Abstract
A total of 18 genotypes of broccoli were subjected to random amplified polymorphic DNA (RAPD) and inter-simple sequence repeat (ISSR) marker analysis. Seventy-four RAPD and eight ISSR primers generated 344 and 67 polymorphic bands, respectively. All broccoli genotypes could be distinguished with two-primer combinations, indicating that RAPD and ISSR markers can be used to efficiently identify broccoli cultivars. These 18 broccoli genotypes could be separated into two major sub-groups. The first major sub-group (A) included 13 genotypes and the second major sub-group (B) was comprised of five genotypes belonging to early-maturating cultivars. Genetic diversity analysis was performed on the 18 broccoli genotypes, one radish genotype, and six related Brassica accessions. All accessions could be clustered into two groups (radish and Brassica) based on the unweighted pair group of arithmetic average (UPGMA) cluster analysis. The UPGMA analysis indicated that broccoli is most closely related to cauliflower, than to cabbage and Chinese cabbage.
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