Sequence of the supernumerary B chromosome of maize provides insight into its drive mechanism and evolution
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F21%3A00548808" target="_blank" >RIV/61389030:_____/21:00548808 - isvavai.cz</a>
Result on the web
<a href="http://doi.org/10.1073/PNAS.2104254118" target="_blank" >http://doi.org/10.1073/PNAS.2104254118</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1073/PNAS.2104254118" target="_blank" >10.1073/PNAS.2104254118</a>
Alternative languages
Result language
angličtina
Original language name
Sequence of the supernumerary B chromosome of maize provides insight into its drive mechanism and evolution
Original language description
B chromosomes are enigmatic elements in thousands of plant and animal genomes that persist in populations despite being nonessential. They circumvent the laws of Mendelian inheritance but the molecular mechanisms underlying this behavior remain unknown. Here we present the sequence, annotation, and analysis of the maize B chromosome providing insight into its drive mechanism. The sequence assembly reveals detailed locations of the elements involved with the cis and trans functions of its drive mechanism, consisting of nondisjunction at the second pollen mitosis and preferential fertilization of the egg by the B-containing sperm. We identified 758 protein-coding genes in 125.9 Mb of B chromosome sequence, of which at least 88 are expressed. Our results demonstrate that transposable elements in the B chromosome are shared with the standard A chromosome set but multiple lines of evidence fail to detect a syntenic genic region in the A chromosomes, suggesting a distant origin. The current gene content is a result of continuous transfer from the A chromosomal complement over an extended evolutionary time with subsequent degradation but with selection for maintenance of this nonvital chromosome.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10601 - Cell biology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Proceedings of the National Academy of Sciences of the United States of America
ISSN
0027-8424
e-ISSN
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Volume of the periodical
118
Issue of the periodical within the volume
23
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
e2104254118
UT code for WoS article
000684997100009
EID of the result in the Scopus database
2-s2.0-85107819366