Original Paper

Theoretical and Applied Genetics

, Volume 101, Issue 1, pp 292-300

Linkage mapping and QTL analysis in coconut (Cocos nucifera L.)

  • A. HerránAffiliated withNeiker, Apartado 46, 01080 Vitoria, Spain Fax: +34945-281422 e-mail: eritter@neiker.net
  • , L. EstiokoAffiliated withPCA-Albay Research Centre, Guinobatan, Albay 4503, Philippines
  • , D. BeckerAffiliated withMPI für Züchtungsforschung, Carl-von-Linné-Weg 10, 50829 Köln, Germany
  • , M. J. B. RodriguezAffiliated withPCA-Albay Research Centre, Guinobatan, Albay 4503, Philippines
  • , W. RohdeAffiliated withMPI für Züchtungsforschung, Carl-von-Linné-Weg 10, 50829 Köln, Germany
  • , E. RitterAffiliated withNeiker, Apartado 46, 01080 Vitoria, Spain Fax: +34945-281422 e-mail: eritter@neiker.net

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Abstract 

Different DNA marker types were used to construct linkage maps in coconut (Cocos nucifera L.; 2n = 32) for the two parents of the cross Malayan Yellow Dwarf (MYD) × Laguna Tall (LAGT). A total of 382 markers was sufficient to generate 16 linkage groups for each parent. The total genome length corresponded to 2226 cM for the LAGT map and 1266 cM for the MYD map with 4–32 markers per linkage group. Common markers allowed the association of 9 linkage groups for the two parents MYD and LAGT. QTL analysis for the trait early germination identified six loci. These QTLs correlate with early flowering and yield, representing characters which are important in coconut breeding. The co-segregation of markers with these QTLs provides the first opportunity for marker-assisted selection in coconut breeding programmes.

Key words AFLP DNA markers Early germination ISSR ISTR RAPD