Combined linkage maps and QTLs in sugar beet (Beta vulgaris L.) from different populations

• Published in: Plant breeding Vol. 118; no. 3; pp. 193 - 204
• Main Authors: Weber, W.E, Borchardt, D.C, Koch, G
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.07.1999; Blackwell
• Subjects: Agronomy. Soil science and plant productions; amplified fragment length polymorphism; Beta vulgaris; Beta vulgaris subsp. vulgaris; Biological and medical sciences; chromosome mapping; computer analysis; computer software; crop yield; Cytogenetics; different mapping populations; Fundamental and applied biological sciences. Psychology; Generalities. Genetics. Plant material; genetic markers; genetic recombination; Genetics and breeding of economic plants; isozymes; linkage groups; loci; mapping programs; microsatellite repeats; population; QTL analysis; quantitative traits; restriction fragment length polymorphism; sequence tagged sites; yield; Germany; Europe; Genetic mapping; Linkage; Genetic marker; Chromosome; Beta vulgaris var. saccharata; Sugar plant; Chenopodiaceae; Quantitative genetics; Quantitative trait loci; Dicotyledones; Linkage group; Genetic improvement; Angiospermae; Cytogenetics; Spermatophyta; Yield; Locus
• ISSN: 0179-9541; 1439-0523
• DOI: 10.1111/j.1439-0523.1999.tb01513.x

The construction of genetic maps is an expensive and time-consuming process. The breeder is therefore interested in using maps developed from other mapping populations but this is only possible if the genetic structure is similar for the chromosomal regions of interest. In this paper, maps of three populations of sugar beet (Beta vulgaris L.) with common polymorphic marker loci are compared. Maps were constructed with MAPMAKER 3.0 and JOINMAP 2.0. Both mapping programs gave, in general, the same order for common markers. However, the number of common markers was too low to construct a combined map for all chromosomes. For one population, in contrast to the other two, the map constructed with MAPMAKER 3.0 was much longer than that constructed with JOINMAP 2.0. For two of these populations yield traits were also available from different environments. For quantitative trait loci (QTL) analysis of the yield data, the packages MAPMAKER QTL 1.1 and PLABQTL were used. No QTL common or the two populations could be detected. The program and the version used strongly influenced the estimated position of QTLs. There was also a strong interaction with environments.