Inheritance in Tomato Hybrids. 



13 



consideration were of this nature and all gave hybrid fruit that 

 was described as oblong or roundish. The other two crosses 

 were Yellow Pear x Yellow Cherry and Yellow Pear x Red Current. 

 The three varieties involved in these two crosses were small and 

 it is interesting to note that the hybrid fruit of the F 1 generation 

 was described as oval. This fruit was slightly larger transversely 

 than that of the round parent and the axial diameter had been 

 considerably increased. The tapering was equal toward each 

 end, therefore the constriction or neck was totally absent. 



TABLE OF CHARACTER UNIT CROSSES OF TOMATO. 







Xo. of 

 Distinct 

 Crosses 



Made 



Character of Hybrid Plants 



I 





Character of Units 

 Crossed 



Ft Generation 

 Character Dom- 



F 2 Generation 

 Dominants Recessives 



Ratio 





inant 



Xo. 





Xo. 







- 



Xo Xeck X Xeek 

 (Round X Pear Fruit) 



5 



Xo Xeck 



(Roundish or Oval) 



1 15 



84+ 



21 



16- 



5.47:1 



~ 2 Celled X Many-Celled 

 v. (Cherry X Large Fruit) 



5 



2 Celled 

 (Cherry Fruit) 



95 



79+ 



25 



21- 



3.8 :1 





Roundi>h Conic X 

 Roundish Comprised 



2 



Conical 



35 



73- 



13 



27 + 



2.8 :1 



- 

 - 



Red X Yellow Fruit 



4 



Red Fruit 



88 



73+ 



32 



27- 



2.75:1 





iRed X Pink Fruit 



6 



Red Fruit 



79 



76- 



25 



24+ 



2.16:1 



g 



o 

 i 



Pink X Yellow Fruit 



1 



Pink Fruit 



20 



83 + 



4 



17- 



5. :l 



? 



Yellow X Transparent 

 Skin 



9 



Yellow Skin 













liage 



Xorrnal X Potato Leaf 

 (Cut X Entire Margins) 



2 



Xormal or 

 Cut Leaf 



138 



73 + 



50 



27- 



2.76:1 



W 

 ~ 



Green X Yellow Leaf 



_ 



Green Leaf 



US 



76- 



38 



24+ 



3.1 :1 



s 



Standard X Dwarf or 

 Smooth X Rugous Leaf 



2 



Standard Stature 

 Smooth Leaf 



3, 



75 



12 



25 



3. :1 



■xture, < 



Pimpinellifolium X 

 Lycopersicum Leaf 

 (Pinnatifid X Xormal) 



3 



Pimpinellifolium 

 or Pinnatifid Leaf 













r i 

 0 



z 

 -t 



Pubescent Foliage X 

 Smooth Foliage 

 (Fruit the Same) 



1 



Pubescent 

 Smooth 



16 

 20 



67- 

 80+ 



8 

 4 



33 + 

 20- 



2. :1 

 5. :1 



Seeds were saved from the F t generation of these fiYe crosses, 

 and each lot was grown separately. A total of one hundred and 

 thirtY-six F 2 hybrid plants were brought to fruiting. Twenty- 

 one of these plants bore typical pear shaped fruit. Thus it is 

 seen that the recessive character had reappeared in 15.4' , of 



