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Öğe Characterization of cereal cyst nematodes in wheat using morphometrics, SCAR markers, RFLP, and rDNA-ITS sequence analyses(Springer, 2023) Dağlı, Deniz; Duman, Nagihan; Yüksel, Ebubekir; Yıldız, Şenol; Özer, Göksel; Dababat, Abdelfattah; İmren,MustafaIn this study, morphological and molecular characterizations of twenty-four Heterodera populations (cereal cyst nematodes, CCNs) collected from wheat production fields in Turkey were carried out. Light microscopy, species-specific markers, RFLP, and ITS sequencing were used to identify the nematode populations. The obtained CCN populations were identified as Heterodera avenae, H. filipjevi, and H. latipons according to the morphometric analysis, which was confirmed by the molecular techniques. The ITS region sequencing analysis confirmed the species identification, and phylogenetic analysis of this region grouped the populations with representative Heterodera populations from different origin countries deposited in GenBank. The simulation of four restriction enzymes, Alul, PstI, BsuRI (HaeIII), and Rsal, employed the ITS sequences of isolates to discriminate the Turkish Heterodera populations. ITS-RFLP patterns produced by endonuclease enzymes provided variations among Heterodera species. There was no intraspecific variation in populations of each Heterodera species in the ITS-RFLP analyses. The species-specific primers, AvenF-COI/AvenR-COI, HfF/HfR, and H-LatF/H-LatR, yielded 109 bp, 646 bp, and 204 bp products for H. avenae, H. filipjevi, and H. latipons populations, respectively. This is the first research to provide conclusive diagnostic tests for cyst nematode populations isolated from Turkey. These assays provide a sensitive, practical, and quick method for detecting Heterodera species and, therefore, have the potential to be utilized in the early identification of populations and monitoring of infestations without morphometric studies.Öğe Characterization of potato golden cyst nematode populations (globodera rostochiensis) in Turkey(Friends Science Publ, 2020) Toktay, Halil; Evlice, Emre; İmren, Mustafa; Özer, Göksel; Ali, Muhammad Amjad; Dababat, AbdelfattahGolden potato cyst nematode, Globodera rostochiensis (Wollenweber) Behrens, is one of the most important soilborne pathogens causing economic losses in potato. The nematode is known to occurin several countries including Turkey and has a worldwide regulatory concern. In this study, identification and genetic diversity of G. rostochiensis specimens obtained from the main potato producing areas of Turkey were determined. Twenty -five of 35 soil samples collected from the provinces of Izmir, Nevsehir and Nigde were found to contain G. rostochiensis. The variation between G. rostochiensis populations was determined when examined according to ecological and pathogenic characteristics of nematode in Turkey. The cysts of G. rostochiensis were identified by measuring the morphological characters using perennial patterns, vulval cone, vulval basin and juveniles. Phylogenetic analysis of the Large Sub Unit (LSU) region of rDNA sequences was used to assess the inter or intra phylogenetic relationships between the nematode populations. The phylogenetic analyses demonstrated that the nematode specimens from Turkey cluster with Globodera spp. and signified the presence of single species of G. rostochiensis. As a result, morphological, morphometric and molecular methods were successfully combined for identification and characterization of G. rostochiensis. The frequency of G. rostochiensis in regulatory samples frompotato -producing areas is becoming increasingly important. The morphological characterization has several complications in the detection of this quarantine nematode, using of this combination is beneficial for a reliable and quick diagnostic for these nematodes which is crucial for regulatory services and growers. The results might help to investigate different ecotypes of G. rostochiensis for comprehensive understanding about physiology, ecology , and biology of the genus Globodera for its effective management in Turkey. (C) 2020 Friends Science PublishersÖğe Dayanıklılık geni Cre1’in Akdeniz tahıl kist nematodu, Heterodera latipons Franklin (Tylenchida: Heteroderidae)’e karşı etkinliğinin araştırılması(2014) İmren, Mustafa; Uludamar, Ece Börteçine Kasapoğlu; Dababat, Abdelfattah; Toktay, Halil; Elekcioğlu, İbrahim HalilTahıl kist nematodları (Heterodera avenae group) buğdayın önemli zararlılarından biri olup, Türkiye’de Heterodera avenae Wollenweber, H. latipons Franklin ve H. filipjevi (Madzhidov) Stone olmak üzere üç önemli türü farklı buğday üretim alanlarında saptanmıştır. Ülkemizin makarnalık buğdayın merkezi olan Güneydoğu Anadolu Bölgesi’nde Akdeniz tahıl kist nematodu, Heterodera latipons’un yaygın olarak bulunduğu, bölge genelinde birçok lokasyonda ekonomik zarar eşiğinin üstünde popülasyona sahip olduğu rapor edilmiştir. Buğday yetiştiriciliğinde kist nematodları ile en etkin mücadele yöntemi dayanıklı/tolerans çeşit kullanımı olarak bilinmektedir. Günümüzde buğdayın yabani türlerinden kültür formlarına aktarılmış dokuz farklı dayanıklılık geni (Cre genleri) mevcuttur. Bu çalışmada dayanıklılık geni Cre1’in H. latipons’un Gaziantep (Karkamış) popülasyonuna karşı etkinliği araştırılmıştır. Çalışmada genomunda dayanıklılık geni Cre1 bulunan SILVERSTAR buğday çeşidinin yanı sıra SOKOLL, CALINGIRI, GOLDMARKER, FRAME, STYLET, PASTOR ve CROC_1/AE.SQUARROSA(224)//OPATA çeşitlerine ait ebeveynlerin melezlenmesi ile geliştirilen 38 adeti dayanıklılık geni taşıyan, 26 adeti dayanıklılık geni taşımayan toplam 64 adet buğday genotipi H. latipons’a karşı denemeye alınmıştır. Çalışma sonucunda 64 adet genotipten 20’si nematoda dayanıklı, 32’si orta dayanıklı ve 12’sinin ise orta hassas olduğu tespit edilmiştir. Genomunda Cre1 geni taşıyan 38 melezden ise 10’nun H. latipons’a karşı dayanıklı, 20’sinin orta dayanıklı ve 8’nin ise orta hassas olduğu saptanmıştır. Bu çalışma ile dayanıklılık geni Cre1’in H. latipons’un Gaziantep (Karkamış) popülasyonuna karşı mutlak bir dayanıklılığa sahip olmamakla birlikte %78 etkinlik oranı ile başarılı olduğu ve ulusal buğday ıslah programlarında H. latipons’a karşı kullanılabileceği sonucuna varılmıştır. Ayrıca, PASTOR, SOKOLL ve CROC_1/AE.SQUARROSA(224)//OPATA buğday genotiplerinin H. latipons’a karşı iyi bir dayanıklılık kaynağına sahip olduğu saptanmıştır.Öğe Effect of cereal cyst nematode Heterodera Filipjevi on wheat yields in Turkey(2020) İmren, Mustafa; Yıldız, Şenol; Çiftçi, Vahdettin; Dababat, AbdelfattahThe cereal cyst nematode Heterodera filipjevi (Madzhidov) Stelter is an important yield-limiting soil-borne pathogen of wheat- and barley-growing areas, particularly in the semiarid regions throughout the world. In Turkey, cyst nematodes have been detected in several localities of wheat- and barley-growing areas. This study was conducted to evaluate the effects of initial population densities (Pi) of Heterodera filipjevi on yield of susceptible (Seri-82) and resistant (Silverstar) wheat cultivars and to investigate nematode reproduction on wheat under rainfed conditions in Bolu Province in Turkey. The results indicated that cultivar Seri-82 showed higher sensitivity reaction to H. filipjevi than cultivar Silverstar. Yield reduction was negatively correlated with H. filipjevi initial population (Pi) for both wheat cultivars. Yield losses reached up to 40.5% and 8.54% for Seri-82 and Silverstar, respectively, at nematode density (Pi) (eggs + J2)/g soil of 44 and 38. There was a positive relationship between nematode Pi and final population (Pf), while the nematode reproduction factor (RF) was negatively correlated with nematode Pi of H. filipjevi on both wheat cultivars. Moreover, there was no relationship between the date of release of cultivars and their responses to the nematodes. Identification of resistance sources against H. filipjevi and the introduction of those into the selected germplasms by breeding programs is important for future studies.Öğe First report of common root rot on triticale caused by bipolaris sorokiniana in Kazakhstan(Amer Phytopathological Soc, 2020) Özer, Göksel; İmren, Mustafa; Özdemir, Fatih; Morgounov, Alexei; Dababat, Abdelfattahriticale (×Triticosecale Wittmack) is a man-made crop obtained from the crossing of wheat (Triticum sp.) × rye (Secale cereale L.) and is adapted to harsh conditions. It is mainly cultivated as a feed grain for livestock in Kazakhstan. In 2019, a survey in three triticale fields in Almaty province revealed a pathogen on underground portions of the plant, which caused stunting and subcrown internode necrosis of the infected roots. To identify the causal agent(s), sections of necrotic tissues (3 to 5 mm) were superficially disinfected in 1% NaOCl solution for 2 min, rinsed with sterile distilled water, and placed on 1/5 strength potato dextrose agar (PDA) amended with 0.01% streptomycin. After 5 days of incubation at 20°C in the dark, fungal colonies of similar morphological features were observed and purified to separate PDA plates using the single-spore isolation technique.Öğe First report of the cereal cyst nematode (Helerodera filipjevi)-on wheat in Algeria(Amer Phytopathological Soc, 2018) Smaha, Djamel; Mokrini, Fouad; İmren, Mustafa; Mokabli, Assia; Dababat, AbdelfattahCereal cyst nematodes (CCNs) are an important group of sedentary plant-parasitic nematodes that restrict production of cereal crops throughout the world (Smiley et al. 2017). Heterodera filipjevi is considered one of the most destructive Heterodera species and causes significant damage in global wheat production (Dababat et al. 2015). In April 2016, two populations of cyst nematode were collected from Lamtar (35°4′4″ N; 0°47′53″ W) and Telagh (34°47′6″ N; 0°34′23″ W) wheat (Triticum durum) fields of Sidi Bel Abbes province in Algeria. The wheat fields had stunted patches, poor plant growth, chlorotic lower leaves, and few or no tillers. Cyst extraction from soils taken from the Lamtar and Telagh fields resulted in 9 and 11 cysts per 100 cm3 of soil, respectively. The cysts were extracted from soil using a Fenwick can technique (Fenwick 1940) and identified by morphology and morphometric analysis as well as by internal transcribed spacer (ITS)-rDNA sequencing. Morphologically, the cysts were lemon shaped with a posterior protuberance. The vulval cone was bifenestrate with horseshoe-shaped semifenestra and had strongly developed bullae and an underbridge.Öğe A GWAS to identify the cereal cyst nematode (Heterodera filipjevi) resistance loci in diverse wheat prebreeding lines(Springer Heidelberg, 2021) Dababat, Abdelfattah; Arif, Mian Abdur Rehman; Toktay, Halil; Atiya, Osameh; Shokat, Sajid; Orakçı, Gül Erginbaş; İmren, MustafaYield losses because of cereal cyst nematodes could be as high as 92%, causing a bottleneck for wheat production. An integrated approach (application of pesticides, crop rotation, and use of host resistance) is needed to manage this devastating pathogen where resistant cultivars are considered most effective. This necessitates the identification of nematode-resistant sources in the available germplasm. Here, we report on the genetic mapping of nematode resistance in 255 diverse prebreeding lines (PBLs) employing an association mapping strategy. Altogether, seven additive quantitative trait loci (QTL) were identified on chromosomes 1A, 2A, 2B, 2D, 3A, 6B, and 6D explaining a maximum of 9.42% phenotypic variation where at least five QTL (on chromosomes 2A, 2B, 2D, 6B, and 6D) are located on the same chromosomes that harbor the already known nematode resistance genes. Resistant PBLs carried Aegilops squarrosa (436) in their pedigree which could be the possible source of positive alleles. To add to it, better yield performance of the identified nematode-resistant lines under stress conditions indicates that the germplasm can provide both nematode resistance and high-yielding cultivars.Öğe Heterodera schachtii (Nematoda: Heteroderidae) Associated with Cabbage-Cultivation Systems in Anatolia Region of Türkiye(Mdpi, 2024) Akyol, Gulsum Badel; Yuksel, Ebubekir; Elci, Eminur; Bozbuga, Refik; Dababat, Abdelfattah; Imren, Mustafa; Toktay, HalilHeterodera schachtii (Schmidt, 1871) (Nematoda: Heteroderidae) is one of the most widespread plant-parasitic nematodes (PPNs) associated with cabbages, which cause severe yield losses in cruciferous vegetables. This study aimed to improve the current understanding of the prevalence and detection of H. schachtii in the cabbage-growing areas of Ni & gbreve;de Province, T & uuml;rkiye. Field surveys were conducted between November and December 2021, and 100 soil samples were collected immediately after cabbage harvesting. Heterodera schachtii populations were identified by morphological and morphometric methods along with Internal Transcribed Spacer of the ribosomal region (ITS-rDNA) and Cytochrome Oxidase Subunit (COI-mtDNA) sequencing. The mean body length of H. schachtii was 463 +/- 7 mu m, while stylet and hyaline length ranged between 20.7-27.8 mu m and 20.1-32.1 mu m, respectively. Nearly half of the surveyed areas were infested with H. schachtii with a 41% incidence rate. However, the Merkez District had the highest proportion of infested fields with an over 51% incidence rate. The population density was determined in 41 samples with a mean of 79.5 cysts per 250 g of soil. These results will help to determine the control and management strategies of H. schachtii.Öğe Host suitability of wheat cultivars to Pratylenchus thornei Sher & Allen, 1953 and Pratylenchus neglectus (Rensch, 1924) (Tylenchida: Pratylenchidae)(ENTOMOLOGICAL SOC TURKEY, EGE UNIV, 2021) Duman, Nagihan; Özer, Göksel; Dababat, Abdelfattah; İmren, MustafaRoot lesion nematodes (RLNs), Pratylenchus thornei Sher & Allen, 1953 and Pratylenchus neglectus (Rensch, 1924) (Tylenchida: Pratylenchidae) are important plant-parasitic nematodes that cause economic yield losses in wheat cropping systems worldwide. The use of resistant and tolerant cultivars is the most effective method to control these nematodes in wheat. There are currently no commercial wheat cultivars identified as completely resistant to the RLN species. The aim of this research was to evaluate 19 Turkish spring wheat cultivars for reaction to P. thornei and P. neglectus under in-vitro conditions over 16 weeks in 2019. In the result of the study, nine wheat cultivars (Adana99, Ata89, Burkut, Cumhuriyet75, Gonen98, Marmara86, Meta2002, Troya and Uludag) were found to have moderate resistance against P. thornei, whereas five wheat cultivars (Adana99, Alibey, Ata89, Ceyhan99 and Uludag) were moderately resistant to P. neglectus. The study also showed that Adana99, Ata89 and Uludag are resistant to both nematode species, and these cultivars, thus, are considered to be excellent sources of genes for further development RLN resistant commercial wheat cultivars.Öğe Identification and genetic diversity of the Mediterranean cereal cyst nematode, Heterodera latipons Franklin, 1969 (Tylenchida: Heteroderidae) in cereal production areas of Northern Cyprus(Entomological Soc Turkey, Ege Univ, 2020) Özarslandan, Adem; İmren, Mustafa; Özer, Göksel; Karaca, Cem; Dababat, AbdelfattahThe Mediterranean cereal cyst nematode, Heterodera latipons Franklin, 1969 (Tylenchida: Heteroderidae) is a destructive plant-parasitic nematode on cereal crops in particularly wheat and barley. It has a global distribution with a severe negative impact on yield quantity. In this study, a survey was conducted to identify plant-parasitic nematodes in cereal-growing areas in Cyprus. Forty-five samples including roots and soil from the root zone of plants were collected from cereal fields located in Gazimagusa, Gime, Guzelyurt and Lefkosa Provinces before crop harvesting from late-May and early-June in 2017. Cyst-forming nematodes were determined by Fenwick's flotation and decanting techniques from 37 soil samples (82%). The internal transcribed spacer (ITS) regions of the ribosomal DNA of isolates were amplified and sequenced and subjected to a BLASTn search of the NCBI database for species identification, and the analyses showed that all samples were identified as H. latipons. Phylogenetic analyses based on ITS sequences revealed that H. latipons isolates from Northern Cyprus were closely related to isolates obtained from Morocco, Russia, Syria and Turkey. Data of this study demonstrated for the first time the presence of H. latipons in the cereal fields of Gazimagusa, Gime, Guzelyurt and Lefkosa Provinces, where the nematode most likely causes serious economic problems in the cereal production. These results were the most up-to-dated analyses on the occurrence of H. latipons in cereal fields of Northern Cyprus and provided basic data for breeding programs to improve the resistant levels in the local cultivars.Öğe Identification, distribution and genetic diversity of Globodera rostochiensis (Wollenweber, 1923) Skarbilovich, 1959 (Tylenchida: Heteroderidae) populations in Turkey(Entomological Soc Turkey, Ege Univ, 2020) Altaş, Ahmet; Evlice, Emre; Özer, Göksel; Dababat, Abdelfattah; İmren, MustafaThe golden nematode, Globodera rostochiensis (Wollenweber, 1923) Skarbilovich, 1959 (Tylenchida: Heteroderidae) is one of the most economically important pests of potato in the world. Tests for this nematode are routinely performed for outbreaks and densities in potato growing areas. The morphological and molecular analyses for precise determination of the nematode are employed to establish appropriate management strategies. This study showed that 96% of soil samples obtained from Bozdag and Odemis Districts of Izmir Province, during 2017 and 2018 potato growing seasons, were positive for G. rostochiensis. The mean number of cysts ranged from 0.01 to 3.70 cysts g(-1) soil in the fields examined. The examination of the morphological and morphometric features of the second-stage juveniles and cysts of the G. rostochiensis revealed slight differences among the populations obtained from Bozdag and Odemis. To assess the accuracy of the identification, partial sequences of ribosomal DNA for all populations were amplified, sequenced, and deposited in GenBank. The comparisons of the sequences with those of corresponding G. rostochiensis populations available in GenBank showed 99.89-100% nucleotide similarity. The results of this study will help to better understand the physiology, ecology and biology of the nematode to quarantine this pest more effectively.Öğe Investigation the Efficiency of Resistance Gene, Cre1, Against Mediterranean Cereal Cyst Nematode: Heterodera latipons Franklin (Tylenchida: Heteroderidae)(Ankara Univ, Fac Agr, 2014) Imren, Mustafa; Kasapoglu, Ece Bortecine; Dababat, Abdelfattah; Toktay, Halil; Elekcioglu, Ibrahim HalilCereal cyst nematodes (Heterodera avenae group) are important pests of wheat; they include the three most important species of cereal cyst nematodes: Heterodera avenae Wollenweber, H. latipons Franklin and H. filipjevi (Madzhidov) in Turkey that were determined in different wheat growing areas. It was reported that Mediterranean cereal cyst nematode, Heterodera latipons which is widely found in the centre of the durum wheat growing area -South-eastern Anatolia region-in our country was reaching the economical threshold in many locations. It is known that the use of resistant/tolerant wheat varieties is the most effective controlling method against cyst nematodes in the wheat cultivation. Nowadays, nine different resistance genes (Cre genes), which are transferred from wild wheat species to wheat cultivated forms are available. In this study, the efficiency of the resistance gene, Cre1, against the population of H. latipons from Gaziantep (Karkamis) was investigated. In the study, 38 genotypes carrying Cre1 gene and 26 genomes lacking resistance genes; this gives a total 64 wheat genotypes which are produced by parental crossing of SILVERSTAR containing the resistance gene, Cre1, in its genome, SOKOLL, CALINGIRI, GOLDMARKER, CROC_1/AE.SQUARROSA(224)//OPATA, FRAME, STYLET and PASTOR were used against H. latipons in the experiment. Among the 64 genotypes; 20 were resistant, 32 were moderately resistant and 12 were moderately susceptible to the nematode. Ten resistant, 20 moderately resistant and 8 moderately susceptible lines were determined against H. latipons that these 38 lines carried the Cre1 gene in their genome. Within this study, the resistant gene, Cre1, was not found to be completely resistant against H. latipons, but its 78% efficiency rate was found to be successful: therefore, it was concluded that it can be used against H. latipons in national wheat breeding programs. Furthermore, PASTOR, SOKOLL and CROC_1/AE.SQUARROSA(224)//OPATA wheat genotypes were determined as good resistance source against H. latipons.Öğe Molecular identification and phylogenetic diversity of cereal cyst nematodes (heterodera spp.) populations from Algeria(Organization Trop Amer Nematologists, 2020) Mehalaine, Khawla; İmren, Mustafa; Özer, Göksel; Hammache, M.; Dababat, AbdelfattahCereal cyst nematodes (CCN), Heterodera spp., are the most devastating plant-parasitic nematodes of cereals causing serious global economic losses. In this study, surveys to investigate plant-parasitic nematodes associated with wheat were performed in twenty fields in twelve provinces of Algeria in 2018. Cereal cyst nematodes were found in 41.6% of the investigated wheat fields. Forty-eight CCN populations from twenty locations were obtained and morphologically classified. To confirm the morphological classification, the internal transcribed spacer (ITS) of rDNA was amplified with F194/F195 primers, sequenced, and analyzed using BLASTn searches of the NCBI database. Populations were classified as Heterodera avenae, H. hordecalis, H. carotae, and H. cruciferae. Heterodera carotae and H. cruciferae are reported in Algeria for the first time from two and three surveyed locations, respectively. Heterodera carotae and H. cruciferae were grouped into a well-supported clade and close to populations from Italy and the Netherlands in the phylogenetic tree, respectively. Heterodera hordecalis and H. avenae were found in ten and five fields, respectively. Based on phylogenetic analysis, H. hordecalis showed high similarity to the Israeli population, whereas H. avenae populations from Algeria were found to have high similarity to the Spanish population. Due to the variation among the Algerian populations of H. hordecalis and H. avenae, it can be assumed they have been introduced into Algeria multiple times.Öğe Morphological and molecular identifcation of cereal cyst nematodes from the eastern Mediterranean region of Turkey(2015) Imren, Mustafa; Waeyenberge, Lieven; Viaene, Nicole; Elekcioğlu, Ibrahim Halil; Dababat, AbdelfattahThe morphological and molecular characteristics of 41 populations of cereal cyst nematodes (Heterodera avenae group)collected in Adana, Osmaniye, Kahramanmaraş, Hatay, Gaziantep, and Kilis provinces in the eastern Mediterranean region of Turkeywere studied. Te morphological characters and morphometric features of second-stage juveniles and cysts showed the presence of 3Heterodera species: H. avenae , H. flipjevi, and H. latipons. All morphological values of these distinct populations were very similar tothose previously described for these species. Genetic variation was observed among the identifed cyst nematode species H. avenae, H.flipjevi, and H. latipons. Intraspecifc polymorphism was observed within H. avenae and H. latipons but not in H. flipjevi populations.Molecular analysis using ITS regions of rDNA confrmed the identities of the 3 Heterodera species. According to our results, 75% ofisolates were identifed as H. avenae , 15% as H. latipons, and 10% as H. flipjevi.Öğe Morphological and molecular identification of cereal cyst nematodes from the eastern Mediterranean region of Turkey(2015) İmren, Mustafa; Waeyenberge, Lieven; Vıaene, Nicole; Elekcioğlu, İbrahim Halil; Dababat, AbdelfattahThe morphological and molecular characteristics of 41 populations of cereal cyst nematodes (Heterodera avenae group) collected in Adana, Osmaniye, Kahramanmaraş, Hatay, Gaziantep, and Kilis provinces in the eastern Mediterranean region of Turkey were studied. Te morphological characters and morphometric features of second-stage juveniles and cysts showed the presence of 3 Heterodera species: H. avenae , H. flipjevi, and H. latipons. All morphological values of these distinct populations were very similar to those previously described for these species. Genetic variation was observed among the identifed cyst nematode species H. avenae, H. flipjevi, and H. latipons. Intraspecifc polymorphism was observed within H. avenae and H. latipons but not in H. flipjevi populations. Molecular analysis using ITS regions of rDNA confrmed the identities of the 3 Heterodera species. According to our results, 75% of isolates were identifed as H. avenae , 15% as H. latipons, and 10% as H. flipjevi.Öğe Phenotypic and genotypic characterization of wheat and barley varieties for resistance to cereal cyst nematode (Heterodera latipons)(Springer, 2021) İmren, Mustafa; Özer, Göksel; Duman, Nagihan; Dababat, AbdelfattahThe cereal cyst nematodes (CCN) severely threaten wheat production in many cereal-growing areas around the world as well as in Turkey. The screening of wheat and/or barley varieties for characterization of resistance against CCN is a critical step to develop resistant varieties. The present study describes the phenotyping and genotyping resistance situation of indigenous wheat varieties against one Kilis population of Heterodera latipons. Some barley varieties were also included in the phenotyping test. Among the phenotypically tested wheat varieties, Adana99, Menemen, Troya, Izmir, and Kaklic88 were highly resistant (females/plant < 3) to Kilis population whereas no barley variety was resistant. The microsatellite markers linked to Cre1, Cre3, and Cre5 were detected in the resistant varieties Adana99, Izmir, Ceyhan99, and Ata81, while the presence of Cre8 and CreX genes could not be detected in the varieties tested. As expected, no Cre marker was detected in any barley varieties. The presence of the resistance genes Cre1 and Cre5 in wheat does not adequately suppress the reproduction of H. latipons in Ceyhan99 and Ata81 varieties. The Cre3 gene detected using Xgwm301 marker provides resistance to H. latipons in Izmir and Ziyabey98 wheat varieties. Some Cre genes were detected in some wheat varieties regardless of whether they are phenotypically resistant or not; however, no correlation was found between the presence of any marker and phenotypic resistance.Öğe Plant-parasitic nematodes on cereals in northern Kazakhstan(Springer Heidelberg, 2020) Dababat, Abdelfattah; İmren, Mustafa; Pridannikov, Mikhail; Zhapayev, Rauan; Mokrini, Fouad; Otemissova, Ainur; Özer, GökselPlant-parasitic nematodes (PPNs) are considered serious damaging on the global cereals production systems. The current study was conducted to evaluate the incidence of PPNs in the main cereal-growing areas in northern Kazakhstan. PPNs were detected in about 90% of 78 soil samples and thirteen genera were identified, including Pratylenchus, Heterodera, Geocenamus, Ditylenchus, Helicotylenchus, Rotylenchus, Pratylenchoides, and Tylenchorhynchus. Out of the 78 samples, 32 samples were found infested by Heterodera filipjevi based on the morphological and molecular analysis. To our knowledge, this is the first report on this cereal cyst nematode species in northern Kazakhstan. During the morphological and molecular assays, intraspecific polymorphism was observed within H. filipjevi populations and the populations divided into at least two groups. The highest frequency of infestation of H. filipjevi (76%) was recorded from Kokshetau Province when compared to other provinces: Astana (50%), Petropavl (37%), and Kostanay (16%). The highest number of cysts (30.4) was found among Astana samples while the lowest number of cysts (18.2) was recorded from Kostanay samples. Cyst nematodes can maintain their population above the economic threshold as stimulated by the cereal monoculture system (mainly wheat) which is similar to the cereal production systems of northern Kazakhstan.
