I -i INHERITANCE OF SOME CHARACTERS IN WHEAT. 



The unravelling of the F, in the first cross now enabled us to 

 deal with another cross (No. 5 on page 8) in which a pure line 

 from Punjab Type 9 was used as the felted parent. In this case the 

 F 2 material was dealt with direct as the F 3 generation of this cross 

 has not yet been grown. One hundred and ninety F 2 plants were 

 examined under the microscope and the glumes were compared with 

 the set of standards. The numbers obtained are given in the first 

 portion of table VI above, and they are very close to those expected. 

 In this cross the smooth parent was a pure line known as H II 4 . 



Thus it has been demonstrated that in the case of Punjab Type 

 9 the felting is composed of two kinds of hairs, each of which can 

 exist separately and is inherited independently of the other. 



Another case of complex felting, in which two kinds of hairs 

 are concerned, was met with in the second series of crosses made at 

 Pusa. In this case the felted parent was a pure line from the durum 

 wheat known as Pusa 20, the smooth parent being the line of common 

 wheat known as H III 8 . In the F x the felting was intermediate, 

 both factors being present, but both reduced in length and density. 

 In the F 2 the figures obtained were 481 felted to 36 smooth pointing 

 to the 15 : 1 ratio. Only 517 plants were grown in the F 2 and the 

 felted individuals formed a series as before. The details so far ob- 

 tained with this cross are given in the following table : — 



Table VIII. 



The /*'., generation of a cross between a complex felted durum 



and a smooth common wheat. 



Pusa 20 9 



H Ills ? 



