Evidence map›Paper›PMID 41260603›Full record

ArticlePlant physiology2026

Sex chromosome pairing and multivalent associations during meiosis in diploid and polyploid Silene latifolia.

Václav Bačovský, Pavla Novotná, Dylan Phillips, Lucie Horáková, Jana Kružlicová, Jana Čížková, Bohuslav Janoušek, Radim Čegan

Abstract read
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Article in Plant physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Václav BačovskýDepartment of Plant Developmental Genetics, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 00, Czech Republic.ORCID 0000-0001-7621-8936
Pavla NovotnáDepartment of Plant Developmental Genetics, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 00, Czech Republic.ORCID 0009-0003-3708-6776
Dylan PhillipsDepartment of Life Science, Aberystwyth University, Penglais, Aberystwyth, Ceredigion SY23 3DA, UK.ORCID 0000-0002-9139-5727
Lucie HorákováDepartment of Plant Developmental Genetics, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 00, Czech Republic.ORCID 0009-0006-0656-6859
Jana KružlicováDepartment of Plant Developmental Genetics, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 00, Czech Republic.ORCID 0009-0002-6096-578X
Jana ČížkováInstitute of Experimental Botany of the Czech Academy of Sciences, Centre of Plant Structural and Functional Genomics, Slechtitelu 31, Olomouc 779 00, Czech Republic.ORCID 0000-0001-7787-1849
Bohuslav JanoušekDepartment of Plant Developmental Genetics, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 00, Czech Republic.ORCID 0000-0003-1789-8008
Radim ČeganDepartment of Plant Developmental Genetics, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 00, Czech Republic.ORCID 0000-0002-6789-6564

Funding

ERDF Programme Johannes Amos ComeniusTowArds Next GENeration Crops CZ.02.01.01/00/22_008/0004581
6 · The paper itself

Abstract

Sex chromosomes undergo various modifications that affect their synapsis during meiosis. While most of the genome achieves full synapsis by the end of pachytene, the nonrecombining regions of XY (or ZW) chromosomes often remain asynaptic and fail to form physical associations at metaphase I. Despite significant progress in animal models, the meiotic behavior dynamics of plant sex chromosomes remain largely unexplored. In this study, we employed super-resolution microscopy to analyze 3D chromosome organization and the localization of key meiotic proteins. Namely, we studied the dynamics of Asynaptic1 (ASY1), Zip1 homolog (ZYP1), and HEI10 across the leptotene to pachytene stages, and compared sex chromosome behavior in dioecious white campion (Silene latifolia) with related gynodioecious species bladder campion (Silene vulgaris). Our findings show that both species exhibit a class I crossover (CO) frequency comparable to mammals, indicating moderate COs per bivalent and their similar genetic determinants. We document variation in sex chromosome configurations, from rod bivalents in diploids to open-ring tetravalents in autopolyploids, and characterize Y chromosome behavior across XXY, XXXY, and XXYY karyotypes. These results reveal pronounced variation in pairing and synaptic patterns, even within a shared genetic background. We discuss how these patterns reflect the evolutionary trajectory of the nonrecombining region and provide the most detailed cytogenetic analysis of sex chromosome pairing in a plant with evolutionarily young sex chromosomes.

Indexed as

Chromosome PairingChromosomes, PlantDiploidyMeiosisPolyploidySex ChromosomesSilenePlant ProteinsPlant Proteins

Identifiers

PMID41260603
PMCPMC13017482

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