Abstract
An
experimental cultivation of Undaria pinnatifida
was carried out in Naruto Strait, Tokushima Prefecture, by crossing
male/female gametophytes derived from one zoospore which was obtained
from two cultivar lineages (Y and H) from the Naruto area. Four
experimental cultivation areas were set, namely the hybrid stock (Y
male* H female, Y female* H male) and the true bred (Y male* Y female,
H male* H female) gained by the crossing. Morphological variations,
daily growth, and color tone were investigated in the experimental
cultivation. Based on the morphology of the frond, the hybrid stock
inherited the characteristics of the female. The daily growth of the
hybrid stock showed the half value of the true bred. This result
indicates the potential for cultivar improvement of Undaria
pinnatifida by crossing gametophytes derived from one zoospore.
