Something to think about.

 

Distinguish between wanted and unwanted traits.

Distinguish between dominant and recessive traits.

Distinguish between sexlinked and non-sexlinked traits.

Distinguish between linked and non-linked traits.

One should be able to identify the abovementioned.

 

 

Now we'll look at some of the possibilities.

 

 

If a wanted trait is dominant.

If a wanted trait is recessive.

If an unwanted trait is dominant.

If an unwanted trait is recessive.

If a wanted trait is sexlinked.

If an unwanted trait is sexlinked.

If wanted traits are linked with unwanted traits.

 

 

I'll give the following suggestions to think about:

 

 

If a wanted trait is dominant.

The trait is purebred through contol pairings. As an example you can imagine that you would only keep green budgerigars. You have to ensure that none of the green birds are split for blue. With 50 - 100 birds it would be a rather difficult task.

 

 

If a wanted trait is recessive.

The trait is purebred by inbreeding an selection. As an example you can imagine that you would only keep blue budgerigars and your material to start with was green birds split for blue. All blue chicks are to be kept and the green ones are to be culled. When all your birds are blue, this trait is purebred.

 

 

If an unwanted trait is dominant.

Culling and the problem is solved.

 

 

If an unwanted trait is recessive.

The trait are expressed through inbreeding and culled with.

 

 

If a wanted trait is sexlinked.

The trait is purebred in the same way you would do if you only want to keep e.g. opaline budgerigars. The hens express' the trait - if they got it - and can be selected. The cock birds, which can be split opaline, are paired to opaline hens. If none of the chicks express the trait, the cock is not split for opaline, and he plus the offspring are not kept. If however both hens and cocks among the chicks are expressing opaline, the cock is split opaline. Keep him if he is an outstanding cock plus the progeny that expresses opaline.

 

 

If an unwanted trait is sexlinked.

The trait is purebred in the same way you would do if you don't want to keep e.g. opaline budgerigars. Again it's the cock birds that makes it difficulty. If the hen does not express opaline, she don't have it. If you want to be sure if a normal cock is split opaline, you have to pair it to an opaline hen to see if any of the chicks produced are opaline.

 

 

If wanted traits are linked with unwanted traits.

The far apart the genes for these traits are located the greater is the chance that you can "swap" the unwanted traits with wanted traits through crossingover. But be aware that the "swapping" also can go the other way! So watch for these unfavourable crossingovers.

 

 

 

 

 

 

 

 

Information from PHT Budgerigars

Excellent topic Daz, and for me, perfectly timed. I will print this off and add to my files of valuable info

I was thinking of you when I found it. Kaz

 

Go to PHT Budgerigars and click on Genetics. It is one of the best i've found.

Edited November 24, 200618 yr by daz

very good daz but you need to think outside the box as well when pairing up remember some of the effects that certain colours and types have on your birds ie grey greens,violets,lutinos,opolines and cinnomens

very good daz but you need to think outside the box as well when pairing up remember some of the effects that certain colours and types have on your birds ie grey greens,violets,lutinos,opolines and cinnomens

 

Thanks Hath.

Can you give some examples please.

violets = smaller birds

 

lutinos = lack in head, mask quality

 

opalines = good size birds, head, mask and spots but are the main cause of flecking and op x op over a few generations will shorten the mask op carry good large spots but it is the hen that has more influance on spot size than the cock

 

cinnomens = feather quality only breed c x c one generation as it will concentrate th smaller finer feathers c x c also shortens the mask

 

greys = df greys are undesirable for exhibition purposes breed two together and size will be lost

 

grey greens = this colour for some reason seems to throw up good quality birds from the start so giving a good start but a lot of other people will have good grey greens as well so the classes are harder

 

cobalts = breeding co x co will give you poor colouration as well as patchiness to the breast

Hath this is great. I have been looking for this type of information. This is what we need to be looking at and discussing.

Hath, does spangles pairings do anything like the above, that you know of. I have a large green spangle boy with a large grey green spangle dominant pied and hope they are the right pairing.

violets = smaller birds

 

lutinos = lack in head, mask quality

 

opalines = good size birds, head, mask and spots but are the main cause of flecking and op x op over a few generations will shorten the mask op carry good large spots but it is the hen that has more influance on spot size than the cock

 

cinnomens = feather quality only breed c x c one generation as it will concentrate th smaller finer feathers c x c also shortens the mask

 

greys = df greys are undesirable for exhibition purposes breed two together and size will be lost

 

grey greens = this colour for some reason seems to throw up good quality birds from the start so giving a good start but a lot of other people will have good grey greens as well so the classes are harder

 

cobalts = breeding co x co will give you poor colouration as well as patchiness to the breast

 

Thank you!! Is there a website that talks more about these kinds of things in simple terms like this? Is there a place to go where they show actual photos to describe mask quality etc.? One more question...

When you say that breeding colbalt to cobalt that you can get patchiness to the breast.. does that mean that some of the white down kind of shows through the blue on the chest? and Should you not breed birds that have that? Sorry that was two more questions.... thanks

Shell

Hath, does spangles pairings do anything like the above, that you know of. I have a large green spangle boy with a large grey green spangle dominant pied and hope they are the right pairing.

 

spangle to spangle can affect the wing markings i prefer spangle to normal which in the show world is the prefered pairing but some people to pair spangle to spangle

 

Is there a website that talks more about these kinds of things in simple terms like this? Is there a place to go where they show actual photos to describe mask quality etc

 

i did know of one i will have a look to see if i can find it again

 

When you say that breeding colbalt to cobalt that you can get patchiness to the breast.. does that mean that some of the white down kind of shows through the blue on the chest? and Should you not breed birds that have that?

 

yes it does mean the white feathers underneath you can still breed with them but not two birds with the same fault and if the chicks have patchiness on the breast then i would not use that parent bird again as it is passing down that trait