EFFECTS OF SELECTION ON ALKALOIDS IN BELLADONNA. 



9 



Table V. — Alkaloids in the leaves of first-generation belladonna plants from close polli- 

 nation and cross-pollination of selected parents at two stages of growth at Arlington, 

 Va., during the second season, 1914 — Continued. 





Alkaloidal content (per cent). 



Lot and number. 



Alkaloidal content (per cent) . 



Lot and number. 



First 

 stage, 

 Aug. 1. 



Second 

 stage, 

 Sept. 5. 



Average. 



First Secc 

 stage, sta 

 Aug. 1. Sep1 



xud 



*e, Avera 

 .5. 



ge. 



Lot 6w, cross-polli- 

 nated — Contd. 

 19 



0.997 



0.520 

 .559 

 .644 

 .608 



0.758 



Lot 7w, cross-polli- 

 nated — Contd. 

 8 



0.816 . ... 







20 



9 



10 



1.062 

 .690 



596 



579 



21 



1.124 

 1.138 



.884 

 .873 





22 



11 



.868 









12 



13 



838 









.952 



.634 





1.062 

 .990 

 .758 

 .885 

 .704 

 .983 . 



574 

 672 

 425 

 641 

 535 



818 







831 



591 





.948 

 .626 

 .898 



.771 

 .672 

 .693 

 .777 

 1.098 

 .777 

 .594 

 .834 

 .926 

 .822 

 .873 

 .657 

 .762 

 .837 

 .599 

 .809 

 .632 

 .707 



.859 

 .649 

 .795 



15 





16 



763 



1 



17 



fiiq 



2 



18 



983 



3 



19 



.739 



.758 



1.015 



.784 



.872 



.877 



1.036 



1.036 



.631 



394 

 897 

 732 

 813 

 620 

 798 

 823 

 823 

 345 



566 



4 



20... 



8?,7 





.704 

 .953 

 .624 

 .851 

 .756 

 .927 



.906 

 .865 

 .609 

 .842 

 .841 

 .874 



21... 



873 



6 



22 



798 





23 



746 



8 



24 



838 



9 



25 



Q9Q 



10 



26 



27 



Q9Q 



11 



488 





.950 

 .744 



1.193 

 .997 

 .882 

 .997 

 .694 

 .964 

 .709 



1.010 

 .797 

 .810 

 .790 



.803 

 .753 

 1.015 

 .798 

 .845 

 .814 

 .650 



Average 



Lot 3: 



1. 





13 



.865 



619 











15 



.452 

 .452 

 .306 

 .425 



319 





16 





17 



2 



528 





18 



3 



681 





19 



4 



365 





20 







Average 



Lot 23: 



1 







21 







.409 



473 





22 











23 



.687 

 .651 



.748 

 .665 





344 





24 







2 





472 





Average 



.855 



.753 





3 





517 















Lot 7w, cross-polli- 



.992 

 1.062 

 .864 

 .810 

 .911 

 1. 036 

 .568 



.672 



.832 



5.. 





448 -. 





6 





581 



505 



588 





1 



7 







2 



8 







3 



.596 

 .523 

 .553 

 .696 

 .463 



.730 

 .666 

 .732 

 .866 

 .515 



9 





502 





4 



10 





487 





5 









6 





497 





7 















Summary of Averages for the Various Lots. 



Lot. 



Alkaloidal 

 yield of 

 parent. 



Average alkaloidal content 

 (per cent). 



First Second 



Season. 



Lot. 0w, close pollinated. 

 Lot tiw, cross-pollinated. 

 Lot. 7w, close pollinated. 

 Lot 7-.v, 'to. -pollinated. 

 Lot 3, cross-pollinated . . . 

 Lot 23, cross-pollinated. . 



nigh. 



..do.. 

 ..do.. 

 ..do.. 

 Low. 

 ..do.. 



0.906 

 .952 

 .855 

 .865 

 .409 



0.765 

 .634 

 .753 

 .619 

 .473 

 .497 



0. 83f 

 .793 

 .804' 

 .742 

 .441 

 .497 



0.814 

 .773 



5931°— Bull. .",06— 15 2 



