Sorghum Line with Increased Frequency of Polyembryony

摘要

Of nine sorghum genotypes screened for polyembryony in germinating seeds, cultivar Negritjanskoje 3366/2 (S nigricam Rukz and Snowd.) exhibited the highest frequency of polyembryony (0.12%). The proportion of plants with polyembryonic seeds in their panicles was 34 5%. In 1992, polyembryony frequency (PF) was evaluated in 18 families derived from this cultivar (the offspring of one plant was considered as a family). Seeds from 7-10 plants from each family were pooled for analysis In 6 of the 18 families studied, twin seedlings were found with a frequency of 0.11-0.31%. Two families, N-3 and N-9, had distinctly high PFs (0.31 and 0.29%), that were not significantly different from each other, but differed from the PFs of other families at P <0 0.05.