Viewing post #1736922 by clockworkhawkins

admmad said:@clockworkhawkins

Assuming that the ability to produce some 2n gametes is genetic then yes. In other plant species specific mutations have been found that cause errors that result in 2n gametes.


Both high temperatures and low temperatures are known to cause 2n gametes. That would occur during the development of flower buds. Temperatures of 110F (42-43C) during the development of seed have caused somatic doubling. The high temperature was applied as a temperature shock lasting 20-30 minutes at the time of the first division of the zygote. Treating apical or axillary meristems during the development of vegetative buds with very high or low temperature shocks may produce chromosome doubling. Twin seedlings sometimes have polyploid (more sets than normal) chromosome counts.

I was under the impression that the 2n gamete developed via pollen during the first stages of bud development? Correct me if im wrong but if the pollen develops as normal it produces a haploid. but are you saying you take the haploid pollinate the flower then crank the heat to 110 for the first half hour? I have my son for the next few days so I may be slow to reply. thanks very much for your information its been very educational. I have a few more questions ill be in touch when able