Characterization of the Ghd8 Flowering Time Gene in a Mini-Core Collection of Miscanthus sinensis

 

CABBI Theme: Feedstock Production

Keywords Genomics

 

Citation

Guo, Z. Xu, M., Nagano, H., Clark, L.V., Sacks, E.J., Yamada, T. Feb 19, 2021. “Characterization of the Ghd8 Flowering Time Gene in a Mini-Core Collection of Miscanthus sinensis.” Genes. DOI: 10.3390/genes12020288.

 

Expression of MsiGhd8 at Zeitgeber time 9 for 12 Misanthus sinensis accessions under long days (15 hours). Grey and black represent MsiGhd8A and MsiGhd8B, respectively.

Overview

The optimal flowering time for bioenergy crop miscanthus is essential for environmental adaptability and biomass accumulation. However, little is known about how genes controlling flowering in other grasses contribute to flowering regulation in miscanthus. Here, we report on the sequence characterization and gene expression of Miscanthus sinensisGhd8, a transcription factor encoding a HAP3/NF-YB DNA-binding domain, which has been identified as a major quantitative trait locus in rice, with pleiotropic effects on grain yield, heading date and plant height. In M. sinensis, we identified two homoeologous loci, MsiGhd8A located on chromosome 13 and MsiGhd8B on chromosome 7, with one on each of this paleo-allotetraploid species’ subgenomes. A total of 46 alleles and 28 predicted protein sequence types were identified in 12 wild-collected accessions. Several variants of MsiGhd8 showed a geographic and latitudinal distribution. Quantitative real-time PCR revealed that MsiGhd8 expressed under both long days and short days, and MsiGhd8B showed a significantly higher expression than MsiGhd8A. The comparison between flowering time and gene expression indicated that MsiGhd8B affected flowering time in response to day length for some accessions. This study provides insight into the conserved function of Ghd8 in the Poaceae, and is an important initial step in elucidating the flowering regulatory network of Miscanthus.

 

Data

Download (6 KB) includes:

  • Polymorphic Sites
  • Protein Types
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