1004 
Botany. — “Some correlationphenomena in hybrids’. By Miss 
T. Tammes. (Communicated by Prof. Morr). 
(Communicated in the meeting of November 30, 1912). 
In recent years there have been observed also in hybridisation 
phenomena which show a certain relation between different 
characters of a plant. Already in 1900 CorrENs') pointed out 
this relation and called it “Faktorenkoppelung”. Some years 
later BaTrson’*) put forward a theory to explain the phenomena 
observed. According to Barrson, in the formation of gametes in the 
case of a plant heterozygous for more than one factor, the various 
possible combinations of factors or genes do not arise in equal 
numbers. There may be two reasons for this. In the first place some 
factors may show a certain tendency to remain connected whilst 
they are however not so completely coupled as to preclude occasional 
separation. In the seeond place there can be between different factors 
a tendency to repulsion. 
Some examples of such “gametic-coupling’” and “repulsion” or 
“spurious allelomorphism”, as Batrson calls these phenomena, are 
already known. I too made observations in the course of my in- 
vestigation on hybridisation that could best be explained by such a 
genetie correlation. Whilst however the cases known up to the 
present relate to characters whose presence or absence in the plants 
investigated is easily determined, this is not so in my inquiry. I 
have studied characters whose fluctuating variability is very marked, 
while moreover the distinction between the parental forms for one 
and the same character already amounts to several genes. The 
characters are, as LANG*) expresses it, polymeric. On this account 
the phenomena become so complicated that a complete analysis is 
impossible or only possible by most laborious investigation. I have 
so far therefore taken a shorter course and shall only show in this 
preliminary paper that the phenomena point to a correlation not 
only between two but indeed between a greater number of characters. 
My observations have been made on the cross already *) earlier 
described, between Linwmn ungustifolium Huds. and a variety from 
1) G. Correns, Ueber Levkoyenbastarde. Bot. Centr. Bd. 84, 1900, p. 11 of the 
reprint. 
2) W. Baresoy, Mendel’s Principles of Heredity. 1909, p. 148. 
3) Aknotp Lane, Fortgesetzte Vererbungsstudien. Zei'schr. f. indukt. Abst. und 
Vererbungslehre, Bd. V, 1911, p. 113. 
4) Das Verhalten fluktuierend variierender: Merkmale-bei der Bastardierung. Rec. 
d. Trav. bot. Néerl. Vol. 8, 1911. p. 201. 
