Studies in Plant Breeding in the Tropics. 



BY 



R. H. LOCK. 



(Fellow and late Frank Smart Student of Gonville and Cuius College. 



Cambridge.) 



III.— EXPERIMENTS WITH MAIZE. 



1. 

 CONTENTS. 



Introduction. 



Account of Correns' experiments on " Xenia." 

 Cultivation of Maize in Ceylon. 

 Methods. 



The strains used in the experiments. 

 The characters considered. 

 I. — Crosses between definite races : — 

 A. —Single pairs of characters : 



(1) Starch-Sugar 



(2) Yellow-White. 



(3) Blue- White. 



(4) Indentation of grains. 



(5) Height of plants. 



B. — Combinations of characters. 



II. Analysis of the inheritance of colour characters in a 



mongrel strain: — 

 A. — Single pairs of characters : 



(1) Yellow- White. 



(2) Blue- White. 



(3) Red- White (pericarp). 

 B. — Combinations of characters. 



Summary. 



Appendix 1. — Crosses with Kidney Beans. 



2. — Crosses with Canavalia ensiformis. 



3. — Supplementary account of the progress of Men- 



delian studies. 

 4. — Supplementary List of Literature. 

 N OTE _This paper was completed in October, 1905, and the 

 author has had no opportunity of revising it in the light of the 

 numerous important results which have since appeared. 

 [Annalsofthe Royal Botanic Gardens, Peradeniya,Vol. III., Part II., November^ 90G.I 



9(8)06 W 



