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    • Rooney, William Lloyd (1987)
      The tetraploid cultivated cotton Gossypium hirsutum (2n=4x=52) normally will not form viable F₁ hybrids with G. davidsonii or any tetraploid homozygous for Le₂ᵈᵃᵛ. Many or most G. hirsutum plants are homozygous for alleles ...