Butler, L.
J. W. Lesley sent me seed of this mutant which he had named and described as a chlorophyll deficient type. This mutant grows well in the adult stage and under high light conditions it is perfectly viable in the seedling stage. Under the low light intensities and poor germinating conditions which we encounter in the fall and winter, it behaves differently from any of the other known types. Germination is retarded, the first au plants come up in eight days, and the germination of the rest is spread over the next six weeks. The hypocotyl in the au plants is 2 to 3 times as long as the hypocotyl on au+ plants in the same flat.
The following linkage tests have been performed and indicate that this mutant is probably in group III or V:
Repulsion segregations
Linkage
Tester + + + tester au + au tester chi square
aw 126 40 25 5 .33
d 129 37 26 4 .35
m 126 40 25 5 .33
r 137 46 37 3 .01
br 519 254 152 20 31.6
c 458 129 117 43 .61
pe 133 50 50 7 5.00
u 140 44 45 12 .17
a 491 163 125 31 1.36
hl 746 389 263 73 23.1
mc 102 40 40 6 4.17
e 161 67 40 13 .73
wf 102 40 19 12 .70
pr 597 114 153 32 .87