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GrainGenes Reference Report: GNM-38-772

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Reference	GNM-38-772
Title	Synaptic abnormalities in spread nuclei of Secale II Secale vavilovii
Journal	Genome
Year	1995
Volume	38
Pages	772-779
Author	Martinez M Romero C Cuadrado C
Abstract	Secale vavilovii PMCs have more univalents and a lower frequency of bound arms at metaphase I than other diploid Secale species The spreading technique applied at prophase I showed that the nuclei were able to complete synapsis at pachytene However, 25% of the nuclei analyzed, which had more than 90% of their total length paired, showed two abnormalities: long fold-back loops, which were located mainly on the nucleolar organizer bivalent, and pairing-partner switches, probably involving all the chromosome complement These synaptic abnormalities are unusual in diploid species and give rise to a high frequency of nonhomologous pairing regions and, therefore, could produce desynapsis, which could explain the data obtained from metaphase I The possible origin of the unusual synaptic abnormalities of S vavilovii is discussed
Keyword	asynapsis [ Show all 11 ]

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