Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 497801
Title The double-reduction landscape in tetraploid potato as revealed by a high-density linkage map
Author(s) Bourke, P.M.; Voorrips, R.E.; Visser, R.G.F.; Maliepaard, Chris
Source Genetics 201 (2015)3. - ISSN 0016-6731 - p. 853 - 863.
DOI https://doi.org/10.1534/genetics.115.181008
Department(s) Laboratory of Plant Breeding
WUR PB Kwantitatieve Aspecten
PE&RC
EPS
PBR Kwantitatieve Aspecten
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) Double reduction - Linkage mapping - Multivalents - Potato - Tetraploid
Abstract

The creation of genetic linkage maps in polyploid species has been a long-standing problem for which various approaches have been proposed. In the case of autopolyploids, a commonly used simplification is that random bivalents form during meiosis. This leads to relatively straightforward estimation of recombination frequencies using maximum likelihood, from which a genetic map can be derived. However, autopolyploids such as tetraploid potato (Solanum tuberosum L.) may exhibit additional features, such as double reduction, not normally encountered in diploid or allopolyploid species. In this study, we produced a high-density linkage map of tetraploid potato and used it to identify regions of double reduction in a biparental mapping population. The frequency of multivalents required to produce this degree of double reduction was determined through simulation. We also determined the effect that multivalents or preferential pairing between homologous chromosomes has on linkage mapping. Low levels of multivalents or preferential pairing do not adversely affect map construction when highly informative marker types and phases are used. We reveal the double-reduction landscape in tetraploid potato, clearly showing that this phenomenon increases with distance from the centromeres.

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