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

By: Iwanaga, M.
Contributor(s): Guevara, E [coaut.] | Jatala, P [coaut.] | Ortiz, R [coaut.].
Material type: materialTypeLabelArticlePublisher: 1989ISSN: 0003-1062.Subject(s): Animals | Aschelminthes | Breeding | Breeding methods | Cecidozoa | Dicotyledons | Helminths | Injurious factors | Invertebrates | Methods | Noxious animals | Pests | Pests of plants | Plant genetics and breeding | Plant nematodes | Progeny forms | Resistance to injurious factors | Solanaceae | Solanum | Taxa | Taxonomy | Tubiflorae | Nematoda AGROVOC | Genetics AGROVOCDDC 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 genesCollection: AGRIS Collection
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Article CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

AGRIS Collection 90-041230 (Browse shelf) Available
Total holds: 0

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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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