The genetic differences in apples may have
something to say about these cactus
Apples have so much genetic diversity that commercial farmers don't use apple seeds
to raise an orchard.
They graft cuttings from the specific variety they want. For example if
you germinate the seeds from a
golden delicious apple it will most likely produce a small sour apple. Most apples
grown from seed turn out to be sour - and historically used for making
cider, not eating.
Biologist traced apples back to their origin in central Asia. Here is an
edited explanation (will make you roll your eyes):
There are more than 7,500 known cultivars of apples resulting in a range
of desired characteristics. Cultivars vary in their yield and the
ultimate size of the tree, even when grown on the same rootstock.
In the wild, apples grow quite readily from seeds. However, like most
perennial fruits, apples are ordinarily propagated asexually by
grafting. This is because seedling apples are an example of "Extreme heterozygotes", in that rather than inheriting DNA from their parents to
create a new apple with those characteristics, they are instead
different from their parents, sometimes radically. Triploids have an
additional reproductive barrier in that the 3 sets of chromosomes cannot
be divided evenly during meiosis yielding unequal segregation of the
chromosomes (aneuploids). Even in the very unusual case when a triploid
plant can produce a seed (apples are an example), it happens
infrequently, and seedlings rarely survive. Most new apple cultivars
originate as seedlings, which either arise by chance or are bred by
deliberately crossing cultivars with promising characteristics.
OK, so I am saying that maybe these Peruvian
sacred cactus seeds are also unpredictable. There is no commercial interest in sacred cactus
so no one is spending millions of dollars to research their genetics. We
can assume that people valued trichocereus for thousands of years,
propagated them by cuttings based on the particular traits they liked.
They fall over naturally and self root; any fool can figure that out and
did for thousands of years. Growing them from seed is almost unnatural.
In 20+ years I have never encountered San Pedro spontaneously growing