TaELF3-1DL, a homolog of ELF3, is associated with heading date in bread wheat

Abstract

Early flowering 3 (ELF3) is a regulator to modulate photoperiod flowering in Arabidopsis. The homologs of ELF3 in rice and barley also have been identified essential for regulation of flowering time. In the current study, TaELF3 genes, homologs of ELF3 in bread wheat (Triticum aestivum L.), were cloned by a comparative genomics approach and located on homologous group 1 chromosomes, designated as TaELF3-1AL, TaELF3-1BL, and TaELF3-1DL, respectively. A sequence-tagged site (STS) marker was developed based on sequence polymorphism at the TaELF3-1DL locus. A quantitative trait locus (QTL) for heading date (HD) co-segregating with TaELF3-1DL explained 7.7–20.6% of the phenotypic variance in a RIL mapping population derived from the Gaocheng 8901/Zhoumai 16 cross genotyped using the wheat 90K iSelect assay. The late HD allele of TaELF3-1DL was prevalently selected in China’s specific wheat-growing regions and other countries. This study produces novel information in better understanding HD and provides a reliable functional marker for molecular marker-assisted selection in wheat breeding.