Cyto-molecular characterization of rDNA and chromatin composition in the NOR-associated satellite in Chestnut (Castanea spp.).

ABSTRACT: The American chestnut (Castanea dentata, 2n = 2x = 24), once known as the "King of the Appalachian Forest", was decimated by chestnut blight during the first half of the twentieth century by an invasive fungus (Cryphonectria parasitica). The Chinese chestnut (C. mollissima, 2n = 2x = 24), in contrast to American chestnut, is resistant to this blight. Efforts are being made to transfer this resistance to American chestnut through backcross breeding and genetic engineering. Both chestnut genomes have been genetically mapped and recently sequenced to facilitate gene discovery efforts aimed at assisting molecular breeding and genetic engineering. To complement and extend this genomic work, we analyzed the distribution and organization of their ribosomal DNAs (35S and 5S rDNA), and the chromati

SUBMITTER: Islam-Faridi N 

PROVIDER: S-EPMC10789788 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature