Genetic variation in natural populations of the cereal cyst nematode (Heterodera avenae Woll.) submitted to resistant and susceptible cultivars of cereals

1996 ◽  
Vol 93-93 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
F. Lasserre ◽  
F. Gigault ◽  
J. P. Gauthier ◽  
J. P. Henry ◽  
M. Sandmeier ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Natural Populations ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae

Genetic variation and population dynamics of the cereal cyst nematode, Heterodera filipjevi in wheat areas of Bolu, Turkey

2017 ◽  
Vol 42 (5) ◽  
pp. 362-369 ◽  
Author(s):  
Mustafa Imren ◽  
Lieven Waeyenberge ◽  
A. Sami Koca ◽  
Nagihan Duman ◽  
Şenol Yildiz ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Genetic Variation ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Filipjevi

Influence of cereal cyst nematode (Heterodera avenae) on wheat yields in South Australia

1981 ◽  
Vol 21 (112) ◽  
pp. 516 ◽  
Author(s):  
AD Rovira ◽  
PG Brisbane ◽  
A Simon ◽  
DG Whitehead ◽  
RL Correll
Keyword(s):  
Wheat Variety ◽  
South Australia ◽  
Field Trials ◽  
Cyst Nematode ◽  
Analysis Of Covariance ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Yield Increase ◽  
Significant Yield ◽  
Yield Responses

Significant yield responses of up to 0.9 t/ha were obtained with the nematicides aldicarb and dibromochloropropane in seven of eleven field trials with the wheat variety, Condor. Both nematicides reduced the numbers of white cysts of Heterodera avenae on the roots of wheat. With aldicarb the increase in wheat yields varied directly as the decrease in white cysts: dibromochloropropane gave similar increases in yield as aldicarb with a greater reduction in cyst numbers. There was no yield increase with either nematicide when cereal cyst nematode was not present. An analysis of covariance indicated that over all the sites 64% of the increase in yield due to aldicarb could be explained in terms of cysts of cereal cyst nematode.

scholarly journals Discovery of Heterodera filipjevi in Washington and Comparative Virulence with H. avenae on Wheat

Plant Disease ◽  
2015 ◽  
Vol 99 (3) ◽  
pp. 376-386 ◽  
Author(s):  
Richard W. Smiley ◽  
Guiping Yan
Keyword(s):  
United States ◽  
The United States ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Management Guidelines ◽  
Polymerase Chain ◽  
Species Specific ◽  
Eastern Washington ◽  
Cyst Morphology

The cereal cyst nematode Heterodera avenae suppresses wheat production in the western United States. A second species of cereal cyst nematode, H. filipjevi, was identified in eastern Oregon during 2008. This paper reports the discovery of H. filipjevi–infested fields in eastern Washington, thereby extending the known distribution of H. filipjevi in the United States. The identity of H. filipjevi was determined and confirmed by species-specific polymerase chain reaction (PCR), PCR-restriction fragment length polymorphism (RFLP), sequencing, and cyst morphology. Soils that were collected from naturally infested fields in Washington were used to compare the virulence of H. avenae and H. filipjevi on six spring wheat cultivars under controlled-environment conditions. Noninfested soils from nearby fields were used as controls. Cultivars Ouyen and WB Rockland were resistant to H. avenae and susceptible to H. filipjevi. Cultivars Sönmez and SY Steelhead were resistant to H. filipjevi and susceptible to H. avenae. Cultivars Louise and WB 936 were susceptible to both species. The resistance of SY Steelhead to ‘H. avenae’, reported in a previous paper, is corrected as resistance to H. filipjevi due to an earlier misidentification of H. filipjevi. Management guidelines that include crop rotations and resistant cultivars are presented. Discovery of additional infestations of H. filipjevi are anticipated when DNA-based tests become used routinely in commercial diagnostic laboratories.

Resistance of wheat, barley and oat to Heterodera avenae in the Pacific Northwest, USA

Nematology ◽  
2011 ◽  
Vol 13 (5) ◽  
pp. 539-552 ◽  
Author(s):  
Richard W. Smiley ◽  
Guiping Yan ◽  
John N. Pinkerton
Keyword(s):  
Resistance Gene ◽  
Pacific Northwest ◽  
Resistance Genes ◽  
Cyst Nematode ◽  
Cereal Cyst Nematode ◽  
Heterodera Avenae ◽  
Wheat Cultivars ◽  
The Pacific ◽  
The Usa ◽  
Breeding Programmes

Abstract The cereal cyst nematode, Heterodera avenae, occurs in at least seven western states of the USA and reduces grain yield in localised regions and in selected crop management systems. Virulence phenotypes for H. avenae populations in North America have not been reported. Nine individual assays in six experiments were conducted to determine the reactions of barley, oat and wheat cultivars to five H. avenae populations in the Pacific Northwest (PNW) states of Idaho, Oregon and Washington. Three populations were evaluated for virulence to 23 entries of the 'International Test Assortment for Defining Cereal Cyst Nematode Pathotypes', plus selected local cultivars and entries representing a greater diversity of resistance genes. The virulence phenotype(s) for populations of H. avenae in the PNW did not correspond to any of the 11 pathotypes defined by the Test Assortment. Five PNW populations exhibited affinities with Group 2 but were not defined by pathotypes Ha12 and Ha22. Reproduction was prevented or greatly inhibited by barley carrying the Rha3 resistance gene and by most carriers of Rha2 resistance, and by selected oat cultivars with multigenic resistance. Wheat cultivars carrying the Cre1 resistance gene were highly effective in suppressing H. avenae reproduction. Current PNW wheat cultivars do not carry the Cre1 resistance gene. Crosses between Ouyen, an Australian bread wheat with Cre1 resistance, and several PNW wheat cultivars were resistant. The CreR gene also prevented H. avenae reproduction in the trial where it was tested. Intermediate levels of reproduction occurred on wheat cultivars carrying the Cre5, Cre7 and Cre8 resistance genes, each of which was considered useful for pyramiding into cultivars with Cre1 resistance. This research identified genetic resources of value in PNW cereal crop breeding programmes.

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