Euphytica (1995) 83, 71-78

Charles R. Brown, Hassan Mojtahedi and Gerald S. Santo (1995)
Introgression of resistance to Columbia and Northern root-knot nematodes from Solanum bulbocastanum into cultivated potato
Euphytica 83 (1), 71-78
Abstract: Resistance to Meloidogyne chitwoodi races 1 (MC1) and 2 (MC2) and M. hapla (MH) derived from Solanum bulbocastanum was introduced into the cultivated potato gene pool through somatic fusion. The initial F₁ hybrids showed resistance to the three nematodes. Resistance to reproduction on roots by MC1 was accompanied by resistance to tuber damage in F₁ clones. Tuber damage sometimes occurred, however, in hybrids of BC₁ progeny resistant to reproduction on roots when MC2 and MH were the challenging nematodes. Resistance to reproduction was transferred into BC₁ individuals, but a greater proportion of BC₁ progeny was resistant to MC1 than to MC2 or MH. Resistance to MC1 appears to be dominant and discretely inherited. F₁ and BC₁ progeny were pollen sterile, but seed were produced from crosses using cultivated tetraploid pollen sources. Approximately 11 and 33 per cent of pollinations produced berries on F₁ and BC₁ pistillate parents, respectively. Seed yield increased fourfold overall in crosses with F₁ compared to BC₁ individuals.
(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): Charles Brown

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne chitwoodi	Potato (Solanum tuberosum)
	Meloidogyne hapla	Potato (Solanum tuberosum)