Gy 29, 1970

Dr. Oliver E. Neleon, Jr.
Department of Genetlos
Genetioe Building
University of Wleoon8in
Madison, Wisconr~ln 53706

Dear Ollver~

   The ear you eent to me several daya ago is being returned
to you air mall, first olaas.  1 appreoiated the opportu@ity
to view this ear.   it aleo ehowe restrioted distributions of
kernel8 having only white atarah in them, although less
rigidly than on the previously viewed ear.   I strongly 5uspeot,
nevertheleaa,  that the restriction is real.   It appears to be
another exa:iiple of restriction8 of kernel phenotype distribution5
to speuial part8 of an ear.   ~8 I mentioned to you on the phone,
I have noted three instanaes of reetriotion in my materials.
One of these inat;ztncee is illustrated (Figure 6) and mentioned
In my 1968 paper in Supplement 1 of Development:1 Biology.
A rtsprint of this paper was sent to you.   I -ted through my
stocks for a second ease to show youb  X could find ears from
only one plant.   Zars from all other plants had been ahelled.
This plant, 8087B, produced four fertile ears, two on the main
atalk and one eaoh on two tillers.   Two view5 of each of these
four ear8 appear In the enclohjed Pol`roid photographs.   The
white kernels reueived a deficient chromosome 9 from the ear
parent and the dark kernel8 received the homologous normal
ohr~mosome 9.

   Plant 8087B had one normal chromosome 9 with the marker8
9 Z&&s and a defiuient ohromoeome 9 lacking all of the
distal part of the ehort arm including the 2 10~~5 but not the
       This deficient crhromosome oarried the marker8 a,
         An active u w:is present in plant 8087B.   The
pollen pnrent in eaoh cro5s wars homozygoue for a, a, a, and s
and it had no active S
       M .   Pollination8 of all four ear8 were
made on August 12 (8   upper right corner on each tag).
Several colored kernele'on the ear of tiller-2 appear to h::ve
colorless eeotors,  These are bronze seotore produced by somatio
loss of Ba delivered by the pollen pRrento   Jithin the colorless
class,, a?ew kernels with a & phenot,,8pe may be noted as well as
sectors exhibiting the Wx phenotype in other kernela.

   prom the photogra&he it is eviaent that restriction of
phenotype dfstributiona has occurred, even though the reetrictions
are not completely rigid.   bu'ith this deficienoy, I h;:ive noted
the exhibited reetrictions many timee,


   I hope by now that your campus is a bit more quiet.    A
long talk on the phone yesterday with harry Stinaon at
Cornell told me of the situation there.  Morale y;lzrrn;;y
of the professor8 is bad and ie getting wor5e,
are headiq toward5 the Latin Ameriuan university system.
ff 50, it is the end of oreative aativitiee at such institutions.
My conuern is personal as well a5 general,   1 dont know where to
go*

   PIany thank8 for sending me the eara and the kernels.
I enjoyed looking at them.

Sincerely,

b@h
Barbara PIcClintook