Colors
Standard - Our Classic Grey Glider. There are some variations within it ranging from very dark(Black Beauties) to Reddish Tones(Cinnamon, Lion, etc.) to lighter hues(Buttercream, Strawberry, etc.)
Patterns
White Face - A glider that lacks the dark ear bars.
Mosaic - A sugar glider with various white patches & markings. There are several mosaic variations: White Mosaic, Ringtail Mosaic, Piebald Mosaic, etc.
Recessive Colors
Leucistic - A leucistic is a white sugar glider with black eyes. Also called a Black-Eyed White(BEW).
Albino - An albino is a white sugar glider with red eyes. Also called a T- albino.
Cremino - A cremino is an off-white sugar glider, with light cream markings and
burgundy eyes. Also called a T+ albino.
Platinum - A silvery/taupe colored sugar glider that often has a reduced/thin stripe. There are two Platinum lines - Haley & Silverbelle. The Platinum & Leucistic genes can interact to produce a Platinum glider.
Other Colors/Patterns
White Tip - A sugar glider with a white tip on it's tail.
Genetics
Dominant: The offspring show the color if they get the gene and
you only need one of a certain color parent to pass it. One mosaic and one
standard can produce mosaic joeys. The babies that are not mosaic will not carry
the mosaic gene. White face is the same, if it shows it's there. If it doesn't show
it's not there.
Dominant Inheritance Example: One parent (Ff) has a dominant color gene (F).
This gene over rides the normal color gene (f). The parent shows the dominant
color. When mated with a normal color sugar glider (ff) the offspring either get
the color (Ff) or do not (ff). There are no carriers. If the gene is present it
shows. (mosaic and white face)
Recessive: Gliders that inherit two copies of the recessive gene will show the recessive color. However, a glider that inherits only one copy of the recessive gene will be a carrier for it and can pass that gene along to its offspring. Physically, they will look like a standard grey glider. Recessive Colors include Leucistic, Platinum, Albino, and Cremino.
Recessive Inheritance Example: Both parents are carriers (Hh) Their genotype consists of the dominant wild-type (H) and the recessive (h). Their phenotype(or physical appearance) is that of the dominant wild-type color(standard grey).
Another Example: One parent shows the recessive color gene (hh) and one parent
is normal color (HH). ALL offspring will carry the recessive gene (Hh) because
the parent that shows the color only has that gene to pass.
Het: Het is short for heterozygous, and means possessing two different forms of
a particular gene, one inherited from each parent. In this case we are talking
about the color gene. A het is a normal color glider that carries a recessive color
gene.
Possible Het: A normal color sugar glider that has a chance to carry a recessive
color gene.
Recessive Breeding
This is the most confusing part of color breeding. Recessive breeding is where
we get hets and possible hets. Recessive colors include leucistic, albino,
cremino, & pure platinum(from non leu lines). The following information applies to all of them but I will use leucistic
as my example color. Normal applies to any sugar glider that is not from the
leucistic line.
Leucistic + Leucistic =
Notes: This type of breeding is often discouraged as it will produce only the recessive colored gliders. While we haven't seen issues such as "lethal whites" in the glider community, out-crossing is always preferred.
Leucistic + 100% Leu Het =
- Leucistic (50% of the time)
- 100% Leu Het (50% of the time)
Notes: This cross should be done after carefully analyzing the lines & pairings. The lines are more spread out where there may be acceptable pairings of this nature.
Leucistic + Normal =
Notes: All Normal color offspring that are carriers for the leucistic gene.
100% Leu Het + 100% Leu Het =
- Leucistic (25% of the time)
- 100% Leu Het (50% of the time)
- Normal (25% of the time)
Notes: Approximately 1 in 4 offspring will have the recessive color.
3 in 4 offspring will have the normal color.
2 in 3 of the normal color offspring will have the recessive
color gene, which is why the standard grey colored offspring are sold as 66% hets as they have a 66%(2 out of 3) chance
of having the leu gene.
100% Leu Het + Normal =
- 100% Leu Het (50% of the time)
- Normal (50% of the time)
Notes: Normal color offspring, sold as 50% possible leu hets.
Probability of a Carrier Inheritance Chart
Breeders can use
this chart to determine the likelihood a particular sugar glider is a carrier(often referred to as a het or heterozygous individual) for a color gene. The percent het is the probability, or chance, that the offspring will inherit the designed gene. A glider will either inherit the gene, making it a 100% het(aka a carrier for the gene) or it won't. For example, if you have a 33% het, the probability of that glider inheriting the gene is 33% while it has a 66% chance of not carrying it. You will need to carefully choose a pairing to prove out if the glider is indeed a carrier for the gene or not. Once the color is produced by a particular pair, you have proven your gliders carry the gene and records should be changed to reflect "100% het (proven)".
A
color calculator is also available - this can calculate the probability standard grey offspring inherit the recessive color gene & a few other neat things.