Broccoli inbreds were planted in isolation at the Vegetable and Lewis Brown Farms for hybrid seed production. To get early seed production, transplants were used. Because ofYield Trial:
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the hot summer, initial seed set was unproductive, and we had to wait for a fall set of seed. The table below shows amounts of seed obtained from the isolation plots. The AN-series are cytoplasmic male sterile lines obtained from Cornell University, and are discussed below. In addition to reduced seed set from heat, several crosses failed because inbreds carried the same incompatibility allele. Two crosses (S 401 X S 240-5-8 and S 411 X S
240-5-20) set sufficient quantities for small scale on farm tests. This seed does need to be
tested to be sure that neither of the inbreds was self-fertile. The results also point out the need to diversify the OSU germplasm to increase S allele diversity.