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Scientists Shearin, Ostrander Study 300 Dog Breeds & Canine Genes
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by Paul Conneally | March 2, 2010 at 11:31 am
545 views | 26 Recommendations | 4 comments
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The dog is thought to be the most varied mammal on earth. Even Darwin marveled at the diversity of dog shape, size and colour.
There are over 300 recognized domestic dog breeds across the world and they are all of the same species, Canis familiaris, which means that they can interbreed to produce puppies.
Scientists Abigail L. Shearin and Elaine A. Ostrander have been studying the genetic make up of dogs to find out why so many species breed effectively. The study published today is called 'Canine Morphology: Hunting for Genes and Tracking Mutations'.
We've been selectively breeding dogs over a number of years to create new breeds so dogs offer closed breeding populations, which makes it easier than studying genetic effects on human populations.
The authors hope that by studying dogs' genetic diversity they might shed further light on the study of the human genome and how human genes link to produce diversity. This could in turn lead to future medical breakthroughs.
In this essay we consider some of the features of the canine genome relevant for successful studies of selected traits. We discuss current hypotheses regarding the development and maintenance of genetic variation in dogs today. We consider examples in which identified genes account for unique, and sometimes complex, phenotypes. Finally, we consider the implications of these findings for studies of true complex traits, such as those associated with behavioral genetics.
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Most RecentMost Recommended Comments (4)
at 11:59 on March 2nd, 2010
How many species of cats are there?
Let me see.
"There are 0.4746484657 species of cats, including the none-cat
There are 64 million house cats in America. The total number of cats in the world is not recorded. There is limited biological data on all of the wild cats due to the difficulty in tracting the often times elusive (or shy) behavior of many of the breeds. There are 36 species of wild cats. Most species are further divided into subspecies, based on physical distinction and/or geographic separation Leopard (Panthera pardus) Amur leopard (P.p.orientalis) Northern Chinese leopard (P.p.japonensis) African leopard (P.p.pardus) Asian leopard Clouded leopard (Neofelis nebulosa) Jaguar (Panthera onca) Tiger (Panthera tigris) Cougar (Puma concolor) Ocelot (Leopardus pardalis) Margay (Leopardus wiedii) Jaguarundi (Herpailurus yagouarundi) Fishing Cat (Prionailurus viverrinus) Serval (Leptailurus serval) Caracal (Caracal caracal) Bobcat (Lynx rufus) Lynx (Lynx lynx) Leopard cat (Prionailurus bengalensis) Other Cat Species * African golden cat (Profelis aurata) * Andean mountain cat (Oreailurus jacobita) * Asian golden cat (Catopuma temminckii) * Black-footed cat (Felis nigripes) * Bornean bay cat (Catopuma badia) * Canadian lynx (Lynx canadensis) * Cheetah (Acinonyx jubatus) * Chinese mountain cat (Felis bieti) * Flat-headed cat (Prionailurus planiceps) * Geoffroys cat (Oncifelis geoffroyi) * Iberian lynx (Lynx pardinus) * Jungle cat (Felis chaus) * Kodkod (Oncifelis guigna) * Lion (Panthera leo) * Marbled cat (Pardofelis marmorata) * Oncilla (Leopardus tigrinus) * Pampas cat (Oncifelis colocolo) * Pallas cat (Otocolobus manul) * Rusty-spotted cat (Prionailurus rubiginosus) * Sand cat (Felis margarita) * Snow leopard (Uncia uncia) * Wildcat (Felis silvestris) "
at 13:18 on March 2nd, 2010
at 13:45 on March 2nd, 2010
Nice piece, and cute pics!
at 15:40 on March 2nd, 2010
a poodle pees
at the base of a street oak
yellow crocus