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| genetics_into [2017/06/07 17:20] – [COLOUR (Concentration) [ C / cchd / cchl / ch / c]] becker | genetics_into [2023/01/25 22:20] (current) – [What gives the Rex its remarkable coat?] becker |
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| ====== An Illustrated Guide to Rabbit Coat Color Genetics* ====== | ====== An Illustrated Guide to Rabbit Coat Color Genetics* ====== |
| //*with an emphasis on Rex Rabbits ([[:rex_standard|see the Un-Official Rex Standard here]])// | //*with an emphasis on Rex Rabbits ([[:rex_standard|see the Un-Official Rex Standard here]])// |
| - The guard hairs carry the same **amount** of color as a regular length hair but they are considerably shorter. This means that the color of the hair appears more intense. Contrast that with long-coated rabbits like the angora when the same amount of color is spread out over a MUCH longer hair; these rabbits always appear to have pale colors. | - The guard hairs carry the same **amount** of color as a regular length hair but they are considerably shorter. This means that the color of the hair appears more intense. Contrast that with long-coated rabbits like the angora when the same amount of color is spread out over a MUCH longer hair; these rabbits always appear to have pale colors. |
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| | "The typical length of the single hair fiber of the Rex rabbit is 1.79–3.79 cm, with no statistically significant differences between hairs on various parts of the body (Tao 1994; Neirurerova et al. 2017). The diameter of the fiber is about 18–19 lm, and the hair density is 15 000–38 000 fibers/cm 2 (Tao 1994)." |
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| | Dorożyńska, K. and Maj, D. (2021), Rabbits – their domestication and molecular genetics of hair coat development and quality. Anim. Genet., 52: 10-20. https://doi.org/10.1111/age.13024 |
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| | [[http://ojs.upv.es/index.php/wrs/article/view/213/200|Tao, Y.R. (2010). Studies on the quality of Rex rabbit fur. World Rabbit Science, 2, 21-24.]] |
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| | [[https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0030073|LIPH Expression in Skin and Hair Follicles of Normal Coat and Rex Rabbits]] |
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| | [[http://europepmc.org/articles/PMC1086272/reload=0;jsessionid=zPH4vIzDXeQu8KW69JjE.8?fbclid=IwAR2UYTFu8npROdmdJ0SKr_zeafNKmNROEwaP4sP5MjXW6GQW9khNkyfNE-4|Linkage Interrelations of Three Genes for Rex (Short) Coat in the Rabbit]] |
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| | [[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1209310/?fbclid=IwAR2itD1q68nKjaqhryNJrofVZoBT5MwhukjHUqQqGTKLoK-UvJP9Ix0jN1U|A Case of Neighboring Loci with Similar Effects]] |
| ===== Basic Genetics ===== | ===== Basic Genetics ===== |
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| === Another Way to Look at It === | === Another Way to Look at It === |
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| The color concentration gene controls the amount of pigment in the hair; relative amounts shown as units of black 'B' and yellow( or red) 'Y' color. Imagine that the total amount of pigment in hair is the same for all hairs. As a result, shorter hairs appear darker (and also why long-haired varieties look faded). This explains the shading pattern found in seals, sables, torts, and the pointed colors. The color pattern of the chinchilla (c<sup>chd</sup>) is essentially the same as that for the agouti except that is lacks the reddish color in the mid-band. | The color concentration gene controls the amount of pigment in the hair; relative amounts shown as units of black 'B' and yellow( or red) 'Y' color. Imagine that the total amount of pigment in hair is the same for all hairs. As a result, shorter hairs appear darker (and also why long-haired varieties look faded). This explains the shading pattern found in seals, sables, torts, and the pointed colors. The color pattern of the chinchilla (C<sup>chd</sup>) is essentially the same as that for the agouti except that is lacks the reddish color in the mid-band. |
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| **C** = Normal **[BBBBYYY]**\\ | **C** = Normal **[BBBBYYY]**\\ |
| **c<sup>chd</sup>** = Dark Chinchilla **[BBBBY--]**\\ | **C<sup>chd</sup>** = Dark Chinchilla **[BBBBY--]**\\ |
| **c<sup>chl</sup>** = Light Chinchilla [shaded : seal & sable] **[BB-----]**\\ | **C<sup>chl</sup>** = Light Chinchilla [shaded : seal & sable] **[BB-----]**\\ |
| **c<sup>h</sup>** = Himalayan **[BB-----]** (with an added temperature-sensitive feature that prevents pigment from forming on the hairs when the follicles are warmest.\\ | **C<sup>h</sup>** = Himalayan **[BB-----]** (with an added temperature-sensitive feature that prevents pigment from forming on the hairs when the follicles are warmest.\\ |
| **c** = White [Albino : absence of color] **[-------]**\\ | **c** = White [Albino : absence of color] **[-------]**\\ |
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| |{{genetics:ook-06-10-01.jpg?175|}}|{{genetics:louise-04-02-01.jpg?175|}}|{{ :genetics:yaa4-2016-04-15_19-38-06_wm.jpg?nolink&175 |}}|{{ :stock:xyz:zowie:zowie-2016-08-24_17-53-27_wm.jpg?nolink&175 |}}|{{ :stock:imports:turin:turin-2015-05-03_14-16-02_wm.jpg?nolink&175|}}| | |{{genetics:ook-06-10-01.jpg?175|}}|{{genetics:louise-04-02-01.jpg?175|}}|{{ :genetics:yaa4-2016-04-15_19-38-06_wm.jpg?nolink&175 |}}|{{ :stock:xyz:zowie:zowie-2016-08-24_17-53-27_wm.jpg?nolink&175 |}}|{{ :stock:imports:turin:turin-2015-05-03_14-16-02_wm.jpg?nolink&175|}}| |
| ^ normal (C-) ^ dark chinchilla (c<sup>chd</sup>-) ^ shaded (c<sup>chl</sup>-) ^ californian (c<sup>h</sup>-) ^ white (cc) ^ | ^ normal (C-) ^ dark chinchilla (C<sup>chd</sup>-) ^ shaded (C<sup>chl</sup>-) ^ californian (C<sup>h</sup>-) ^ white (cc) ^ |
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| Bobby Schott, 1989, **Color Genetics of the Netherland Dwarf Rabbit**, Xavier Reference Publications, Douglasville Georgia | Bobby Schott, 1989, **Color Genetics of the Netherland Dwarf Rabbit**, Xavier Reference Publications, Douglasville Georgia |
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