2. Miscellaneous observations.
In
addition I would like to report that:
a. Branched ear, reported last year, is perhaps "ramosa" since the tassel is now known to be affected, too.
b. In
cloudy weather "zebra" shows up poorly. The light stripes appear to
be the result of chlorophyll destruction, which is more rapid the greater the
light intensity.
c. "Embryoless"
or germless (gm) is linked with
albino (w) with 12% crossingover
on the basis of pedigree 482(7).
|
Record: |
84 embryoless out of 3.58 |
|
|
274 normal ‑‑‑
246 green + 20 albino |
This albino is yet unidentified as to location and originated as a mutant from Cornell 45‑61(6)�.
d. A
yellow seedling (luteus) on chromosome 6 closely linked with pigmy: 4811 45 =
58 green + 39 yellow + pigmy out of 150 seeds sown. (Pigmy does not reduce the
expected 1/4 tall yellows.) This yellow seedling is linked with W1
(locus 61 on chromosome 6) with about 10% crossingover: 4811 10 = 87 green + 7
yellow + 41 white + pigmy out of 200 seeds. Assuming:
|
WWLL |
WWll |
wwLL |
wwll |
|
green |
yellow |
albino |
albino |
|
87 |
7 |
7 |
34 |
|
|
|||
|
r |
s |
s |
r |
|
5.2 |
.6 |
.6 |
5.2 |
Linkage = cross
overs = 1.2 = 10%
total
11.6
H. C. Eyster