Abstract
Earlier observations on synaptonemal complex (SC) formation inAllium are supplemented by data from diploidA. sphaerocephalon, pentaploidA. oleraceum and allotetraploidA. senescens. Accumulating information about structures like lateral element thickenings and -doublings allows to draw conclusions about their nature. The occurrence of discrete intercalary and terminal homologous associations prior to synapsis is confirmed for a range ofAllium species and it is argued that they are a general phenomenon. Several hypotheses on homologous recognition and/or attraction are discussed in the light of the observations on homologous alignment inAllium.
Published Version
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