Abstract
The ascending genome size in Gossypium is assumed to be D, A, B, E and F, and C. Feulgen cytophotometry revealed that mean value of DNA content for each genome was D= 10.95, B = 13.88, F = 14.31, E = 18.24, A = 18.66, and C = 20.30, and that there is a close relationship of genomic chromosome size and DNA content. Evidence suggests that the five genomes with large chromosomes arose from a D genome-like progenetor by large scale, saltatory replication of repetitive DNA distributed uniformly through the ancestral genome. Corresponding adjustment in recombination units did not accompany the two-fold divergence in DNA value of the two homoeologous A and D genomes in the allotetraploid species.
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Edwards, G.A., Endrizzi, J.E. & Stein, R. Genome DNA content and chromosome organization in Gossypium . Chromosoma 47, 309–326 (1974). https://doi.org/10.1007/BF00328864
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DOI: https://doi.org/10.1007/BF00328864