Nematodes which Challenge Global Wheat Production

Smiley, Richard W.; Nıcol, J. M.

doi:10.1002/9780813818832.ch8

Cited by 113 publications

(90 citation statements)

References 93 publications

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Section: Introductionmentioning

confidence: 99%

“…Three species (Heterodera avenae, H. filipjevi and H. latipons) are among the economically most important cyst nematode pests of cultivated cereals (Smiley and Nicol 2009). Heterodera avenae is widely distributed in temperate wheat-producing regions throughout the world (Smiley and Nicol 2009). Heterodera latipons is found in the Mediterranean regions, eastern and northern Europe, the Middle and Near East, North and South Africa, Asia and North America (Greco et al 2002;Abidou et al 2005; Smiley and Nicol 2009), whilst H. filipjevi has been reported from eastern and northern Europe, Central and West Asia, the Middle East, the Indian subcontinent and North America (Rumpenhorst et al 1996;Rivoal et al 2003;Holgado et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of cereal cyst nematodes (Heterodera spp.) in Morocco based on morphology, morphometrics and rDNA-ITS sequence analysis

Mokrını¹,

Viaene²,

Waeyenberge³

et al. 2017

Journal of Plant Protection Research

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Morphological and molecular diversity among 11 populations of cereal cyst nematodes from different wheat production areas in Morocco was investigated using light microscopy, species-specific primers, complemented by the ITS-rDNA sequences. Morphometrics of cysts and second-stage juveniles (J2s) were generally within the expected ranges for Heterodera avenae; only the isolate from Aïn Jmaa showed morphometrics conforming to those of H. latipons. When using species-specific primers for H. avenae and H. latipons, the specific bands of 109 bp and 204 bp, respectively, confirmed the morphological identification. In addition, the internal transcribed spacer (ITS) regions were sequenced to study the diversity of the 11 populations. These sequences were compared with those of Heterodera species available in the GenBank database (www.ncbi.nlm.nih.gov) and confirmed again the identity of the species. Ten sequences of the ITS-rDNA were similar (99-100%) to the sequences of H. avenae published in GenBank and three sequences, corresponding with one population, were similar (97-99%) to H. latipons.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of cereal cyst nematodes (Heterodera spp.) in Morocco based on morphology, morphometrics and rDNA-ITS sequence analysis

Mokrını¹,

Viaene²,

Waeyenberge³

et al. 2017

Journal of Plant Protection Research

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show abstract

“…Heterodera filipjevi (Madzhidov) is one of the three most economically important cereal cyst nematodes (CCN) (McDonald and Nicol, 2005;Smiley & Nicol, 2009). It is a main pest in cereal production in North Europe, America, Middle East and Australia, along with H. avenae (Wollenweber) and H. latipons (Franklin).…”

Section: Introductionmentioning

confidence: 99%

Age structure of populations of the cyst nematode Heterodera Filipjevi (Heteroderidae: Nematoda) on different wheat and barley varieties

Ilieva¹,

Iliev²,

Zarkov³

2016

AgriSci

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Списание Аграрни науки е издание на Аграрния университет -Пловдив. В списанието се публикуват оригинални изследователски статии и обзори от всички области на растениевъдството, растителната защита, екологията, животновъдството, икономиката и туризма на български и на английски език. Agricultural Sciences is a journal of the Agricultural University -Plovdiv. Original research papers and reviews in all the areas of Crop Science, Plant Protection, Ecology, Аnimal Breeding and Husbandry, Economy and Tourism are published in the journal in Bulgarian and in English.Editorial Board Editor-in-Chief -Prof. Ivanka Lecheva, DSc Deputy-Editor-in-Chief -Prof. Diyana Svetleva, DScExecutive Editor -Tania Tsvetkovska th century. Laboratory and field experiments on the seasonal dynamics of the species were conducted. The age structure and the population density of the nematodes were studied during the vegetation period. Delay inthe juvenile development and respectively emergency of white females was observed under both controlled and field conditions in barley for the varieties Aheloy, Veslets, and Obzor and under field conditions only in the Milena wheat variety. MembersThe laboratory tests showed that fodder barley Aheloy was resistant and Veslets and Obzor were moderately susceptible to the nematode. The Mirjana wheat variety demonstrated high susceptibility, whiletherest of the wheat and barley varieties had intermediate position.

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“…Although CCN has caused significant economic losses over the last 40 years (Holgado et al, 2006), relatively few resistance genes have been cloned and characterized. To date, 16 different CCN resistance genes designated as Cre1 to Cre8, CreR, CreX, CreY (Smiley and Nicol, 2009), CreZ (Zhai et al, 2008) and Ha1 to Ha4 (Bakker et al, 2006) have been genetically mapped in wheat and its relatives.…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of a candidate gene for resistance to cereal cyst nematode from Aegilops variabilis in China

Xu¹,

Li²,

Long³

et al. 2012

Afr. J. Biotechnol.

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Cereal cyst nematode (CCN) (Heterodera avenae Woll.) is one of the most economically damaging endoparasite pests of wheat worldwide. We isolated and characterized a novel cereal CCN resistance candidate gene, CreV8, from Aegilops variabilis (2n = 28, UUS v S v ). The gene was 3,568 bp long and showed high nucleotide similarity with the known nematode resistance genes Cre3, CreZ, and go35. CreV8 consisted of two exons, one intron and a complete ORF of 2,763 bp. The deduced peptide sequence consisted of 920 amino acid residues and shared 97.83% amino acid identity with Cre3. The sequence harbored a signal peptide domain, a nucleotide-binding ARC (NB-ARC) domain, and a leucine-rich repeat (LRR) domain, all of which are typical characteristics of resistance genes. We proposed the resistance mechanism of CreV8 based on functional analysis and predictions from its conserved domains and tertiary structure. Real-time polymerase chain reaction (PCR) showed that CreV8 was expressed in CCN-inoculated roots of resistant plants, and its expression levels were 2.80 and 27.45 times higher than that in the untreated control at 3 and 11 days post-inoculation, respectively. These results indicate that CreV8 belongs to the nucleotide binding site (NBS)-LRR resistance gene family and that it is a candidate CCN-resistance gene.

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Nematodes which Challenge Global Wheat Production

Cited by 113 publications

References 93 publications

Characterization of cereal cyst nematodes (Heterodera spp.) in Morocco based on morphology, morphometrics and rDNA-ITS sequence analysis

Characterization of cereal cyst nematodes (Heterodera spp.) in Morocco based on morphology, morphometrics and rDNA-ITS sequence analysis

Age structure of populations of the cyst nematode Heterodera Filipjevi (Heteroderidae: Nematoda) on different wheat and barley varieties

Isolation and characterization of a candidate gene for resistance to cereal cyst nematode from Aegilops variabilis in China

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