Question on F1,F2,F3

[fullauto]

I've been doing a little reading on the breeding of autoflowers and its some confusin stuff(well, maybe for me anyway). I have crossed 2 different strains of autoflowers and had a successful seed crop,some of which i planted and sprouted. This new 1st run of seed and sprout is F1 correct? Now if i take a male and female of this run and breed them the next seedrun/sprouts will be F2 correct? Can someone explain what the F status means and what the number after means in terms of breeding?

 

[Bushdocter]

The F stands for "filial" the number is the sequence of generations following the parental generation, each generation being designated by an F followed by the number idicating its place in the sequence.

 

[The Squid]

F1 stands for Filial 1, the first filial generation seeds/plants offspring resulting from a cross mating of distinctly different parental types, or the same for that matter. And yes, your first cross is F1, second F2, and so on. This is a pretty basic answer. Cres may swing in with a lot more cooler info, but that covers your answers.

 

[fullauto]

Thanks Squid and Bushdoctor! So i'm guessing the further along the F #'s go the more stable the strain gets?

 

[The Squid]

Yes, as long as you're doing proper selections. Then at the end you can BX once or twice for vigor. Not as simple as I just made it sounds, but essentially that's what you can do.

 

[Bushdocter]

Thanks Squid and Bushdoctor! So i'm guessing the further along the F #'s go the more stable the strain gets?

stable could be for good or bad traits, thats where the art of the breeder comes in.

 

[fullauto]

By the art of the breeder you mean choosing the best male and female of the bunch to breed?

 

[Bushdocter]

exactly:thumbs:

 

[cres]

Heterzygous - a condition when two genes for a trait are not the same on each member of a pair of homologous chromosomes; individuals heterozygous for a trait are indicated by an "Aa" or "aA" notation and are not true breeding for that trait.(Clarke)

Homozygous - the condition existing when the genes for a trait are the same on both chromosomes of a homologous pair; individuals homozygous for a trait are indicated by "AA" or "aa" and are true breeding for that trait. (Clarke)

- Now the heterozygous and homozygous terms can be applied to one trait or a group of traits within an individual or a group of individuals. Depending on your point of reference, an individual or group can be considered both homozygous or heterozygous. For instance, say you have two individuals that are both short (S) and have webbed leaves (W) and have the following genotypes.
#1 = SSWW
#2 = SSWw
They are both homozygous for the short trait but only individual #1 is homozygous for the webbed leaf trait. Individual #2 is heterozygous for the webbed leaf trait and would be considered a heterozygous individual. As a goup, they would be considered heterozygous in general by some and homozygous by others. It would depend on your point of reference and the overall importance you place on the webbed leaf trait. Most would consider it to be heterozygous.
For example, the blueberry cannabis strain is considered a true breeding homozygous seed line because as a whole the many offspring have a similar look and produce a similar product. However there are often subtle differences between the plants of characters such as stem colour and potency. When taking a close look at blueberry, you will find heterozygous traits, but because of the whole overall look, we still generally consider them homozygous for the purpose of breeding programs. Using dogs is another way to explain this, take a dobie for example, you can tell the difference between dobies, but you can tell a dobie from another breed. Ya follow?

Hybrid - An individual produced by crossing two parents of different genotypes. Clarke says that a hybrid is a heterozygous individual resulting from crossing two seperate strains.

- For the purpose of seedbanks, a hybrid is in general, a cross between any two unrelated seedlines.
ANY HYBRID IS heterozygous and NOT TRUE BREEDING.

F1 hybrid - is the first generation of a cross between any two unrelated seedlines in the creation of a hybrid. F1 hybrids can be uniform or variable depending on the P1 parent stock used.

F2 hybrid - is the offspring of a cross between two F1 plants (Clarke). What Clarke and other sources don't make clear is do the two F1's need to be from the same parents? By convention they don't. As well, german geneticists often describe a backcross of an F1 back to a P1 parent as a F2 cross.

 

[fullauto]

Wow thanks for the info Cres! It may take me a while to figure all that out as i'm new to the breeding world of cannabis but thanks for takin the time to explain it!