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Rosy-faced lovebird colour genetics : ウィキペディア英語版 | Rosy-faced lovebird colour genetics
The science of rosy-faced lovebird colour genetics deals with the heredity of colour variation in the feathers of the species known as ''Agapornis roseicollis'', commonly known as the rosy-faced lovebird or peach-faced lovebird. Rosy-faced lovebirds have the deepest range of mutations available of all the ''Agapornis'' species. Generally speaking, these mutations fall into the genetic categories of dominant, co-dominant, recessive, and X-linked recessive (also called "sex-linked recessive"). While this seems fairly straightforward, it can quickly become confusing when a single specimen has multiple examples of these mutational traits. ==Base color== All rosy-faced lovebirds, without exception, belong to one of two base colors: Green-series (also referred to as Wild Green), which is a dominant trait, and Blue-series, which is a recessive trait. Within the Blue-series base color, there are currently two recognized variants – Dutch Blue (also known as Aqua) and Whitefaced Blue (also known as Turquoise). These recessive Blue-series traits of Aqua and Turquoise are alleles, and when an Aqua allele and a Turquoise allele are matched in a rosy-faced lovebird, the resulting variant is referred to as a "Seagreen" (also known as "AquaTurquoise"). As the Blue-series alleles are recessive, a bird must receive one of the blue-series alleles from each parent in order for the blue-series trait to be seen visually. A bird that has only one recessive gene for a specific trait is said to be "split" for that trait. Thus, a bird who receives a green base-color gene from one parent and a blue-series gene from the other parent would be visually Wild Green, as Green is dominant, but "split" for the blue trait.
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