Onion Chromosomes

[Geeta Bharathan]

On Wed, 21 Mar 2001, michael kahn wrote:
> In article <1.5.4.32.20010317024720.006a89a8 at thuban.ac.hmc.edu>, 
> purves at THUBAN.AC.HMC.EDU (Bill Purves) wrote:
> > At 05:17 PM 3/16/01 +0000, John E. Silvius wrote:
> > >Question of the day:   Can anyone report the haploid (n) number of
> > >chromosomes in Allium?    I read the interesting fact that Allium cepa
> > >has 4.4 billion N-base pairs but couldn't locate reference to
> > >chromosome number.
> 
> Check out http://www.kean.edu/~breid/chrom2st.htm, which has numbers and 
> references for many different plants and animals.  Onion, shallots and 
> chives are all listed as 2n = 16,  ramsons (wild garlic, Allium ursinum) 
> as 2n = 14.

Also check http://www.rbgkew.org.uk/cval/database1.html, which has
information on both chromosome numbers and C-values in pg per nucleus. 

-Geeta Bharathan