AN ANALYSIS OF THE EFFECT OF SELECTION. 



13 



The ''new" series, which was carried on at a constant temperature, 

 shows remarkably Httle fluctuation. Of the two reversed-selection 

 series, one suggests a positive result, but was not carried on long 



Table 9. — 1003, Inbred Plus Line. 



Generation. 



Fi 



F2 



F3 



F4 



Fs 



Fe 



F; 



F, 



F9 



Fio 



Fa 



New set: 

 Fi... 



F2... 



F3... 

 F4... 

 Fb... 

 Fe... 

 Ft... 

 Fa... 



114 

 231 

 446 

 1,199 

 1,142 

 632 

 283 

 584 

 373 

 269 

 133 



5,406 



167 



447 



377 



79 



73 



128 



92 



79 



1,442 



M 



5.070±0.051 



5.052=fc 

 5.473=fc 

 5.126± 

 5.658± 

 5.389± 

 5.675± 

 5.202=4= 

 5.507=fc 

 5.952=*= 

 6.158=fc 



.039 

 .025 

 .018 

 .014 

 .022 

 .027 

 .023 

 .027 

 .018 

 .026 



5.850=1=0.021 



5.978=±: .011 



5.889=±: .020 



5.886± .031 



5.904=t .046 



5.969=fc .026 



5.935=*: .027 



5.937± .045 



0.815=t0.036 



.886=t .028 



.784=t .018 



.922=fc .013 



.720=t .010 



.853=t .015 



.683=t= .019 



.826=t .016 



.763=fc .019 



.450=t .013 



.456=t .018 



0.362=t0.014 



.340=fc .008 



.563=t .014 



.422=fc .022 



.578=fc .032 



.429=*= .018 



.381=t .019 



.534=*= .031 



+ .157=4=0.031 



+ .153=fc .019 



- .024=*= .020 

 + .381=*= .024 



- .305=±= .036 

 + .431=*= .022 

 + .205=*= .033 

 + .115=t .040 



- .025=*= .058 



1-0.038=^0.046 

 - .009=*= .032 

 + .048=*= .034 

 1+ .123=*= .042 

 i_ .062=*= .072 

 1- .031=t .039 



Diff. M. 



-0.930 



- .948 



- .661 

 -1.113 



- .397 

 -1.029 

 -1.127 

 -1.122 



- .690 



- .128 



- .477 



+0.087 



- .668 

 -1.114 



- .096 



-1.165 



- .063 



Reversed Selection. 



0.989=t0.060 

 .890=*= .063 

 .753=*= .044 

 .845=*= .084 

 .993=*= .042 



0.463±0.032 

 .000=1= .000 

 .573=*= .028 



+ 1.339 

 + .652 

 + .147 

 + 1.239 

 + 1.180 



+0.898 

 + .500 



^Includes reversed selection, that is, not included in the remainder of these data. 



enough to be significant, and the other was clearly without effect. 

 The line was now presumably uniform, and not capable of modifica- 

 tion through further selection. 



CROSSBRED PLUS SERIES. 



The material for this series came from the following sources: Cul- 

 tures 902, 926, 1006, 1081 of the 864 inbred plus fine; culture 1072 of 



