Construction of a linkage map of the Rennell Island Tall coconut type (Cocos nucifera L.) and QTL analysis for yield characters

AFLP and SSR DNA markers were used to construct a linkage map in the coconu t (Cocos nucifera L.; 2n = 32) type Rennell Island Tall (RIT). A total of 2 27 markers were arranged into 16 linkage groups. The total genome length co rresponded to 1971 cM for the RIT map, with 5-23 markers per linkage group. QTL analysis for yield characters in two consecutive sampling periods iden tified nine loci. Three and two QTLs were detected for number of bunches an d one and three QTLs for number of nuts. The correlation of trait values be tween characters and evaluation periods is partially reflected in identical QTLs. The QTLs represent characters that are important in coconut breeding . The cosegregation of markers with these QTLs provides an opportunity for marker-assisted selection in coconut breeding programmes.