Site Index          | Breast Color Pairings and Results The following will try to break down some of the possible genetic results of the following breedings. This is only discussing breast color and is not taking body or head color into consideration. The cock and hen pairings will be listed at the top in bold, with the possible outcomes below.
Breast Color: You should remember from our genetics discussion that breast color is an autosomal trait. This means both cocks and hens can be split for Lilac or White - or DF/SF for Purple (no bird can be split for purple as it is dominant over the other alleles). Because of this, I will focus mainly on inter-breast color pairings - because anytime a purple gene is present, it is going to be expressed (thus a DFPB x SFPB pairing will always result in visually purple breasted birds).
| PB Cock x PB Hen |
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| PB Cocks | PB Hens |
| PB Cock x LB Hen (or vice-versa) |
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| All of the babies would be PB/LB |
To save time here - note that in a pairing of a PB bird with a WB bird, the outcome would be the same - all babies would be PB/WB. Similarly, a pairing of a LB bird with a WB bird would produce all babies that are LB/WB.
| PB/WB Cock x WB Hen (or vice-versa) |
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| 50% PB/WB babies | 50% WB babies |
The results of this pairing would be similar for LB/WB with a WB bird - 50% being LB/WB, the other 50% being WB.
| PB/WB Cock x PB/WB Hen |
|---|
| 25% DFPB Birds | | 50% PB/WB Birds | | 25% WB Birds |
These results would be similar for a LB/WB x LB/WB pairing - with the results being 25% LB; 50% LB/WB and 25% WB.
With the recessive breast colors, a similar logic follows in terms of breeding two different heterozygotes ("splits") together - you will not be able to distinguish birds that are DF versus birds that are split for the recessive trait, and in the case of two different heterozgotes, you'd have no idea what the offspring were split for. For example, if you paired a PB/LB with a LB/WB bird, the results would be 25% PB; 25% PB/LB; 25% PB/WB; and 25% LB/WB. The only bird(s) you'd be able to visually identify and know their genetics would be the LB/WB which is the only birds you'd have that would not appear Purple Breasted.
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