Letter from Barbara McClintock to Charles R. Burnham
Part of a series of letters with Burnham on McClintock's research on c-shwx that would result in an article in the "Proceedings
of the National Academy of Sciences" later in 1931. Contains several diagrams, but little new data.
Item is handwritten. Item is a photocopy.
Number of Image Pages:
2 (117,969 Bytes)
1931-04-11 (April 11, 1931)
Burnham, Charles R.
Original Repository: University of Minnesota, University Archives. Charles Burnham Papers
Reproduced with permission of the University of Minnesota, University Archives. Charles Burnham Papers
Medical Subject Headings (MeSH):
The Order of the Genes C, Sh, and Wx in Zea Mays with Reference to a Cytologically Known Point in the Chromosome (1931)
Letter from Barbara McClintock to Charles R. Burnham (March 1, 1931)
Letter from Barbara McClintock to Charles R. Burnham (March 12, 1931)
Letter from Barbara McClintock to Charles R. Burnham (May 12, 1931)
Letter from Barbara McClintock to Charles R. Burnham (June 11, 1931)
Box Number: 3
Folder Number: 4
April 11, 1931
Many thanks for your letter. I was anxious to hear from you. This is just a hurried note. I have some dope on the low steriles
which I must send you but I can not do it this evening. I wish to send the seeds so you can get started with their planting.
I am sorry but I have nothing on c-sh-wx chromosomes but what I sent you which was CceShShShWxWxWx.xAcrgwx. The right types
will have to be synthesized from what we have. I am sorry I haven't got what you want.
I am sending number 8 (3rd -- smallest). It represents 388F(1) [line drawn to, AshshccWxwxPrPr no large knob] plus 1; no sterile
crossed with 342(9) [line drawn to, ACRprwx] homozygous granule; ordinary normal.
I have 2n plus 1 (extra chromosome the long interchange chr.) Do you want any of this? I am enclosing some photographs of
one of these plants which was crossed to an ordinary normal, homozygous granule. The photos are from a 2n plus 1 showing a
chain and low sterility in the pollen.
[END PAGE ONE]
[BEGIN PAGE TWO]
I have numbered them. [diagram along left side of page]
If you don't understand these photos, let me know. They are from the plants which were giving off ratios for wx, sh and
c. These are proofs of fact -- that long interchange chromosome carries the c-sh-wx genes. Since knob chr. is c-sh-wx, shows
order of genes. I feel it is possible all genes are in short arm of c-sh-wx chr. More of this later.
As usual --
Morgan is here but I haven't been introduced yet. Hope to see him during the week.
Harriet is getting great evidence on x-over and knob. C sticks with knob nearly always. wx less and interchange probably less.
She will send you the facts soon I believe --