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326
ARTUR HÅKANSSON
Fig. 11—18. Godetia Whitneyi. 4n X G. Bottae. 1: early anaphase 1, one I ist at
the pole, tive I’s divide at the equator of the spindle. — <S’: låte anaphase 1, the
small Ts are divided, two Whitneyi chromosomes lag at the equator of the spindle.
— !): låte anaphase 1, three lagging Whitneyi chromosomes. the spindle is bent. —
10: interkinesis, two nuclei and eliminated chromosomes. — 11: interkinesis, only
one of the chromosome groups is surrounded of a nuclear membrane. — 12:
interkinesis, a restitution nucleus is formed by the chromosomes ön a bent spindle. —
13—16: interkinesis. — 11: p.m.c. showing early metaphase 2. — IS: anaphase 2.
Ii): pollen diad.
hybrids. This difference must be due to the fact, that the triploid
hybrids form seven I I’s from Ihe 14 Whitneyi chromosomes present,
while the diploid hybrids show a complete or nearly complete
asvn-desis. In diploid G. WhitneyiX. G. deflexa the I’s in inöst p.m.c.’s form
an equatorial plate, though often this plate was somewhat irregulär
because »die Chromosomen in etwas verschiedener Höhe liegen» and
some chromosomes often are lying at a greater distance from the plate.
Only möre rarely one or two I’s divide, in most cases undivided I’s
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