(20a 



TaVjle V. 

 Selection experiment 1, mass selection. 



High series- parents with 6 or more spines 

 Low series- parents with 5 or ±ess spines. 



Mean of clone (52 ind . ) when selection began- 6,56 spines, 



Progeny produced in Difference oetween 



High series. low series. High and Low 

 Between 



selec- ind. mean sp.no. md. mean sp.no. means, 

 tionr, , 



1 and 2 49 6.57±.10 47 6. 35*. 10 .22±.14 



2 and 3 30 7.36±.12 23 5, 75*. 14 1.61i.l8 



3 and 4 9 7.76±.22 7 5.50±.25 2,26*. 32 



