engleski

SSR variation in M3S maize population and its progenitors

Information on genetic diversity between inbred lines and populations has been considered as a possible avenue for predicting heterosis and hybrid performance in maize. Aim of this study was to determine genetic relationship among the Maksimir 3 Synthetic (M3S) maize population parental inbred lines (progenitors) and of the M3S population itself to elite inbred lines representing the BSSS and Lancaster heterotic groups. Nine M3S progenitors, three BSSS lines, and three Lancaster lines were genotyped at 24 SSR loci, out of which nine loci were used for genotyping 96 individuals from M3S population before and after two cycles of recurrent selection. A total of 101 alleles were detected across all loci in the 15 lines, whereas 83 alleles were found in the nine M3S progenitors. Among the latter 83 alleles 31 were found only in one of the progenitors. Mean genetic distance among nine M3S progenitors was 0.61 indicating a broad genetic base of the M3S population. High mean genetic distance was observed between M3S parental lines and BSSS lines (0.69) and M3S parental lines and Lancaster lines (0.71), which indicates that the M3S population represents germplasm source unrelated to the BSSS and Lancaster germplasm. Mean genetic distance of the M3S population and BSSS and Lancaster lines slightly decreased after two cycles of recurrent selection. This suggests the need of introducing testers from both groups in future selection in the M3S population in order to maintain heterotic complementarity of the M3S population to these groups

SSR; Maize; Heterotic groups

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