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Nondisjunction in Favor of a Chromosome: The Mechanism of Rye B Chromosome Drive during Pollen Mitosis
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SYSNO ASEP 0384793 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nondisjunction in Favor of a Chromosome: The Mechanism of Rye B Chromosome Drive during Pollen Mitosis Author(s) Banaei-Moghaddam, A.M. (DE)
Schubert, V. (DE)
Kumke, K. (DE)
Weiβ, O. (DE)
Klemme, S. (DE)
Nagaki, K. (JP)
Macas, Jiří (BC-A) RID, ORCID, SAI
González-Sánchez, M. (ES)
Heredia, V. (ES)
Gómez-Revilla, D. (ES)
González-García, M. (ES)
Vega, J.M. (ES)
Puertas, M.J. (ES)
Houben, A. (DE)Number of authors 14 Source Title Plant Cell. - : Oxford University Press - ISSN 1040-4651
Roč. 24, č. 10 (2012), s. 4124-4134Number of pages 11 s. Publication form Print - P Language eng - English Country US - United States Keywords chromosomes ; centromere ; repeats Subject RIV EB - Genetics ; Molecular Biology CEZ AV0Z50510513 - UMBR-M, BC-A (2005-2011) UT WOS 000312378300020 DOI 10.1105/tpc.112.105270 Annotation B chromosomes (Bs) are supernumerary components of the genome and do not confer any advantages on the organisms that harbor them. The maintenance of Bs in natural populations is possible by their transmission at higher than Mendelian frequencies. Although drive is the key for understanding B chromosomes, the mechanism is largely unknown. We provide direct insights into the cellular mechanism of B chromosome drive in the male gametophyte of rye (Secale cereale). We found that nondisjunction of Bs is accompanied by centromere activity and is likely caused by extended cohesion of the B sister chromatids. The B centromere originated from an A centromere, which accumulated B-specific repeats and rearrangements. Because of unequal spindle formation at the first pollen mitosis, nondisjoined B chromatids preferentially become located toward the generative pole. The failure to resolve pericentromeric cohesion is under the control of the B-specific nondisjunction control region. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2013
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