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N. T. Studies of Heredity in Plants, D. Analysis of Heredity 

 (Cornell) in Plants in Terms of the Biochemistry and Physiology of Gene 

 Action . To further understand ways in which genes govern 

 metabolism of organisms and to clarify relationships between 

 genetics and adaptation. 

 PI. Brdg. 117-D 



N. C. The Relation of Dioecious Sexual Reproduction to the 



Natural Occurrence of Polyploidy . Analyze effect of dioecious 

 reproduction on establishment of stable polyploid races in 

 plants and evaluate its influence on occurrence of polyploidy 

 in plants and animals: characterize chromosomes, genetic 

 recombination, and mechanism of sex inheritance in a dioecious, 

 diploid plant with closely related polyploid forms; learn 

 effect of chromosome doubling on this genetic system and if 

 chromosomal intraspecific races occur in geographical range of 

 species; compare cytogenetics of this dioecious diploid with 

 related polyploid species; correlate mechanism of sex 

 determination and genetic systems in these species with general 

 theories of sex determination and their relation to evolution 

 of polyploid forms. 

 Genet. 123 



Pa. An Analysis of the Correlations Between Polygene 



Combinations and the Resulting Expressions of Quantitative 

 Characters . To determine (1) effects of diverse modes of 

 breeding selection on gene systems controlling single and 

 correlated quantitative characters; and (2) relationship 

 between derived gene combinations and expressions of the 

 characters they control. 

 Bot., PI. Path. 1249 A 



