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ToDAY’s Snake of the Day – Sat. Feb. 23, 2013
#022313
Striped Tessera
Female
d.o.h. 2011
40″ long on February 21,, 2013
$450.00 shipped
This 2011 female Striped Tessera is now 40″ long and eating frozen/thawed adult mice Both parents are Striped Tesseras and she is also possibly het Amel and Caramel. If she is a Super-form (aka: a homozygote) Striped Tessera, breeding her to any type of corn will result in 100% Tessera progeny.
Details:
Striped Tessera (no aka)
Most Commonly Used Name: Striped Tessera
Mode of Genetic Inheritance: Dominant to wild-type
Morph Type: Either a Striped Tessera Heterozygote or Striped Tessera Homozygote (aka: Super-form).
Eye Color: Black pupil with ground zone-colored iris
FIRST, what makes Tesseras so expensive? Other than appearance, the primary (and inherent) value of Tessera-type Corns is their mode of inheritance. Since they are dominant to wild type, pairing any Ultra Type that is a Visual Het to ANY corn snake (other than a Tessera-type) will render 50% Tessera mutants in the F1 (first) out-crossedgeneration. The results of pairing an Tessera homozygote with ANY corn snake (other than a Tessera-type) will render 100% Tessera mutants.
Striped Tesseras are at least homozygotes of the recessively-inherited STRIPE mutation and the dominantly–inherited TESSERA mutation. At this time, there appears to be no direct mutational relationship between those two mutations (when in genetic union), except for the seemingly collateral features that distinguish virtually all Striped Tesseras from simple Striped mutants. The features that are demonstrated in most Striped Tesseras that distinguish them from simple Striped corn mutants are:
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Contiguity of pattern. Striped Tesseras have remarkably continuous striping and if it does break – unlike simple mutant Striped corns – it resumes in the same form – without fading to broken striping and eventually no striped pattern at all, as we see in ALL simple mutant Striped corns.
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Stripe that extends to the tail and beyond. I have never seen a simple mutant Striped corn that had a stripe that continued to the tail tip. I’ve seen nearly full striping in some lines of Striped Motleys, but never in Striped mutants. When one corn possesses both the STRIPE and the TESSERA mutations, most of these corns have striping that continues to the tip of the tail, regardless of how many stripe breaks there are between the neck and tail tip. When the striped pattern of Striped corn mutants begins to break up and/or fade, it does not resume in recognizable form. My reference to “tail pattern” is the dorsal location that is the polar opposite of the cloaca (polar as opposing points on the same vertical plane).
- Variable stripe width. It is not common, but some of the Striped Tesseras we’ve produced have varying stripe width, which is something seldom observed on simple Striped mutants. Generally speaking, the striping of Striped Tesseras widens as it extends tail-ward. Some have intermittent and abrupt changes of width from the neck to the tail, but except for gradual widening of stripe, some have remarkably clean stripes. The question that can’t help but be asked is, “In STRIPED TESSERAS, is the striped pattern the result of the Striped mutation, the striped version of the Motley mutation; Striped Motley. OR the striped version of the Tessera mutation?” I don’t know the answer at this time.
Note the comparison of a Striped Amel (Het Caramel) and a Striped Tessera in this image.
What to expect:
Striped Tesseras are still fairly rare. So far, the only feature that is atypical – compared to typical corn snake mutations – is that many of the non-mutant siblings of Tessera types seem to have enhanced pattern and color features. So far, I don’t recognize any traditional markers that are unique to hybrid colubrids, since the collateral sibling features to which I refer are – so far – in the realm of improving existing corn snake features (i.e. some non-Tesseras have better, brighter, cleaner, and/or more consistent colors and markings). I’m intrigued by the collateral nature of some of the non-Tessera siblings co-incidentally having improved characteristics without changing standard features of the species (i.e. body shape, belly checkering, head pattern, shape and number of markings).
As hatchlings, Striped Tesseras generally look like Striped corns, except for the precision of striping and retention of black pigment seen in most Striped Tesseras. Other than the obviously better quality of striping in Striped Tesseras, the primary difference between the closest corn snake phenotype (Striped Motley) and Striped Tesseras is that of the dominant genetic inheritance of the Tessera. Naturally, the Stripe and Motley mutations (which are alleles of the Motley locus) are inherited in recessive fashion. Just like all corns, Striped Tesseras gain improved color saturation as they mature.
History of the Tessera Mutation:
In 2007, Graham Criglow asked KJ Lodrigue to order a 1.2 trio of Striped Motleys that were advertised on one of the popular Online Classified sites – since Graham’s job prevented him from personally receiving them at that time. When they arrived, KJ discovered that they constituted a 2.1 reverse trio (two males and one female) instead of the advertised 1.2 trio (one male and two females). KJ and Kasi recommended that Graham gift the extra male to me, and that’s what Graham did. Profound thanks to Graham, KJ, and Kasi for that gracious and fortuitous gift. In 2008, both the Lodrigues and I independently bred our males (Graham’s and mine) to novel (unrelated) corns. I produced about 24 TESSERAS (so named by the Lodrigues for the tessellated lateral markings) from over 50 fertile eggs, but since the Lodrigues were in the middle of a career move to another State, they were less fortunate, producing just four non-mutant Okeetee-looking corns.
Tesseras were produced by the pairing of the male Tessera to three novel female corns (two F1 Locality Okeetees from Chip Bridges Rhett Butler Line and one Okeetee-ish female, Het for Stripe and Amel). Imagine my surprise in seeing what we thought were nearly flawless Striped Motleys from three different females, only one of which was Het for a recessive pattern mutation? After the first brood of 50% Tesseras hatched from the female that was het for Stripe and Amel, except for the perfection of pattern, I was not thinking new dominant mutation, but when both wild-type Okeetees produced the same results, it was obvious that a new mutation was discovered.
Upon receiving the reverse trio from the seller, we all commented on the mutual peculiarity of the phenotypes. Most appeared to be the most perfectly Striped Motleys ever seen – in so much as their dorsal stripes were nearly contiguous from neck to tail tip (something never before seen in any corn snake pattern mutant) – but that was hardly possible if the admission of the breeder were true – that they were products of pairing a Striped corn with an Okeetee corn. How could these descendants of a Striped corn bred to an Okeetee be Motley types, instead of Striped? It is still unclear if those 2.1 Tesseras were F1s (first familial generation) or F2s (the originator of this line is now out of the hobby and difficult to reach – for clarification). If these three Tesseras are F1s, my deduction is that the striped corn he used in the original pairing was actually Striped AND Tessera. Even if those three were F2s, the likelihood of the mutant patriarch being a Striped Tessera is strong.
In the 100+ Tessera mutants produced by me as of Fall, 2010, I’m seeing the following features:
The most obvious advantage of having Tesseras in your breeding