Or 
~s 
10. 
11. 
LITERATURE CITED 
. Anderson, E. and W. L. Brown, 1952. Origin of Corn Belt maize 
and its genetic significance. Jn Heterosis: 124-148. Iowa State 
College Press. 
. Arnason, T. J., 1936. Cytogenetics of hybrids between Zea mays 
and Euchlaena mexicana. Genetics 21: 40-60. 
Beadle, G. W., 1932. Studies of Euchlaena and its hybrids with 
Zea. |. Chromosome behavior in Euchlaena mexicana and its hy- 
brids with Zea mays. Zeitschr. Ind. Abstamm. Vererb. 62: 291- 
304. 
——, 1932. The relation of crossing over to chromosome associa- 
tion in Zea-Euchlaena hybrids. Genetics 17: 481-501. 
. Brown, W. L., 1949. Numbers and distribution of chromosome 
knobs in United States maize. Genetics 34: 524-536. 
and E. Anderson, 1948. Southern dent corns. Ann. Mis- 
souri Bot. Gard. 35: 255-274. 
. Cervantes R., J., A. Rodriguez V. and J.S. Niederhauser, 1958. 
Resistencia al virus causante del achaparramiento del maiz. Fol- 
leto Tecnico 29: 1-18. Secretaria de Agricultura y Ganaderia, 
Mexico. 
. Collins, G. N., 1921. Teosinte in Mexico. Jour. Hered. 12: 
339-350. 
. Cutler, H. C., 1952. A preliminary survey of plant remains of 
Tularosa Cave. Fieldiana: Anthropology (Chicago Nat. Hist. 
Mus.) 40: 461-479. 
——- and E. Anderson, 1941. A preliminary survey of the genus 
Tripsacum. Ann. Missouri Bot. Gard. 28: 249-269. 
Emerson, R. A. and G. W. Beadle, 1932. Studies of Kuchlaena 
and its hybrids with Zea. II. Crossing over between the chromo- 
somes of Euchlaena and those of Zea. Zeitschr. Ind. Abstamm. 
Vererb. 62: 305-315. 
[ 407 ] 
