Abstract
Forty-two G. herbaceum cultivars available in Iran National Gene Bank were analysed karyologically showing 2n=26 chromosome number. The cultivars varied with regard to number of SAT-chromosomes and chromosomes carrying secondary constrictions. Karyotypes were of symmetrical type having small chromosomes. Factorial analysis showed significant difference for both the cultivars as well as chromosomes.Cluster analysis using UPGMA, single linkage and complete linkage methods grouped the cultivars in six distinct clusters. Principal coordinate analysis supports the clustering results and principal component analysis showed that chromosomes 4 to 10 and long arms of the chromosomes 2, 8, 10 and 13 and short arms of the chromosomes 3, 7 and 8 are the most variable chromosomes/chromosome arms among the cultivars studied.Present work indicates genomic differences among diploid G. herbaceum cultivars of Iran which can be used in hybridization programs. Crossing of the cultivars placed in distant clusters are suggested.
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