Abstract
A consensus genetic linkage map with 447 SSR markers was constructed for zoysiagrass (Zoysia japonica Steud.), using 86 F1 individuals from the cross ‘Muroran 2’ × ‘Tawarayama Kita 1’. The consensus map identified 22 linkage groups and had a total length of 2,009.9 cM, with an average map density of 4.8 cM. When compared with a previous AFLP-SSR linkage map, the SSR markers from each linkage group mapped to similar positions in both maps. Eight pairs of linkage groups from the AFLP-SSR map were joined into eight new groups in the current map. This zoysiagrass consensus map contained 35 SSR markers exhibiting high homology with rice genomic sequences from known chromosomal locations. This allowed synteny to be identified between Zoysiagrass linkage groups 2, 3, 9, 19 and rice chromosomes 3, 12, 2, 7 respectively. These results provide important comparative genomics information and the new map is now available for quantitative trait locus analysis, marker-assisted selection and breeding for important traits in zoysiagrass.
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