Xo.5S.Vj 



INHERITANCE OF HABIT 



557 



ners. The runners are probably really c in type or c 

 and d. 



In the cross of Giant Stringless and Blue Pod the 

 parent types were both isolated. No semi-runners were 

 noted, as would be the case if the cross were No. 21 in 

 type. 



Cross Type 25 or 26. Alt X aLT or alt 

 Eefugee Wax is a semi-runner bean. The F 3 isolated 

 lots of this variety crossed with Blue Pod were all more 

 or less erect. Some lots homozygous for axial branch- 

 ing were isolated, many individuals of which showed 

 signs of climbing. The semi-running and climbing 

 branches were short, confirming the assumption that 

 neither variety used possesses the factor for a long axis. 

 The climbing tendency exhibited shows that there must 

 be strains of Blue Pod that possess T. Previous data are 

 in harmony with this. 



Cross Type 29, 30, 34 or 35. aLT or aLt X alt or alT 

 Many crosses of bush beans with those of spreading 

 type give a 3 : 1 proportion in the F 2 and later hetero- 

 zygous lots. 



In Keeny Rustless, a variety of the spreading type, 

 with its almost runner-like branches, by Red Valentine 

 some lots with the spreading habit have been isolated, 

 also more or less runner-like forms and one with the erect 

 habit of Red Valentine. The axial and terminal inflores- 

 cence is inherited in a 3 : 1 proportion. Notes on type in 

 one heterozygous lot show five erect and 10 plants with 

 outstretched branches. 



In the cross of Black Valentine and Prolific Black Wax 

 one lot with outstretched branches was isolated; all 

 others were of the erect type. 



In the cross of Blue Pod Butter and Prolific Black Wax 

 no spreading types with outstretched branches were 

 noted, but this is not surprising, as in an F 4 generation 

 the parent plants selfed for planting may not have hap- 



