Heritable heading time variation in wheat lines with the same number of Ppd-B1 gene copies

0478866 - ÚEB 2018 RIV US eng J - Journal Article
Ivaničová, Zuzana - Valárik, Miroslav - Pánková, K. - Trávníčková, M. - Doležel, Jaroslav - Šafář, Jan - Milec, Zbyněk
Heritable heading time variation in wheat lines with the same number of Ppd-B1 gene copies.
PLoS ONE. Roč. 12, č. 8 (2017), č. článku e0183745. ISSN 1932-6203. E-ISSN 1932-6203
R&D Projects: GA MŠMT(CZ) LO1204; GA ČR GBP501/12/G090
Institutional support: RVO:61389030
Keywords : triticum-aestivum l. * dna methylation * copy number * flowering time * human genome * se gene * vernalization * earliness * barley * region
OECD category: Plant sciences, botany
Impact factor: 2.766, year: 2017

The ability of plants to identify an optimal flowering time is critical for ensuring the production of viable seeds. The main environmental factors that influence the flowering time include the ambient temperature and day length. In wheat, the ability to assess the day length is controlled by photoperiod (Ppd) genes. Due to its allohexaploid nature, bread wheat carries the following three Ppd-1 genes: Ppd-A1, Ppd-B1 and Ppd-D1. While photoperiod (in) sensitivity controlled by Ppd-A1 and Ppd-D1 is mainly determined by sequence changes in the promoter region, the impact of the Ppd-B1 alleles on the heading time has been linked to changes in the copy numbers (and possibly their methylation status) and sequence changes in the promoter region. Here, we report that plants with the same number of Ppd-B1 copies may have different heading times. Differences were observed among F-7 lines derived from crossing two spring hexaploid wheat varieties. Several lines carrying three copies of Ppd-B1 headed 16 days later than other plants in the population with the same number of gene copies. This effect was associated with changes in the gene expression level and methylation of the Ppd-B1 gene.
Permanent Link: http://hdl.handle.net/11104/0274908