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

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.

Plant Disease ◽  
2018 ◽  
Vol 102 (8) ◽  
pp. 1671-1671 ◽  
Author(s):  
H. Mburu ◽  
L. Cortada ◽  
G. Mwangi ◽  
K. Gitau ◽  
A. Kiriga ◽  
...  

Nematology ◽  
2012 ◽  
Vol 14 (7) ◽  
pp. 869-873 ◽  
Author(s):  
Ayano Sasaki-Crawley ◽  
Rosane Curtis ◽  
Michael Birkett ◽  
Apostolos Papadopoulos ◽  
Rod Blackshaw ◽  
...  

This paper demonstrates a simple novel in vitro method using Pluronic F-127 aqueous solution to study the development of the potato cyst nematode, Globodera pallida, in Solanum spp. without any need for sterilisation of either the plants or the nematodes. In this study, this method was successfully applied to comparative studies on the development of G. pallida in Solanum tuberosum (potato) or S. sisymbriifolium (sticky nightshade). The protocol described here could be useful for screening transgenic plants or different plant cultivars/species for their ability to allow development not only of G. pallida but also any other plant-parasitic nematodes.


Nematology ◽  
2017 ◽  
Vol 19 (6) ◽  
pp. 739-747 ◽  
Author(s):  
Patrick M. Norshie ◽  
Ivan G. Grove ◽  
Matthew A. Back

As part of a broader study to evaluate the efficacy of fluensulfone for control of the potato cyst nematode,Globodera pallida, two field experiments in Shropshire (at Woodcote and Howle in 2010 and 2011, respectively) England, were used to monitor the persistence of fluensulfone in potato beds treated with Nimitz 15G®(fluensulfone) at 27 kg ha−1. Fluensulfone dissipated at similar rates in the two fields, with a trend best described by a sigmoidal curve. The time to 50% dissipation (DT50) was 24.3 days at Woodcote, and 23.7 days at Howle. No differences were found between the DT50for fluensulfone and that observed for fosthiazate. The short DT50demonstrated for fluensulfone in this study is a positive attribute as this nematicide may pose a negligible hazard to the environment. However, its persistence at an effective dose may be long enough to be effective over the peak hatch period ofG. pallida.


Author(s):  
Christopher A Bell ◽  
Waddah Mobayed ◽  
Catherine J Lilley ◽  
Peter Urwin

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.  


2012 ◽  
Vol 38 (6) ◽  
pp. 795-801 ◽  
Author(s):  
Kevin Farnier ◽  
Marie Bengtsson ◽  
Paul G. Becher ◽  
Johanna Witzell ◽  
Peter Witzgall ◽  
...  

1979 ◽  
Vol 92 (1) ◽  
pp. 255-256 ◽  
Author(s):  
M. S. Phillips ◽  
Linda A. Wilson ◽  
J. M. S. Forrest

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.


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