Differences in recombination frequency during male and female gametogenesis in rye, <em>Secale cereale</em> L.

The article presents information on differences in recombination frequency during male and female gametogenesis in rye, Secale cereale L. With the advent of genetic mapping, differences in recombination frequencies during male and female meiosis have become apparent. A number of considerations lead to the conclusion that there is little reason why the recombination frequencies should be same in both sexes. An analysis of the timing of micro- and macrosporogenesis in rye has shown that, within a floret, both the onset of meiosis and gametophyte maturity are synchronous. The critical phases of meiosis where recombination occurs are not synchronous, with the succession being noticeably slower in the female.