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Euphytica

, Volume 5, Issue 1, pp 51–54 | Cite as

Problems of heat spot in fragaria vesca L. when indexing strawberry selections for viruses

  • L. Smeets
  • L. M. Wassenaar
Article

Summary

In view of the available labour the testing of strawberry selections for viruses by runner grafting is carried out in autumn and winter. In order to obtain sufficient runners on the test plants these tests were carried out at a constant temperature of 23°C. At this temperature, however, the indicator plants (Fragaria vesca) developed “heat spot”. The symptoms are reminiscent of virus-infection, which makes it difficult to decide whether the test plant carries a virus or not.

It was found that heat spot symptoms became less distinct at a constant temperature of 17°C, and were absent on newly developed leaves. Consequently the indicator plants were transferred to 17°C after 2 successful unions had been obtained at 23°C. In this way it was possible to obtain a reliable impression of the state of health of the test plant.

Keywords

Plant Physiology Constant Temperature Test Plant Indicator Plant Successful Union 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Samenvatting

Het toetsen van aardbeiselecties op virusziekten door middel van de stolonenentingsmethode wordt in verband met de werkverdeling in de herfst en wintermaanden uitgevoerd. Teneinde over voldoende uitlopers aan de te toetsen planten te kunnen beschikken, wordt deze toets uitgevoerd bij een constante temperatuur van 23°C. Bij deze temperatuur treedt er echter in de indicatorplanten (Fragaria vesca) “heat spot” op. De symptomen doen denken aan een virusinfectie waardoor het moeilijk wordt uit te maken of de te toetsen plant een virus bevat of niet.

Gebleken is dat de heat spot symptomen bij een constante temperatuur van 17°C vervagen, terwijl de aldaar ontplooide bladeren geen heat spot meer vertonen. Derhalve worden de indicatorplanten, nadat er twee geslaagde entingen zijn verkregen bij 23°C, overgebracht naar 17°C. Aldus was het mogelijk een betrouwbare indruk van de gezondheidstoestand van de te toetsen selecties te verkrijgen.

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Literature cited

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Copyright information

© Dr. H. De Haan 1956

Authors and Affiliations

  • L. Smeets
    • 1
  • L. M. Wassenaar
    • 1
  1. 1.Institute of Horticultural Plant BreedingWageningenNetherlands

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