full
Research Year
2024

The role of salicylic acid in modulating phenotyping in spring wheat varieties for mitigating drought stress

Research Abstract

Climate change-related droughts that recur frequently are one of the biggest obstacles to wheat (Triticum aestivum L.) productivity. Worldwide, attempts are being done to establish drought-resistant cultivars. However, progress is slow since drought tolerance is a complex trait controlled by numerous genes, and its expression is influenced by the environment. Phenotypic, biochemical physiological, and genotyping approaches are highlighted as critical research components for leveraging genetic variation in eight wheat genotypes. Treatments included eight spring wheat genotypes (IPK_040, IPK_046, IPK_050, IPK_071, IPK_105, WAS_007, WAS_024 and WAS_031), normal irrigation (NI), drought stress (D) (30% field capacity (FC)), normal irrigation with 0.5 mM SA (NSA), and drought treated with SA (DSA). The results revealed that there was a reduction in relative water content, an increase membrane leakage, and leaf chlorophyll content under drought stress. SA induced the defense responses against drought by increasing the osmolytes and the antioxidative enzymes activities. Compared to the NI group, the DSA treatment improved the water regulation, antioxidant capacity, and drought stress resistance. SA significantly reduced the deleterious effects of water stress on phenotyping more in WAS_ 024 and IPK_ 105 genotypes. The most responsive genotypes to salicylic acid were IPK_ 046 among the IPK genotypes, whereas WAS_031 genotype was amongst WAS genotypes based on the morpho-physiological traits. The findings of this study give a solid foundation for assessing drought resistance in T. aestivum and developing cultivation-specific water management methods.

Research Authors
Rawan A. Awadalla, Ahmed Sallam, Andreas Börner, Maha M. Elshamy & Yasmin M. Heikal
Research Date
Research Department
Research Journal
BMC Plant Biology
Research Member
Research Publisher
Springer
Research Rank
Q1
Research Website
https://link.springer.com/article/10.1186/s12870-024-05620-5
Research Year
2024

Effectiveness and genetic control of Trichoderma spp. as a biological control of wheat powdery mildew disease

Research Authors
Amira M.I. Mourad, Andreas Boerner, Samar M. Esmail
Research Date
Research Department
Research Journal
Phytopathology
Research Member
Research Pages
2221-2234
Research Publisher
The American Phytopathological Society (APS)
Research Vol
114
Research Website
https://doi.org/10.1094/PHYTO-05-24-0157-R
Research Year
2024

Screening Wheat Genotypes for Specific Genes Linked to Drought Tolerance

Research Abstract

Drought stress, which significantly affects growth and reduces grain yield, is one of the main problems for wheat crops. Producing promising drought-tolerant wheat cultivars with high yields is one of the main targets for wheat breeders. In this study, a total of seven drought-tolerant wheat genotypes were screened for the presence of 19 specific drought tolerance genes. The genotypes were tested under normal and drought conditions for two growing seasons. Four spike traits, namely, spike length (SPL), grain number per spike (GNPS), number of spikelets per spike (NSPS), and grain yield per spike (GYPS), were scored. The results revealed that drought stress decreased the SPL, GNPS, NSPS, and GYPS, with ranges ranging from 2.14 (NSPS) to 13.92% (GNPS) and from 2.40 (NSPS) to 11.09% (GYPS) in the first and second seasons, respectively. ANOVA revealed high genetic variation among the genotypes for each trait under each treatment. According to the drought tolerance indices, Omara 007 presented the highest level of drought tolerance (average of sum ranks = 3), whereas both Giza-36 genotypes presented the lowest level of drought tolerance (average of sum ranks = 4.8) among the genotypes tested. Among the 19 genes tested, 11 were polymorphic among the selected genotypes. Omara 007 and Omara 002 presented the greatest number of specific drought tolerance genes (nine) tested in this study, whereas Sohag-5, Giza-36, and PI469072 presented the lowest number of drought tolerance genes (four). The number of different genes between each pair of genotypes was calculated. Seven different genes were found between Omara 007 and Giza-36, Omara 007 and Sohag-5, and Omara 002 and PI469072. The results of this study may help to identify the best genotypes for crossing candidate genotypes, and not merely to genetically improve drought tolerance in wheat.

Research Authors
Ahmed Sallam, Mohamed H. ELdafrawy, Mona F. A. Dawood, Mostafa Hashem
Research Date
Research Department
Research Journal
Genes
Research Publisher
MDPI
Research Rank
Q2
Research Website
https://www.mdpi.com/2073-4425/15/9/1119
Research Year
2024
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