3.4.3 Sex pheromone production
Analyses using GCMS did not detect sex pheromones from the female
gametes of parthenogenetic population p28 (Figure. 8). The compounds
predicted as brown algal sex pheromones were detected only from the
positive control (female gametes from sexual populations p15) with high
intensity at around 12.1 and 14.6 min (Figure. 8). In the similarity
search for the first compound, the first candidate was
6-[(1Z )-1-butenyl]-1,4-cycloheptadiene [ectocarpene (Maier
& Müller, 1986); similarity value = 97%] and the second candidate
was 6-[(1E )-1-butenyl]-1,4-cycloheptadiene (thecis-trans isomer of ectocarpene; similarity value = 93%). For
the second compound, the first candidate was ectocarpene (similarity
value = 95%) and the second candidate was
(3E ,5E ,8E )-1,3,5,8-undecatetraene (similarity value
= 91%).