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The Influence of Resistant Potato Varieties On the Soil Population of Heterodera Rostochiensis Woll. Ii

The Influence of Resistant Potato Varieties On the Soil Population of Heterodera Rostochiensis... THE INFLUENCE OF RESISTANT POTATO VARIETIES ON THE SOIL POPULATION OF HETERODERA ROSTOCHIENSIS WOLL. II BY C. A. HUIJSMAN Foundation for Agricultural Plant Breeding, Wageningen, The Netherlands Resistant potatoes bred from Solanum tuberosum subsp. andigena, C.P.C. 1673 were grown continuously for 8 years on an experimental field. At the end of this period the larval population was increasing rapidly. This means that at the beginning of the experiment there was already present in the initial population a low frequency of genes governing aggressiveness towards these potatoes. The practical possibilities of growing resistant varieties depends mainly on the genetic composition, with respect to the genes for aggressiveness, of those populations which by rough methods are found to be A-populations. Earlier (Huijsman, 1961) the results of a field experiment on the influence of growing resistant potato varieties on a population of H eterodera rostochiensl,v were described. These results were then explained by the hypothesis that growing resistant varieties for many consecutive years on a field infested by an A-popu- lation did not lead to the disappearance of the parasite, but that a small number of very irregularly distributed potato-root eelworms remained in the field. The average of the distribution of http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Influence of Resistant Potato Varieties On the Soil Population of Heterodera Rostochiensis Woll. Ii

Huijsman, C.A.
Nematologica , Volume 9 (3): 3 – Jan 1, 1963
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529263X00881
Publisher site
See Article on Publisher Site

Abstract

THE INFLUENCE OF RESISTANT POTATO VARIETIES ON THE SOIL POPULATION OF HETERODERA ROSTOCHIENSIS WOLL. II BY C. A. HUIJSMAN Foundation for Agricultural Plant Breeding, Wageningen, The Netherlands Resistant potatoes bred from Solanum tuberosum subsp. andigena, C.P.C. 1673 were grown continuously for 8 years on an experimental field. At the end of this period the larval population was increasing rapidly. This means that at the beginning of the experiment there was already present in the initial population a low frequency of genes governing aggressiveness towards these potatoes. The practical possibilities of growing resistant varieties depends mainly on the genetic composition, with respect to the genes for aggressiveness, of those populations which by rough methods are found to be A-populations. Earlier (Huijsman, 1961) the results of a field experiment on the influence of growing resistant potato varieties on a population of H eterodera rostochiensl,v were described. These results were then explained by the hypothesis that growing resistant varieties for many consecutive years on a field infested by an A-popu- lation did not lead to the disappearance of the parasite, but that a small number of very irregularly distributed potato-root eelworms remained in the field. The average of the distribution of

Journal

Nematologica – Brill

Published: Jan 1, 1963

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