Agriculture Reference
In-Depth Information
what happens when we do our second backcross using the same
PARENT that we are keeping alive through cloning. Our second
backcross is referred too as SQUARING.
Since we are dealing with only 2 types of offspring Mm and MM we
will either repeat our results.....
Which is the same as our results from our first backcross. Or.........
All the offspring will be MM and thus true breeding for that trait.
Those offspring are the results of squaring. We have not really cubed
anything here, but this is a good example to get you started because it
shows how we can manipulate a population by backcrossing.
Cubing in reality is less controlled than this. Cubing is a way
of increasing the frequency in a population for a certain trait. It MAY
not result in true breeding but it will promote a trait in a bunch of
plants. Also the actual selection process is somewhat random.
In a population we select a mother plant that we want to keep
because of her features. In the same population we gather pollen from
50% of the males that have characteristics similar to the mother plant
