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The European Arabidopsis Stock Centre

NASC Stock Detail Page


Name: Gemini Pollen1 (gem1)

ABRC stock number: CS888

Description: Embryo

Donation Date: 2000-07-01

Donated by:  University of Leicester David Twell

Donor Number: gem1-1

Stock type: individual line

Material type: seed

Status Price (£)
Line requires bulking £10.00

Germplasm Info

Seed type: Mutant

Mutagen: ethylmethane sulfonate

Background: Nossen

Pedigree: Three times backcrossed to witl-type Nossen

Segregation: Yes

Associated Polymorphisms

When available, select a locus to display it at the AIP or view the EMBL record at the EBI.

Gene: Allele: Locus: AGI code:
  • gem1-1
  • Gem1
EMBL accession:


gem1 affects post-meiotic cytokinesis of the microspore at pollen mitosis I, causing altered cell division asymmetry and cell fate. Equal daughter cells resulting from symmetric division at pollen mitosis I both show vegetative cell fate. This produces mature pollen with two 'vegetative' cells and no generative or sperm cells. About 20% of pollen from heterozygote plants show aberrant division phenotypes.


Park, S.K., Howden, R. & Twell, D. 1998. The Arabidopsis thaliana gametophytic mutation gemini pollen 1 disrupts microspore polarity, division asymmetry and pollen cell fate. Development 125(19): 3789-3799.PubMed ID: 9729487.