Gene Details:

• Gene ID: TraesCS2B02G405700
• Gene Symbol: GNI-B1
• Gene Name: Grain Number Increase 1
• Genome: Chinese_Spring1.0
• Species: Triticum aestivum

Functional Descriptions:

• The GNI1 gene, encoding an HD-Zip I transcription factor, was identified as responsible for increased floret fertility.
• Genetic analysis has revealed that the reduced-function allele GNI-A1 contributes to the increased number of fertile florets per spikelet. The RNAi-based knockdown of GNI1 led to an increase in the number of both fertile florets and grains in hexaploid wheat.
• The locus Grain Number Increase 1 (GNI1) is shown here to be an important contributor to floret fertility. GNI1 evolved in the Triticeae through gene duplication. The gene, which encodes a homeodomain leucine zipper class I (HD-Zip I) transcription factor, was expressed most abundantly in the most apical floret primordia and in parts of the rachilla, suggesting that it acts to inhibit rachilla growth and development.
• The RNAi-based knockdown of GNI1 led to an increase in the number of both fertile florets and grains in hexaploid wheat.

Function-related keywords:

• transcription-factor ,  growth ,  development ,  spikelet ,  grain ,  fertility ,  grain-number ,  spikelet-number ,  spikelet-development ,  grain-growth

Literature:

• Unleashing floret fertility in wheat through the mutation of a homeobox gene.   DOI:  10.1073/pnas.1815465116 ;  PMID:  30792353

Related News:

Gene Resources:

• NCBI ID: 123046159
• UniProt accessions: A0A3B6CA76

Sequences: