Yehya Alattal

• Ph.D
• Professor (Assistant) at King Saud University

An experiment was carried out to study the effects of four pollination techniques; Bumblebees (Bombus terrerstris L.), plant growth bioregulator (PGB) (Parachlorophenoxy acetic acid), hand vibration, and control (natural pollination) on tomato (Lycopersicon esculentum Mill) production in greenhouses. Bumblebees showed no problem in visiting flowers...

The reproduction of the honey bee mite, Varroa destructor in sealed worker bee brood cells represents an important factor for the population development of this parasite in honey bee colonies. In this study, the relative infestation levels of worker brood cells, mite fertility (mites that lay at least one egg) and reproductive rate (number of viabl...

Thrips of the suborder Tubulifera were collected across Saudi Arabia, with 18 species in nine genera being found. Eight species and six genera are recorded for the first time from this country and Haplothrips microcephalum Rasool sp. nov. is described as new to science. A key is provided to the genera and species of Saudi Arabia, together with a ch...

We report the whole-genome sequence of the Arabian honeybee (Apis mellifera jemenetica). Seven A. m. jemenetica samples were sequenced representing three distinct subpopulations. Generated sequence reads were mapped to the reference honeybee Apis mellifera genome (Amel_HAv3.1). Data revealed genome-wide patterns of genetic variation which can be us...

Simple Summary The honeybee subspecies Apis mellifera jemenitica is highly adapted to extreme summer temperatures. This adaptation can be explained by many anatomical, behavioral and molecular components. Basically, many genes are upregulated/silenced in response to stressors. Histone post-translational modifications (PTMs) represent an important g...

This faunistic study of the Thysanoptera suborder Terebrantia of Saudi Arabia has revealed 79 species in 39 genera and four families. Two families Melanthripidae Bagnall and Stenurothripidae Bagnall, also 25 genera and 51 species, are newly recorded for Saudi Arabia, and Mycterothrips arabicus sp. n. and Scirtothrips erectus sp. n., are described....

Simple Summary A. m. jemenetica occurs naturally on the Arabian Peninsula and in tropical Africa, and this honeybee subspecies has acquired several morphological, behavioral and molecular adaptations to extreme summer temperatures in Saudi Arabia. In this study, expression levels of different heat-shock protein (hsp) genes in forager A. m. jemeneti...

Simple Summary Upregulation of heat shock proteins (hsp) is a key mechanism to diminish heat stress in Apis mellifera. In this study, we investigated how histone methylation states present an epigenetic layer of hsp regulation in response to heat stress in two honeybee subspecies: A. m. jemenetica, a thermo-tolerant honeybee subspecies native to th...

Royal jelly (RJ) consumption is expanding because of its high nutritional and bioactive content. However, there is a lack of information to standardize the limit of properties of Saudi Royal Jelly for regulation. The aim of this study is to investigate the quality of Saudi royal jelly associated with the international standard. Twelve fresh royal j...

Morphometric and genetic characterization of many Apis mellifera subspecies are well-documented. A. m. jemenetica occurs naturally in Africa and Asia. In this study, genetic variation of mitochondrial Cytochrome Oxidase II (COII) and III (COIII) were analysed in 133 specimens of the endemic honeybee colonies within Saudi Arabia. The COII gene seque...

The Anaphothrips genus-group is recorded from Saudi Arabia for the first time. Nine species are recorded in four genera, Aptinothrips Haliday, Anaphothrips Uzel, Eremiothrips Priesner and Psilothrips Hood, and Eremiothrips aldryhimi sp. nov. and E. unicolour sp. nov. are described. Variation in male sternal pore plates of An. graminum Priesner is d...

The Arabian Honeybee Apis mellifera jemenitica is endemic to the Arabian Peninsula. It is highly adapted to temperature extremes and drought dominating the region. In this study, the mitochondrial Cytochrome Oxidase I (COI) was analyzed in 133 specimens of A. m. jemenitica from eight localities along the Red Sea cost of Saudi Arabia. Results reveal...

The subfamily Sericothripinae Karny (Thysanoptera: Thripidae) is recorded for the first time from the Saudi Arabian fauna. Four species belonging to two genera, Hydatothrips Karny and Neohydatothrips John, are recognized, and H. bahaensis Rasool, sp. n. is described from Al Baha region (southwestern of Saudi Arabia). Host-plant associations are giv...

Dearth-period pollen or pollen supplement feedings have become a common practice to maintain and stimulate the early buildup of honeybee colonies. Not only amount, type and consumption rate of feeds are important but the conversion and its nutrient availability are essential. In the current study, we investigated how honey bee colony's brood rearin...

Queen mating frequency is an important reproductive trait of the western honeybee Apis mellifera. Yet, it demands more attention when investigated under extreme or confined ecosystems. Queen mating frequency of the Yemeni Honeybee A. m. jemenetica was estimated under Saudi Arabia desert conditions, Riyadh (24°71′36″N, 46°67′53″E). Mating of queens...

Fourteen mitochondrial genomes from workers of the Arabian Honeybee Apis mellifera jemenitica were determined. Genomes range from 16,352 to 16,445 bp. Each consists of 13 protein-coding genes, 22 transfer RNAs, two ribosomal RNAs, and one control region. The mitogenome sequences revealed 753 Variable sites in total, distributed within protein-codin...

The honey bee (Apis mellifera L.) from Socotra archipelago (Yemen) has been characterized based on 32 morphometrical characters and on the sequence analysis of the tRNAleu - COII intergenic region of the mtDNA. Morphometric clustering by discriminant analysis grouped almost all honey bees from Socotra (93.8%) with Apis mellifera litorea Smith refer...

The current study aimed to investigate the important reproductive biology and morphology of A.m. jemenitica queens and drones through measuring the weight of virgin and mated queens, size and weight of spermathecae, weight of ovaries, number of ovarioles, quantity and viability of semen in queen and drones. Accordingly, the average weights of 0.139...

Propolis is a gummy material made by honeybees for protecting their hives from bacteria and fungi. The main objective of this study is to determine the chemical compositions and concentrations of organic compounds in the extractable organic matter (EOM) of propolis samples collected from four different regions in Yemen. The propolis samples were ex...

The aim of the study was to detect the infection level of honey bees with Nosema apis and/or Nosema cer-anae using microscopic and molecular analysis from indigenous honeybee race of eight Saudi Arabian geographical regions. A detailed survey was conducted and fifty apiaries were chosen at random from these locations. Infection level was determined...

Varroa mite is the most destructive pest to bee colonies worldwide. In Saudi Arabia, preliminary data indicated high infestation levels in the exotic honeybee colonies; such as Apis mellifera carnica and Apis mellifera ligustica, compared to native honeybee subspecies Apis mellifera jemenit-ica, which may imply higher tolerance to Varroasis. In thi...

Propolis is a gummy material made by honeybees for protecting their hives from bacteria and fungi. The main objective of this study is to determine the chemical compositions and concentrations of organic compounds in the extractable organic matter (EOM) of propolis samples collected from four different regions in Yemen. The propolis samples were ex...

A large-scale field survey was conducted to screen major Saudi Arabian beekeeping locations for infection by Melissococcus plutonius. M. plutonius is one of the major bacterial pathogens of honeybee broods and is the causative agent of European Foulbrood disease (EFB). Larvae from samples suspected of infection were collected from different apiarie...

A total of 72 Apis melllifera jemenitica honeybee samples were collected from eight different provinces within Saudi Arabia. Samples consisted of adult worker bees and capped brood cells. All samples were analyzed to estimate Varroa destructor mite infestation levels, and isolated V. destructor mites (n = 90) were subjected to DNA analysis. Results...

Propolis is a gummy material made by honeybees for protecting their hives from bacteria and fungi. The main objective of this study is to determine the chemical compositions and concentrations of organic compounds in the extractable organic matter (EOM) of propolis samples collected from four different regions in Yemen. The propolis samples were ex...

Abstract Survival rates were monitored among three honey bee subspecies under two ecological regions within Saudi Arabia; Riyadh characterized by desert climate and Albaha resembling semiarid climate. Frequency of colony losses were counted and categorized within three temperature ranges of maximum monthly temperatures (20-28, 29-37 and 38-46 °C) f...

A total of 72 Apis melllifera jemenitica honeybee samples were collected from eight different provinces within Saudi Arabia. Samples consisted of adult worker bees and capped brood cells. All samples were analyzed to estimate Varroa destructor mite infestation levels, and isolated V. destructor mites (n = 90) were subjected to DNA analysis.Results...

مقدمة المترجمين يُعدُُّ هذا الكتاب واحداً من أهم الترجمات في مجال البيولوجية الجزيئية للحشرات. حيث ينفرد عن غيرة من المراجع والمقررات الجامعية لمرحلة البكابوريوس والماجستير بأنه يقدم شرحاً وافياً عن المورثات وتنظيم المادة الوراثية من حيث تركيب المورث ومضاعفته ونسخه وترجمته وتنظيمه وتطوره والتحكم بالمورثات في الحشرات ومفصليات الأرجل الأخرى. كما يشرح...

The morphometry of native honeybees from Saudi Arabia was analysed and compared with 7 Apis mellifera subspecies, based on 198 colony samples from 36 locations. Twenty five standard morphological characters were evaluated, and samples were compared with seven reference honeybee subspecies (Apis mellifera carnica, A. m. ligustica, A. m. meda, A. m....

Morphometric and genetic markers are very common and powerful tools used to characterize honey bee subspecies. In Saudi Arabia, morphometric analysis using 24 characteristics separated the Saudi honey bee between two reference subspecies. Most Saudi honey bee samples clustered with Apis mellifera jemenitica reference group, but others were more sim...

Spread and use of exotic honeybee subspecies into Saudi Arabia bear significant risk on the conservation of the indigenous honeybee Apis mellifera jemenitica. The fallout of imported honeybee on population structure and diversity of Apis mellifera jemenitica populations have been investigated using microsatellite markers. Results demonstrated high...

Candida species, especially Candida albicans, are major fungal pathogens of humans that are capable of causing superficial mucosal infections and systemic infections in humans. The aim of this study was to evaluate the jujube (Zizyphus spina-christi) honey for its in vitro inhibitory activity against pre-formed biofilm and its interference with the...

Background an aims: Antibiotic multiresistant microbes represent a challenging problem. Because honey has a potent antibacterial property, the antimicrobial effects of different honey samples against multiresistant pathogens and their compositions were investigated. Methods: Five honey samples were used: Talah, Dhahian, Sumra-1, Sidr, and Sumra-...

Abstract. Twenty four morphological traits of Honeybees (Apis mellifera Linnaeus, 1758) were evaluated in 198 native colonies within Saudi Arabia to differentiate among populations. Principal component analysis based on colony means and k-means clustering proposed a separation of Saudi Honeybees into three clusters. These were confirmed by discrimi...

Background: Propolis and honey are natural bee products with wide range of biological and medicinal properties. The study investigated antimicrobial activity of ethyl alcohol extraction of propolis collected from Saudi Arabia (EEPS) and from Egypt (EEPE), and their synergistic effect when used with honey. Single and polymicrobial cultures of antibi...

Diploid wheat Triticum monococcum L. is a model plant for wheat functional genomics. Chlorophyll-deficient mutant (clm1) was identified during manual screening of the ethyl methanesulphonate (EMS)-treated M2 progenies of T. monococcum accession pau14087 in the field. The clm1 mutant, due to significantly decreased chlorophyll content compared with...

يعد هذا المرجع واحداً من أهم المنشورات التي تناولت موضوع تلقيح النباتات بواسطة النحل ولا سيما النحل الانفرادي. وقد خُصِصت الفصول الأولى لشرح العلاقة التطورية والتعاونية بين النحل والنباتات الزهرية وتوضيح ضرورة الاهتمام بالنحل البري في إدارة عمليات إنتاج المحاصيل المختلفة كما ناقشت الخلاف حول استخدام أنواعاً دخيلة من النحل في تلقيح محاصيل الزراعات ا...

ABSTRACT The orientation of combs in traditional beehives is extremely important for obtaininga marketable honey product. However, the factors that could determine comb orientation in tradi-tional hives and the possibilities of inducing honey bees, Apis mellifera (L.), to construct moredesirable combs have not been investigated. The goal of this e...

To determine Varroa mite infestation levels in Jordan, a survey covering 180 colonies of two bee types (Apis m. syriaca and Apis m. syriaca hybrids) from six locations of 4 climatic zones was conducted during August, 8 month after the last treatment. Sampled colonies had 8-10 frames covered with bees and 3-4 brood frames. Levels of infestation were...

Since the honeybee mite Varroa destructor (Anderson and Trueman) succeeded to parasitize the Western honeybee Apis mellifera L. and accept this species as a new host it became the most serious threat to Apiculture worldwide. The very few stable relations between Varroa mites and the new host are either associated with honeybees of African origin, o...