Genome diversity in wild grasses under environmental stress

Fitzgerald, Timothy L., Shapter, Frances M., McDonald, Stuart, Waters, Daniel L. E., Chivers, Ian H., Drenth, Andre, Nevo, Eviatar and Henry, Robert J. (2011) Genome diversity in wild grasses under environmental stress. Proceedings of the National Academy of Sciences of the United States of America, 108 52: 21140-21145.


Author Fitzgerald, Timothy L.
Shapter, Frances M.
McDonald, Stuart
Waters, Daniel L. E.
Chivers, Ian H.
Drenth, Andre
Nevo, Eviatar
Henry, Robert J.
Title Genome diversity in wild grasses under environmental stress
Journal name Proceedings of the National Academy of Sciences of the United States of America   Check publisher's open access policy
ISSN 0027-8424
1091-6490
Publication date 2011-12-27
Sub-type Article (original research)
DOI 10.1073/pnas.1115203108
Volume 108
Issue 52
Start page 21140
End page 21145
Total pages 6
Place of publication Washington, DC, U.S.A.
Publisher National Academy of Sciences
Collection year 2012
Language eng
Formatted abstract Patterns of diversity distribution in the Isa defense locus in wild-barley populations suggest adaptive selection at this locus. The extent to which environmental selection may act at additional nuclear-encoded defense loci and within the whole chloroplast genome has now been examined by analyses in two grass species. Analysis of genetic diversity in wild barley (Hordeum spontaneum) defense genes revealed much greater variation in biotic stress-related genes than abiotic stress-related genes. Genetic diversity at the Isa defense locus in wild populations of weeping ricegrass [Microlaena stipoides (Labill.) R. Br.], a very distant wild-rice relative, was more diverse in samples from relatively hotter and drier environments, a phenomenon that reflects observations in wild barley populations. Whole-chloroplast genome sequences of bulked weeping ricegrass individuals sourced from contrasting environments showed higher levels of diversity in the drier environment in both coding and noncoding portions of the genome. Increased genetic diversity may be important in allowing plant populations to adapt to greater environmental variation in warmer and drier climatic conditions.
Keyword Adaptive variation
Genomics
Molecular evolution
Disease resistance
Abiotic stress resistance
Betaine Aldehyde Dehydrogenase
Alpha-Amylase/subtilisin Inhibitor
Amylase-Subtilisin Inhibitor
Rice Oryza-Sativa
Emmer Wheat
Molecular Evolution
Resistance Gene
Barley
Populations
Israel
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Queensland Alliance for Agriculture and Food Innovation
 
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