Figure 6

Structural illustration of the mj-35S rDNA bearing chromosomes of American and Chinese chestnuts. Structural illustration of the mj-35S rDNA homologues of American chestnut (AC) and four unrelated Chinese chestnut seedlings, open-pollinated progeny of parents ‘Veselicky’ (CC1), ‘Don Surrette’ (CC2), ‘AU-Cropper’ (CC3) and ‘Qing’ (CC4); (a) structural morphology of the major NOR (nucleolus organizer region), which is the site of the mj-35S rDNA locus (red signals in ‘b'), a second 5S site (green signal) co-localized distally with the mj-35S rDNA in one homologue with large satellite in CC3 and in both homologues in CC4; SAT satellite, SC secondary constriction, SA short arm, Cen centromere, LA long arm, NOR nucleolus organizing region, Eu euchromatin, He heterochromatin.