2l6 



THE BEHAVIOUR OF POLYPLOIDS 



entirely sterile. In this they resemble polyploid species that are 



interchange heterozygotes, and must depend entirely on vegetative 



propagation for their continued existence. 



With these species, polyploids having the behaviour of simple 



structural heterozygotes may conveniently be considered, for the 



reasons given earlier. 



Table 32 



Autopolyploid Species and Mutants (cf. Table 37) 

 (basic numbers in brackets) 



A. Triploids {cf. Table 19 (6) ) 



I. Wild Species [i.e., clonal species asexually reproduced) : — 



Takenaka and Nagamatsu, 1930 

 [v. Table 15). 



D., unpublished. 



D., unpublished. 



Sinoto, 1929. 



Jaretzky, 1930. 



Nishiyama, 1928. 



Takenaka, 1930. 



Matsuura, 1935. 

 . D,, 1936 d. 



Karasawa, 1933. 

 . Nagao, 1933. 



Levan, 1933 <^- 



Upcott (unpublished). 

 . Vandel, 1927 {v. Ch. XI). 



I 



Lilium tigrinum (12) 



Tulipa prcscox {12) 

 Tulipa saxatilis (12) 

 Hydrilla verticillata (8) 

 Alnus cordata, etc. (7) . 

 Lycoris radiata (11) 

 L. squamigera (9) 

 Fritillaria camtschatcensis (12] 

 Fritillaria spp. (12 and 13) . 

 Crocus sativus (8) 

 Narcissus spp. 

 Allium carinatum (8) . 

 Tulipa lanata (12) 

 Trichoniscus provisorius (8) . 



2. Mutants of Species (occasional progeny from unreduced gametes) : — 



3^, 



Bridges, 192 1 a ; Metz, 1926. 

 Navashin, 1926. 



Ono, 1928, 1930, 1935 ; Ono and 

 Shimotomai, 1928. 



Sorokin, 1927 a. 



Randolph and McClintock, 1926 ; 



McClintock, 1929 (7-10"'). 

 Ruttle, 1928 ; Avery, 1929 



(monosomic diploid selfed). 

 Wettstein, 1928. 

 Allen, 1935, a and b. 

 Morinaga and Fukushima, 1933. 

 Bostian, 1936. 

 Kawaguchi, 1933. 

 Upcott and La Cour, 1936. 



3. Cultivated Forms (vegetatively propagated) : — 

 Hyacinthus orientalis (8) . . . De Mol, 1923 ; Belling, 1925, 



1927 ; D., 1926, 1929 (highly 



fertile) . 

 Tulipa Gesneriana vars. (12) . . De Mol, 1929 ; Newton and D., 



1929 ; Upcott and La Cour, 



1936. 



Drosophila melanogaster (4) 



Crepis capillar is (3) . 



Rumex Acetosa (8) (discovered through 



examination of intersexes). 

 Ranunculus acris (6) (probably 



gynodimorphic) 

 Zea Mays (10) . 



Nicotiana alata (9) . . . 



Funaria hygrometrica (7) 

 Sphcsrocarpos Donnellii (8) . 

 Oryza saliva (10) 

 Habrobracon juglandis {10) 

 Bombyx mori (29) 

 Tulipa Clusiana (12) . 



