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Method used for the development of the “Skunk No. 1”: the first NLD/BLD hybrid bred in the early 1970s. To obtain this variety, plants of the F2 progeny were chosen to carry out nine repeated inbreeding cycles aimed at increasing their homozygosity, then ten female and ten male plants were selected and vegetatively propagated to be used as parental lines in all possible pairwise cross-combinations.
