Genetic diversity and linkage disequilibrium analysis in elite sugar beet breeding lines and wild beet accessions

I. Adetunji, G. Willems, H. Tschoep, A. Bürkholz, S. Barnes, M.P. Boer, M. Malosetti, S. Horemans, F. van Eeuwijk

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

Linkage disequilibrium decay in sugar beet is strongly affected by the breeding history, and varies extensively between and along chromosomes, allowing identification of known and unknown signatures of selection. Genetic diversity and linkage disequilibrium (LD) patterns were investigated in 233 elite sugar beet breeding lines and 91 wild beet accessions, using 454 single nucleotide polymorphisms (SNPs) and 418 SNPs, respectively. Principal coordinate analysis suggested the existence of three groups of germplasm, corresponding to the wild beets, the seed parent and the pollen parent breeding pool. LD was investigated in each of these groups, with and without correction for genetic relatedness. Without correction for genetic relatedness, in the pollen as well as the seed parent pool, LD persisted beyond 50 centiMorgan (cM) on four (2, 3, 4 and 5) and three chromosomes (2, 4 and 6), respectively; after correction for genetic relatedness, LD decayed after
Original languageEnglish
Pages (from-to)559-571
JournalTheoretical and Applied Genetics
Volume127
Issue number3
DOIs
Publication statusPublished - 2014

Keywords

  • beta-vulgaris l.
  • genome-wide association
  • yellow-vein-virus
  • population-structure
  • ssp maritima
  • rhizomania resistance
  • restorer gene
  • markers
  • map
  • dna

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