236 



RESEARCHES ON FUNGI 



diploid, and that the pairs of conjugate nuclei in that mycelium 



and in the fruit-body produced by it had the constitution 



{Ab)+{aB). 



Table III. 



Goprinus lagopus. All Possible Pairings of Nine Monosporous Mycelia 

 derived from Nine Spores of a Fruit-body produced on a Large Haploid 

 Mycelium {Ab) after this Mycelium had been diploidised by a Diploid 

 Inoculum {Ab)-j-{aB). 



AB 



a 



b 



Ab 



a 



B 



1 5 



TT 



6 9 2 7 



/ISfaP 



a 



b 



Ab 



a 



B 



In order to find out whether or not the four groups of myceUa 

 (AB), (ab), (Ab), and (aB) represented in Table III were identical 

 with the four groups of mycelia (AB), (ab), (Ab), and (aB) of the 

 strain of Goprinus lagopus from which the diploidised haploid (Ab) 

 and its diploid inoculum {Ab)-{'{aB) had been derived, the nine 

 myceUa of Table III were paired with Myceha Nos. 2, 6, 1, and 9 

 of Table I, i.e. with four testers of the parent strain having the 

 constitution (AB), (ab), (Ab), and (aB) respectively. The results 

 of the pairings are embodied in Table IV. 



From the results shown in Table IV, it is evident that the two 

 sets of combinations of sex factors (AB), (ab), {Ab), and {aB) as 

 represented in the parental or original haplonts (monosporous 

 mycelia), on the one hand, and in the fihal or new haplonts, on the 



