S1 vs. serial backcrossing.

bron

bron

Well-Known Member
Folks-
What is the major difference between back crossing to S1 vs a traditional serial backcrossing to the mother plant. Genetically, does using an S1 for further breeding give a wider phenotype range than a back cross (cubing). Does S1-ing stabilize like cubing? Thanks. Bron
 
MtRainDog

MtRainDog

Well-Known Member
An S1 is similar to an F2 in terms of variation. It's like an F2, but made with a single plant.

Back-crossing will stabilize traits toward a P1 plant. Back-crosses can made toward either a mother or father plant. The latter is useful if you have a good male, then you can select females from the successive generations instead of the guess work of selecting a male each generation.

Carrying a line from F1 to F2 to F3 etc is good when you want to create and stabilize a new hybrid strain.
 
bron

bron

Well-Known Member
MtRainDog said:
An S1 is similar to an F2 in terms of variation. It's like an F2, but made with a single plant.

Back-crossing will stabilize traits toward a P1 plant. Back-crosses can made toward either a mother or father plant. The latter is useful if you have a good male, then you can select females from the successive generations instead of the guess work of selecting a male each generation.

Carrying a line from F1 to F2 to F3 etc is good when you want to create and stabilize a new hybrid strain.
Click to expand...
What is your process to recognize a superior male or is it more of a stab at an earlier stage. Suppose trichome and internode length etc
 
Poltrack

Poltrack

Member
bron said:
What is the major difference between back crossing to S1 vs a traditional serial backcrossing to the mother plant
Click to expand...
The gametes used.

bron said:
Genetically, does using an S1 for further breeding give a wider phenotype range than a back cross (cubing).
Click to expand...
Comparison is irrelevant because it mostly depend on the initial state.
A S1 made from a F1 anyway give a F2, a BX1 made from a stable F7 will mechanically be more stable at F8 without talking about the "best method".
What you're asking can't be generic.

bron said:
Does S1-ing stabilize like cubing?
Click to expand...
If the main traits of the female you're reversing are mostly homozygous, you will get clones in seeds. But calling them stable is abusive.
It's not possible in one shot with a BX, cubing-stuff or not.
 
You must log in or register to reply here.
Top