8 Brassica Crosses. 



The bulbed plants included 44 well-developed Kohl Rabi against 60 in the 

 reverse cross, and 66 slightly bulbed against 94 in the reverse cross. But amongst 

 the bulbless plants none were seen resembling the Thousand-headed Kale as in the 

 reverse cross, though there were 38 with broad leaves like a Cabbage, quite unlike 

 either parent. 



Fig. 81. 44 were almost pure Kohl Rabi with coarse foliage. 

 82. 91 like the 94 in the reverse, i.e. Thousand-headed Kale foliage and 



slight bulb. 



83. 28 were bulbless with Kohl Rabi foliage. 



84. 38 had broad Cabbage-like leaves with a bulbless elongated stem. 

 From the 9 : 3 X 3:1 Mendelian ratio, we should expect : 



From 208 plants. 

 Bulbed, Thousand-headed Kale foliage ... ... 117 



Kohl Rabi foliage 39 



Bulbless, Thousand-headed Kale foliage ... ... 39 



Kohl Rabi foliage 13 



Kohl Rabi on Drumhead Cabbage 



(PI. 10, figs. 85 & 86). 



The plants of F 1 in this cross had slight indication of the bulbing character 

 with foliage resembling that of the Cabbage. There was, however, no sign of 

 the " hearting " tendency of the Cabbage (fig. 87). 



215 plants were raised of the F 2 generation (see figs. 88, 89 & 90). Of these : 

 Fig. 88. 45 had distinct Kohl Rabi bulbs and foliage. 

 89. 154 had rather enlarged stems, as if influenced by Kohl Rabi, the 



foliage being variable and unde terminate. 

 90. Only 16 plants had leaves closely resembling those of the Cabbage. 



As regards typical Kohl Rabi plants there were 



Found (215 plants). Expected (from 216 plants). 



Kohl Rabi 45 54 



Not Kohl Rabi . 170 162 



In the reciprocal cross : 



c? ? 



Drumhead Cabbage on Kohl Rabi (see figs. 85 & 86), 



the plants of F 1 were similar to those of F 1 in the reverse cross, having Cabbage- 

 like leaves and a slight bulb (fig. 91). 



195 plants were grown of the F 2 generation (see figs. 92, 93, 94 & 95, PI. 11). 

 Of these 



Fig. 92. 46 were like Kohl Rabi (2 of these purple-leaved). 

 93. 8 had leaves like Cabbage (6 of these purple). 

 ., 94. 140 had enlarged stems with foliage of variable character. 

 , : 95. 1 resembled a Kale with a " curled " or " fringed " leaf. 



