Journal ArticleDOI
RFLP mapping on potato chromosomes of two genes controlling extreme resistance to potato virus X (PVX).
TLDR
Two different chromosomal locations of major genes controlling extreme resistance to potato virus X (PVX) were found by restriction fragment length polymorphism (RFLP) analysis of two populations segregating for the resistance.Abstract:
Two different chromosomal locations of major genes controlling extreme resistance to potato virus X (PVX) were found by restriction fragment length polymorphism (RFLP) analysis of two populations segregating for the resistance. The resistance geneRx1 mapped to the distal end of chromosome XII, whereasRx2 was located at an intermediate position on linkage group V in a region where reduced recombination and segregation distortion have also been observed. These linkage anomalies were due to abnormal behaviour of the chromosome contributed by the resistant parent P34. The results presented were obtained using two different strategies for mapping genes of unknown location. One approach was the use of probes revealing polymorphic loci spread throughout the genome and resulted in the mapping ofRx1. The second approach was based on the assumption of possible linkage between the resistance gene and clone-specific DNA fragments introduced from a wild potato species.Rx2 was mapped by adopting this strategy.read more
Citations
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Journal ArticleDOI
A PCR-based approach for isolating pathogen resistance genes from potato with potential for wide application in plants
TL;DR: The results indicate that plant resistance genes that are effective against nematodes, fungi andviruses and bacteria may be isolated based on common sequence motifs and PCR methodology.
Journal ArticleDOI
Qtl mapping and quantitative disease resistance in plants
TL;DR: These studies provide insights into the number of quantitative resistance loci involved in complex disease resistance, epistatic and environmental interactions, race-specificity of partial resistance locu, interactions between pathogen biology, plant development and biochemistry, and the relationship between qualitative and quantitative loci.
Journal ArticleDOI
Organization of genes controlling disease resistance in the potato genome
TL;DR: It is proposed that some QTL for resistance have a molecular basis similar to single R genes, and genes having structural similarity with cloned R genes and genes involved in the defense response are proposed.
Journal ArticleDOI
Genetics of Plant Virus Resistance
TL;DR: This chapter has catalogued genes for resistance to plant viruses and has summarized current knowledge regarding their identity and inheritance, and the genetic context, genomic organization, mechanisms of resistance and agricultural deployment of plant virus resistance genes are discussed.
Journal ArticleDOI
The R1 gene for potato resistance to late blight (Phytophthora infestans) belongs to the leucine zipper/NBS/LRR class of plant resistance genes.
Agim Ballvora,Maria Raffaella Ercolano,Julia Weiss,Khalid Meksem,Christina Angelika Bormann,Petra Oberhagemann,Francesco Salamini,Christiane Gebhardt +7 more
TL;DR: It is shown that R1, the first gene for resistance to late blight, is cloned by combining positional cloning with a candidate gene approach, and is located within a hot spot for pathogen resistance on potato chromosome V.
References
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Journal ArticleDOI
The estimation of map distances from recombination values.
TL;DR: The genetic map is a tool to quantify the distance between genes on a chromosome, based on the observed frequency of crossovers during cell division, which is used to estimate the total distance between chromosomes.
Journal ArticleDOI
RFLP Maps Based on a Common Set of Clones Reveal Modes of Chromosomal Evolution in Potato and Tomato.
TL;DR: Linkage maps based on a common set of restriction fragment length polymorphism markers provide a basis for uniting the previously separate disciplines of tomato and potato genetics and may now be possible to test theories about homologies or orthologies of other genes, including those coding for disease resistance and stress tolerances.
Book
Potato Breeding Problems and Perspectives
TL;DR: In this article, der derzeitige Stand der Kartoffelzuechtung dargestellt wurde dargested, in denen neue Strategien bereits zu Erfolgen gefuehrt haben oder sie in nicht zu ferner Zukunft erwarten lassen: analytisch-synthetischer Genomaufbau durch Verwendung von Mono- und Dihaploiden with Fremdgenen, weiterhin somatische Hybridis
Journal ArticleDOI
RFLP analysis and linkage mapping in Solanum tuberosum
Christiane Gebhardt,Enrique Ritter,Thomas Debener,U. Schachtschabel,Birgit Walkemeier,H. Uhrig,Francesco Salamini +6 more
TL;DR: A morphologically and agronomically heterogeneous collection of 38 diploid potato lines was analysed for restriction fragment length polymorphisms (RFLPs) with 168 potato probes, including random genomic and cDNA sequences as well as characterized potato genes of known function.
Journal ArticleDOI
Genetical studies on resistance to Potato viruses X and Y.
TL;DR: The present investigations concern resistance (immunity) to potato virus X and/or potato virus Y and necrotic hypersensitivity, a basis of resistance to these viruses, and there is a consensus of evidence that each form of response is under single gene control.