MATHEMATICAL-METHODS FOR STUDYING GENES-C ONTROLLING QUANTITATIVE TRAITS

We present in this paper the results of the project ''Mathematics and Molecular Markers'' (MMM). These results concern the identification an d use of genes that control quantitative characters or QTL (quantitati ve trait loci), using phenotypic, genealogical and molecular marker in formation. The first section concerns identification of major genes us ing information of a phenotypic (measures of the character) and geneal ogical (relationships between individuals) type and use of these genes in selection. The second section concerns the use of this information jointly with molecular marker information for detection and localisat ion of QTL, and for genetic improvement.