PLANT Coors In Maize 107 
_ The dilute purples of F, were presumably all A b Pl7r’ and the dilute 
sun reds all A bplr’. Of the F, greens there should theoretically have 
been six types, namely, AbDPIR’, Abpl R’, abPlr’, abplr’, abPl R’, 
and abplR’. The relation of these plant colors to aleurone color and 
to a pericarp color known as cherry, present in these families, affords an 
opportunity of checking some of these hypothetical formulae. Cherry 
pericarp is a bright reddish purple, somewhat variable in intensity. In 
the parent of one of these F2 progenies it was sufficiently light to make 
possible the determination of the underlying aleurone color. The F2 seeds 
consisted of colored and colorless aleurone in the ratio 140:171, a devia- 
tion from a 27:37 ratio of 9.0 + 5.9, or such a deviation as might occur 
by chance three times in ten trials, P equaling 0.30. The F; plants were 
known to be Aaf#r, and in order to give a 27:37 ratio with respect 
to aleurone color they must have been also Cc. Cherry pericarp is of 
such a nature that it never develops except in the presence of Pl. With A 
and Pl it is cherry, but with a and Plit is brownish. It had been regarded 
by the writer as due to a factor, Ch, but recently Dr. E. G. Anderson has 
shown (by unpublished data) that the writer’s Ch is apparently another 
allelomorph of R, and at present it is known to exist only in the form r™. 
Since all dilute purples of the lots under consideration here are assumed 
to be A b Pl r®, they should all have cherry pericarp. Again, since dilute 
sun reds are pl pl, they should all have colorless pericarp. Furthermore, 
since all green plants from colored seeds are supposed to be R! R%, their 
pericarp should likewise be colorless. Finally, since the colorless seeds 
may lack color because of either aa, rr, or cc alone, or because of both 
aa and rr, some green plants from colorless seeds should have color- 
less pericarp, a R’ or Ack’, and some should have brownish pericarp, 
aPlr”. Of course all green plants with pl pl also must have colorless 
pericarp. 
The observed results are wholly in accord with these suppositions. In 
one I’, progeny, pericarp color was determined for all except a few plants. 
From seeds with colored aleurone, all the dilute purples had cherry peri- 
carp and all the dilute sun reds and greens had colorless pericarp. These 
three classes of plant and pericarp color showed frequencies deviating from 
the theoretical 27:9:18 relation by quantities such as might occur by 
chance almost once in four trials, P equaling 0.23. From seeds with 
colorless aleurone, all dilute purples had cherry pericarp, all dilute sun 
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