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SC-formation in someAllium species, and a discussion of the significance of SC-associated structures and of the mechanisms for presynaptic alignment

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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.

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Gratefully dedicated to my highly respected mentor, Prof. DrElisabeth Tschermak-Woess, on the occasion of her 70th birthday.

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Loidl, J. SC-formation in someAllium species, and a discussion of the significance of SC-associated structures and of the mechanisms for presynaptic alignment. Pl Syst Evol 158, 117–131 (1988). https://doi.org/10.1007/BF00936338

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  • DOI: https://doi.org/10.1007/BF00936338

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