Abstract
The genetic linkage map is important for peanut molecular breeding. Construction of integrating genetic linkage map using multiple populations is an effective approach to increase the marker density of map. Three maps were constructed with three F2 populations, respectively in the present study. Based on anchored SSR markers in the three maps, we constructed a new map with 792 SSR loci and total map distance of 2079.50 cM (the average distance is 2.63 cM). The length of linkage groups varied from 59.10 to 175.80 cM, and the number of markers was from 20 to 66 in the integrated linkages groups. Comparing the intervals of QTLs linked to the pod size and seed size in the three F2 populations with the markers in the integrated linkage groups, all the QTLs linked to the pod size and seed size could be found in the integrated map. Some intervals of QTLs had more markers in the integrated map than in the F2 linkage groups in the present study. The markers in the intervals of QTLs of the integrated map could be used for fine mapping.
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