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ÅKTUR HÅKANSSON
Fig. 1—3. Godetia nutans X G. hispiitula. Metaphase 1. 1: 2 II + 17 I. — 2: 1 III +
4 II -!- 10 I. — 3: 21 I. — Fig. 4—6 G. Whitneyi, 4n X G. Bottae. — i\ p.m.e. with
metakinesis. — 5: p.m.c. with metaphase 1. •— (i: metaphase 1. 7 11 + 9 1.
mination of tief lexa chromalids at anaphase 2 is frequent (H., 1943 a).
Meiosis in tlie diploid hybrid G. WhitneyiX G. Bottae showed complete
asvndesis with 7 large and 9 small I s. The Univalents had a tendencv
to form an equatorial plate. The I s were not divided at anaphase 1
(H., 1943 a).
The triploid hybrid G. Whitneyi, 4nXG. Bottae had 7 11 + 9 I.
The II’s resembled ordinary Whitneyi II’s and the number of chiasmata
is as high as in many races of G. Whitneyi, ring bivalents and
inter-stitial chiasmata being relatively common (compare fig. (i). The l’s are
small. After the disappearance of the nucleus membrane the I’s lie
scattered in the p.m.c. (fig. 4), hut when an equatorial plate wilh the
Il s bas been formed the I s assemble near the plate. Il seems thal also
1’s |bat are at a relatively great distance from the equator of the spindle
may liiove lo the plate. It is clear, however, thal il’ a I is lying at the
pole of the spindle, it does not make any movement, fig. 7 shows such
an I at anaphase 1, while 5 I’s divide in Ihe plate (three dividing 1’s
were not figured). The II’s occupy the cent re of Ihe plate, Ihe 1’s are
möre peripher. However, they do not as in Ihe triploid deflexa hybrid
form a regulär circle with as a rule the same distance between neigh-
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