Nondisjunction in Favor of a Chromosome: The Mechanism of Rye B Chromosome Drive during Pollen Mitosis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F12%3A00384793" target="_blank" >RIV/60077344:_____/12:00384793 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1105/tpc.112.105270" target="_blank" >http://dx.doi.org/10.1105/tpc.112.105270</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1105/tpc.112.105270" target="_blank" >10.1105/tpc.112.105270</a>

Result language

angličtina

Original language name

Nondisjunction in Favor of a Chromosome: The Mechanism of Rye B Chromosome Drive during Pollen Mitosis

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EB - Genetics and molecular biology

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plant Cell

ISSN

1040-4651

e-ISSN

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Volume of the periodical

24

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

4124-4134

UT code for WoS article

000312378300020

EID of the result in the Scopus database

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