39 



oogonia. It is hoped that some plan can be worked out later by 

 which anyone desiring strains of Neurospora tetrasperma for 

 class use can readily obtain them from some central culture 

 laboratory. 



Albino strains of both sexes of Neurospora sitophila have 

 been developed. These strains can be mated together to produce 

 albino races which breed true for this character. When crossed 

 with typical orange-colored monilioid races half of the progeny 

 will be albinistic and half typical thus providing a good example 

 of mendelian segregation. Furthermore, fertile interspecific 

 hybrids between the eight-spored Neurospora sitophila and the 

 four-spored N. tetrasperma can be produced in culture, so that 

 we have at hand very desirable illustrative material for classes 

 in genetics. 



New York Botanical Garden 



Description of Plate 2 



Asci from an ascocarpe of Neurospora sitophila. Each ascus contains four 

 spores of each sex. X300. 



