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Use of FDR 2n pollen to transfer resistance to root-knot nematodes into cultivated 4x potatoes

By: Contributor(s): Material type: ArticleArticlePublication details: 1989ISSN:
  • 0003-1062
Subject(s): DDC classification:
  • 90-041230
 In: Journal of the American Society for Horticultural Science (USA). (Nov 1989). v. 114(6) p. 1008-1013Summary: Resistance to root-knot nematodes (RKN; Meloidogyne spp.) found in wild potato species Solanum sparsipilum and S. chacoense) was transferred into an advanced 2 x breeding population. Resistant genotypes were crossed with cultivated 2 x clones and simultaneous selection applied for resistance, horticultural traits, and production of first-division restitution 2n pollen. Experiments were conducted to determine if resistant 2 x clones with 2n pollen production would efficiently transmit their resistance to 4 x progenies by means of 4 x x 2 x crosses. More than 2000 seedlings from 40 families derived from 2 x x 2 x , 4 x x 2 x , and 4 x x 4 x crosses were evaluated for resistance. It was found that: 1) 18% of the progeny derived from 4 x (susceptible) x 2 x (resistant) crosses were resistant to RKN. Thus, the 2n pollen producing 2 x clones are valuable genetic material for the production of RKN-resistant 4 x progenies; 2) The existence of resistant 4 x progenies with either S. tuberosum spp. tuberosum or S. demissum cytoplasm indicated that S. sparsipilum cytoplasm was not essential for the expression of the resistance genes
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Item type Current library Collection Call number Status Date due Barcode Item holds
Article CIMMYT Knowledge Center: John Woolston Library AGRIS Collection 90-041230 (Browse shelf(Opens below)) Available
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references

Resistance to root-knot nematodes (RKN; Meloidogyne spp.) found in wild potato species Solanum sparsipilum and S. chacoense) was transferred into an advanced 2 x breeding population. Resistant genotypes were crossed with cultivated 2 x clones and simultaneous selection applied for resistance, horticultural traits, and production of first-division restitution 2n pollen. Experiments were conducted to determine if resistant 2 x clones with 2n pollen production would efficiently transmit their resistance to 4 x progenies by means of 4 x x 2 x crosses. More than 2000 seedlings from 40 families derived from 2 x x 2 x , 4 x x 2 x , and 4 x x 4 x crosses were evaluated for resistance. It was found that: 1) 18% of the progeny derived from 4 x (susceptible) x 2 x (resistant) crosses were resistant to RKN. Thus, the 2n pollen producing 2 x clones are valuable genetic material for the production of RKN-resistant 4 x progenies; 2) The existence of resistant 4 x progenies with either S. tuberosum spp. tuberosum or S. demissum cytoplasm indicated that S. sparsipilum cytoplasm was not essential for the expression of the resistance genes

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