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Comparison of crossover frequency (cM/Mb) in wild type, recq4a recq4b and HEI10 , generated by SSLP mapping in Col/Ler F 2 populations. The position of the CTL3.9 T-DNAs is indicated by green and red vertical lines. The density of CEN178 on the forward (red) and reverse (blue) strands are plotted. Crossover counts per interval were compared between genotypes using chi-square tests. Asterisks indicate intervals that had significantly different counts between wild type and HEI10 or recq4a recq4b

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