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Combined linkage maps and QTLs in sugar beet ( Beta vulgaris L.) from different populations
Author(s) -
Weber W. E.,
Borchardt D. C.,
Koch G.
Publication year - 1999
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1999.tb01513.x
Subject(s) - quantitative trait locus , biology , sugar beet , population , genetic linkage , gene mapping , linkage (software) , genetics , family based qtl mapping , genetic marker , chromosome , gene , agronomy , demography , sociology
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 for the two populations could be detected. The program and the version used strongly influenced the estimated positions of QTLs. There was also a strong interaction with environments.