III. SEED STOCKS PROPAGATED AND RECEIVED

This past summer Mr. James E. Wright, Jr. propagated approximately 115 cultures. Most of these were planted to renew viability of old stocks, to incorporate genes into new linkage testers and to purify stocks that had been outerossed in order to increase vigor. The work of crossing weak stocks to vigorous inbred lines was continued.

A complete inventory of material on hand was presented in News Letter No. 22. Inasmuch as relatively few stocks have been added to the Co�p. since that letter, no additional extensive list is given in this issue. Many of the genes have been incorporated into new combinations with other genes, thus increasing the variety of gene combinations available.

The Co�p. has received the following new gene cultures during the past year:

bl3 - blotched leaf	H. W. Simmonds
	Imperial College of Tropical Agriculture
	Trinidad, B.W.I.
de7 - defective seed	R. A. Brink
	Department of Genetics
	University of Wisconsin
	Madison 6, Wisconsin
bm4 ‑ brown midrib	C. R. Burnham
	Div. of Agronomy & Plant Genetics
	University of Minnesota
	University Farm
	St. Paul 1, Minnesota
BB - pseudonormal	H. C. Eyster
Bb - light green	Charles F. Kettering Foundation
bb1 - light green; grows into albino	Yellow Springs, Ohio
bb2 - Similar to bb1, except white color is chalky white
Yellow seedling Chromosome 6.
Pigmy and Albino Chromosome 6.

The following communication was received from Dr. William L. Brown, Pioneer Hi‑Bred Corn Company, Johnston, Iowa that is of special interest:

"Last summer I grew for study approximately 150 strains of North American Indian corn representing 35 tribes distributed largely in the northern Great Plains and the Southwest. I was able to increase seed of most of these, small quantities of which have been placed in cold storage. It is now almost impossible to obtain some of these from tribal remnants and, since there may be other people interested in working with them, it may be worthwhile to mention that they are available in small quantities. These are, for the most part, those varieties that Longley worked with and reported on in 1938."

Julian P. Craigmiles