Plant Pathology (2008) 57, 573-580

M.S. Phillips and V.C. Blok (2008)
Selection for reproductive ability in Globodera pallida populations in relation to quantitative resistance from Solanum vernei and S. tuberosum ssp. andigena CPC2802
Plant Pathology 57 (3), 573-580
Abstract: Four field populations of the nematode Globodera pallida were subjected to selection pressure for increased reproductive ability by rearing sub-populations continuously on four partially resistant potato genotypes for 12 generations. The resistance was derived from either Solanum vernei or from S. tuberosum spp. andigena CPC2802. After the 12th generation the original and sub-populations of nematodes were assessed for their reproductive ability on a susceptible genotype and on each of the partially resistant genotypes. Selection pressure was shown to have increased reproductive ability but the increases were specific to the source of resistance used. The average increase on the ex S. vernei clones was from 11% reproduction by the unselected populations to 35·5% reproduction after selection. On the clones derived from CPC2802, which had higher levels of resistance, the increases were larger with an average of 6·6% reproduction for the unselected but 47·4% reproduction after selection. The response to selection differed amongst the initial field populations with some rates of reproduction increased to as much as 79%. A RAPD based analysis of the original and sub-populations after selection indicated small but consistent changes in the genetic structure, which could have been a result of the selection pressure per se and/or the bottlenecks that the populations had gone though.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Vivian C. Blok

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Globodera pallida	Potato (Solanum tuberosum)