Format

Send to

Choose Destination
Plant Physiol. 2017 Jan;173(1):269-279. doi: 10.1104/pp.16.01178. Epub 2016 Oct 14.

Genetic Architecture of Flowering-Time Variation in Brachypodium distachyon.

Woods DP1,2,3,4,5, Bednarek R1,2,3,4,5, Bouché F1,2,3,4,5, Gordon SP1,2,3,4,5, Vogel JP1,2,3,4,5, Garvin DF1,2,3,4,5, Amasino RM6,7,8,9,10.

Author information

1
Laboratory of Genetics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (D.P.W., R.M.A.).
2
United States Department of Energy Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin 53706 (D.P.W., R.M.A.).
3
Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706 (D.P.W., R.B., F.B., R.M.A.).
4
United States Department of Energy Joint Genome Institute, Walnut Creek, California 94598 (S.P.G., J.P.V.); and.
5
USDA-ARS Plant Science Research Unit, University of Minnesota, Department of Agronomy and Plant Genetics, St. Paul, Minnesota 55108 (D.F.G.).
6
Laboratory of Genetics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (D.P.W., R.M.A.); amasino@biochem.wisc.edu.
7
United States Department of Energy Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin 53706 (D.P.W., R.M.A.); amasino@biochem.wisc.edu.
8
Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706 (D.P.W., R.B., F.B., R.M.A.); amasino@biochem.wisc.edu.
9
United States Department of Energy Joint Genome Institute, Walnut Creek, California 94598 (S.P.G., J.P.V.); and amasino@biochem.wisc.edu.
10
USDA-ARS Plant Science Research Unit, University of Minnesota, Department of Agronomy and Plant Genetics, St. Paul, Minnesota 55108 (D.F.G.) amasino@biochem.wisc.edu.

Abstract

The transition to reproductive development is a crucial step in the plant life cycle, and the timing of this transition is an important factor in crop yields. Here, we report new insights into the genetic control of natural variation in flowering time in Brachypodium distachyon, a nondomesticated pooid grass closely related to cereals such as wheat (Triticum spp.) and barley (Hordeum vulgare L.). A recombinant inbred line population derived from a cross between the rapid-flowering accession Bd21 and the delayed-flowering accession Bd1-1 were grown in a variety of environmental conditions to enable exploration of the genetic architecture of flowering time. A genotyping-by-sequencing approach was used to develop SNP markers for genetic map construction, and quantitative trait loci (QTLs) that control differences in flowering time were identified. Many of the flowering-time QTLs are detected across a range of photoperiod and vernalization conditions, suggesting that the genetic control of flowering within this population is robust. The two major QTLs identified in undomesticated B. distachyon colocalize with VERNALIZATION1/PHYTOCHROME C and VERNALIZATION2, loci identified as flowering regulators in the domesticated crops wheat and barley. This suggests that variation in flowering time is controlled in part by a set of genes broadly conserved within pooid grasses.

PMID:
27742753
PMCID:
PMC5210718
DOI:
10.1104/pp.16.01178
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center