النشر العلمي

  • Variability in Striga hermonthica (Del.) Benth. Populations in Kordofan Area, Western Sudan

Field surveys were conducted during the rainy season, 2008/09, in Kordofan area, Western Sudan, to investigate variability within S. hermonthica populations with respect to morphological characters. Five locations; Um-Rawaba, El-Rahad, Kadugli, Khour-Tagat and El Obied; were selected at random in Striga hermonthica endemic area in Western Sudan. Variability among S. hermonthica populations was determined by measuring morphological characters including number of plants / m2, plant height, number of leaves, number of internodes, capsules / plant and shoot dry weight. Flower characters including number of ribs / calyx, flower width, Length of corolla tube, bracts width, colour of spike and colour at drying. Data on S. hermonthica morphology were collected and subjected to descriptive analysis and analysis of variance (ANOVA). Where the test was significant, separation of means was done by using Duncan's Multiple Range Test (P ≤ 0.05). Data on flower characters were subjected to descriptive analysis and compared with the taxonomic key published by Parker and Riches (1993). The results of the surveys revealed that, S hermonthica was found on both sorghum and millet genotypes in Kordofan area. S hermonthica populations collected from different locations in Kordofan area showed significant differences in morphological characters. However, differences in flower shape, size and colour were often not significant. Average Striga height ranged between 56.2-64.2 cm, leaves production ranged between 44.7-78.1, number of internodes ranged between 22.3-40.4 and density ranged between 33.7-71 plant / m2. Average of capsules / plant ranged between 33.6-54.3, seeds per parasite ranged between 23520-37986.7 and Striga shoot dry weight ranged between 1.57-14.23 g. The average of ribs / calyx ranged between 5.3–6.1, flower cross ranged between 1.5-2.3 cm, length of corolla tube ranged between 1.3-1.8 cm, width of bracts was 2.4 cm and spikes had pink flowers that turn dark at drying. The variability in morphological and floral characters revealed by this study could be attributed to a multitude of variables including initial size of Striga seed bank, Striga species, strains or variants, crop genotype, management and climatic and edaphic condition including, spacing, soil fertility and moisture status. Further studies should be conducted to investigate the molecular basis of variability within Striga hermonthica populations and it's interaction with selected hosts in Sudan.

published in University of Bakht Alruda Scientific Journal. 18: 1-16.

  • The Status and Application of English as a University Requirement in Sudan

published in مجلة جامعة الامام المهدى

  • The Impact of Learning by Teaching Strategy on University Students Linguistic Copetence

published in مجلة جامعة بخت الرضا

  • The Relation between Multiple Intelligence Theory and Methods of ELT

published in مجلة جامعة بخت الرضا

  • The Role of Phonics in developing English Language Performance

published in رابطة الأدب الحديث بالقاهرة

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