Biological characterisation of Globodera pallida from Idaho

Nematology ◽  
2012 ◽  
Vol 14 (7) ◽  
pp. 817-826 ◽  
Author(s):  
Vivian C. Blok ◽  
Mark S. Phillips
Keyword(s):  
Cyst Nematode ◽  
Globodera Pallida ◽  
South American ◽  
White Potato ◽  
Virulence Pattern ◽  
The Usa ◽  
Solanum Vernei ◽  
Morphometric Assessment ◽  
Virulence Group ◽  
Highly Virulent

The white potato cyst nematode, Globodera pallida, was recently found in the USA and was identified using molecular and morphometric assessment. This paper examined some biological characteristics of the Idaho population of G. pallida. The samples of the original cysts showed that they had low rates of juvenile hatch and, consequently, low rates of reproduction when compared with glasshouse-reared populations. Virulence tests using sources of partial resistance from Solanum vernei and S. tuberosum ssp. Andigena CPC 2802 compared the Idaho population to European and South American populations of G. pallida. The Idaho population showed a virulence pattern comparable to other European populations in the Pa2/3 virulence group. The overall level of reproduction of the Idaho population on the resistant cultivars was the lowest of all the populations tested, suggesting that it is not highly virulent. These results are compatible with molecular characterisation, which indicates that this population is similar to the European gene pool.

General and specific combining ability of potato parents for resistance to the white potato cyst nematode (Globodera pallida)

1979 ◽  
Vol 92 (1) ◽  
pp. 255-256 ◽  
Author(s):  
M. S. Phillips ◽  
Linda A. Wilson ◽  
J. M. S. Forrest
Keyword(s):  
Combining Ability ◽  
Potato Breeding ◽  
General Combining Ability ◽  
Cyst Nematode ◽  
Potato Cyst Nematode ◽  
Globodera Pallida ◽  
Specific Combining Ability ◽  
Breeding Programme ◽  
White Potato ◽  
Solanum Vernei

The practical value of obtaining estimates of general combining ability (GCA) from data accumulated in a breeding programme has been discussed by Gilbert (1967). In this study use has been made of data collected during the course of screening potato breeding material, derived from Solanum vernei Bitt. et Wittm., for resistance to the white potato cyst nematode, Qlobodera pallida (Stone) Mulvey & Stone, to assess the relative contributions of GCA and specific combining ability (SCA) by the procedure described by England (1974) which is based on Gilbert's (1967) method.

An investigation of resistance to the white potato cyst-nematode

1982 ◽  
Vol 99 (2) ◽  
pp. 325-328 ◽  
Author(s):  
M. F. B. Dale ◽  
M. S. Phillips
Keyword(s):  
Solanum Tuberosum ◽  
Major Gene ◽  
Cyst Nematode ◽  
Potato Cyst Nematode ◽  
Globodera Pallida ◽  
Screening Methods ◽  
Inheritance Of Resistance ◽  
White Potato

SUMMARYThe inheritance of resistance to Globodera pallida was studied in seedling progenies derived from Solanum tuberosum ssp. andigena CPC 2802 (H3) and S. vernei and compared with resistance to G. rostochiensis derived from S. tuberosum ssp. andigena CPC 1673(H1). The resistance of CPC 2802 was originally thought to be due to a major gene (H3), but results presented here demonstrate that it and that derived from S. vernei are inherited in a similar manner quite distinct from the major gene inheritance from CPC 1673 (HI). It is concluded that the resistances derived from CPC 2802 and S. vernei are both polygenic in nature. These findings are discussed in relation to breeding policy and screening methods.

scholarly journals Monosaccharide constituents of potato root exudate influence hatching of the white potato cyst nematode

2021 ◽  
Author(s):  
Christopher A Bell ◽  
Waddah Mobayed ◽  
Catherine J Lilley ◽  
Peter Urwin
Keyword(s):  
Root Exudate ◽  
Cyst Nematode ◽  
Potato Cyst Nematode ◽  
Globodera Pallida ◽  
Parasitic Nematodes ◽  
Infested Soil ◽  
Plant Parasitic Nematodes ◽  
Potato Root ◽  
White Potato ◽  
Management Schemes

Plants secrete a large array of compounds into the rhizosphere to facilitate interactions with their biotic environment. Some of these exuded-compounds stimulate the hatching of obligate plant-parasitic nematodes, ultimately leading to a detrimental effect on the host plant. Determining these cues can help to provide new mechanisms for control and aid nematode management schemes. Here we show that glucose, fructose and arabinose, which are all present in potato root exudate (PRE), induce hatching of white potato cyst nematode (Globodera pallida) eggs whereas five other PRE-sugars had no effect. Although these monosaccharides resulted in significant hatching none induced the same level as PRE, suggesting that other components, possibly in combination, contribute to stimulation of nematode hatching. Glucose, but not arabinose or fructose, was also observed to attract juvenile G. pallida, indicating that these hatch-inducing components can have different roles in different stages of the life cycle. Applying a solution of these monosaccharides to G. pallida-infested soil pre-potato planting initiated hatching in the absence of a host. Host absence resulted in nematode mortality and a reduction in the G. pallida population. Therefore, subsequent invasion of the crop post-planting was also reduced, compared to untreated soil. Our data suggest that monosaccharide components of PRE play an important role in the hatching and attraction of G. pallida. As a result the hatch-inducing monosaccharides can be applied as a pre-planting treatment to induce hatching and reduce subsequent infection rates.  

Novel Bioassay Demonstrates Attraction of the White Potato Cyst Nematode Globodera Pallida (Stone) to Non-volatile and Volatile Host Plant Cues

2012 ◽  
Vol 38 (6) ◽  
pp. 795-801 ◽  
Author(s):  
Kevin Farnier ◽  
Marie Bengtsson ◽  
Paul G. Becher ◽  
Johanna Witzell ◽  
Peter Witzgall ◽  
...  
Keyword(s):  
Host Plant ◽  
Cyst Nematode ◽  
Potato Cyst Nematode ◽  
Globodera Pallida ◽  
White Potato
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