Linked Life Data

19603060

Source:http://linkedlifedata.com/resource/pubmed/id/19603060

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2009-11-20
pubmed:abstractText
Changes in chromosome number have a critical role in the evolution and formation of plant species. Triploids, which carry three complete sets of chromosomes, in particular produce offspring with different chromosome numbers, including diploid and tetraploid progeny, as well as a swarm of aneuploid progeny, which carry incomplete chromosome sets. In this study, we investigated the mechanisms shaping these swarms at the population level through a detailed characterization of the progeny of triploid Arabidopsis thaliana. We report that triploid meiosis predominately produced aneuploid gametes, most of which were viable. We performed reciprocal crosses between triploid and either diploid or tetraploid plants and karyotyped all surviving individuals. This allowed us to dissect the parent-of-origin (cross-direction) effects and also the effect of the dosage of the crossing partner on the inheritance of each chromosome type. Overall, our data indicate that the chromosomal composition of the swarms produced by the triploid A. thaliana were strongly influenced by selection acting against specific gamete combinations, but not necessarily associated with aneuploidy. Finally, each of the five chromosome types responded differently to this selection, suggesting the presence of dosage-sensitive factor(s) critical for viability and encoded on different chromosomes.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1365-2540
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
103
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
458-68
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Dosage and parent-of-origin effects shaping aneuploid swarms in A. thaliana.
pubmed:affiliation
Department of Biology, University of Washington, Seattle, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural