In order to study the inheritance of poly-row-and-branched spike (PRBS) in barley, the row types of F1s, F2s, F3s of four crosses ( six-row x two-row, PRBS x two-row, PRBS x six-row and six-row x PRBS ) were investigated and analyzed. The results showed that one pair of recessive genes controls the PBRS mutant trait, which has recessive epistasis on the genes controlling two-row vs. six-row.
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