finnfur
Songster
Green legs post by Math ace 4/15/11 - [del genetics]
Quote:
I am going to try to explain my understanding of one theory. Then the genetic people can come correct me or offer other suggerstions.
With the leg color - - -
The girls only have one gene and it comes from dad.
The boys get two genes one from dad and one from mom.
So, if you girls are SHOWING green legs - - - it means they got it from dad.
Dad could be carrying one or two bad leg color genes.
The YELLOW is dominant so it can cover or dominate the green. Just because you see YELLOW on the rule does not mean he is not hiding the recessive green.
If the cockerels are showing green legs - - - it means they got it from MOM and DAD
(One gene from each )
WHAT CAN YOU DO - - - DEPENDS on how much time you want to invest.
I would not use any green legged male. He has two sets of the gene and will influence all off spring.
You will need to keep one of those green legged girls. You will need her to test future males.
Use a yellow legged roo and a green legged female as your parents (P1 generation) . . ... . Then proceed as follows
a.) P1 - - -Tainted pullets with roo that phenotype is correct but genotype is probably not pure
Yellow legged roo and a green / dusky yellow legged female/
b.) F1 - - KEEP pullets showing correct phenotype and therefore correct genotype since it is sex link gene
Girls only get one copy of the gene - - - so if it looks good, then it is good!
c.) F2 - - F1 pullets crossed with P1 roo (Use good looking hens from the F1 generation and cross to yellow legged roo)
Second generation of chicks - -- Keep good looking pullets ( Again)
1/2 of the cockerels should be good from this hatching, but you will need to TEST them to FIND them
d.) F3 - - TEST MATE cockerels from F2 to P1 hen . . .
One by one - - -you have to test the yellow legged cockerels produced in the F2 generation.
Mate them to the pure P1 hens.
each mating that produces 100% correct colored chicks ( males and females) means that F2 male is good and carries TWO good genes
each mating that produces ANY green legged chicks means that the F2 male is carring a recessive green gene and SHOULD NOT BE USED in future breedings.
The pullets that LOOK good are good . ... . DO NOT KEEP any male chicks from this F2 male.
I have been TOLD that this should work. . . I will be doing this in my flock very soon. My flock is just getting old enough to lay eggs.
By the way - - - I think the daddy roo looks a little shallow . . . If you have another yellow legged roo that has a wider body, I would use him to start the process off. That way, you will be improving the "Barn" of your future flock WHILE eliminating the green legged issue.
Edited by math ace - 4/15/11 at 4:10pm
Edited to add - I Bmailed Math Ace to join us to share her results - Tom
Quote:
I am going to try to explain my understanding of one theory. Then the genetic people can come correct me or offer other suggerstions.
With the leg color - - -
The girls only have one gene and it comes from dad.
The boys get two genes one from dad and one from mom.
So, if you girls are SHOWING green legs - - - it means they got it from dad.
Dad could be carrying one or two bad leg color genes.
The YELLOW is dominant so it can cover or dominate the green. Just because you see YELLOW on the rule does not mean he is not hiding the recessive green.
If the cockerels are showing green legs - - - it means they got it from MOM and DAD
(One gene from each )
WHAT CAN YOU DO - - - DEPENDS on how much time you want to invest.
I would not use any green legged male. He has two sets of the gene and will influence all off spring.
You will need to keep one of those green legged girls. You will need her to test future males.
Use a yellow legged roo and a green legged female as your parents (P1 generation) . . ... . Then proceed as follows
a.) P1 - - -Tainted pullets with roo that phenotype is correct but genotype is probably not pure
Yellow legged roo and a green / dusky yellow legged female/
b.) F1 - - KEEP pullets showing correct phenotype and therefore correct genotype since it is sex link gene
Girls only get one copy of the gene - - - so if it looks good, then it is good!
c.) F2 - - F1 pullets crossed with P1 roo (Use good looking hens from the F1 generation and cross to yellow legged roo)
Second generation of chicks - -- Keep good looking pullets ( Again)
1/2 of the cockerels should be good from this hatching, but you will need to TEST them to FIND them
d.) F3 - - TEST MATE cockerels from F2 to P1 hen . . .
One by one - - -you have to test the yellow legged cockerels produced in the F2 generation.
Mate them to the pure P1 hens.
each mating that produces 100% correct colored chicks ( males and females) means that F2 male is good and carries TWO good genes
each mating that produces ANY green legged chicks means that the F2 male is carring a recessive green gene and SHOULD NOT BE USED in future breedings.
The pullets that LOOK good are good . ... . DO NOT KEEP any male chicks from this F2 male.
I have been TOLD that this should work. . . I will be doing this in my flock very soon. My flock is just getting old enough to lay eggs.
By the way - - - I think the daddy roo looks a little shallow . . . If you have another yellow legged roo that has a wider body, I would use him to start the process off. That way, you will be improving the "Barn" of your future flock WHILE eliminating the green legged issue.
Edited by math ace - 4/15/11 at 4:10pm
Edited to add - I Bmailed Math Ace to join us to share her results - Tom
Last edited:
