Saturday, January 30, 2010

Gene Pool And Population Factors

A population may be described as a breeding group that possesses gene continuity from one generation to the next. Currently a growing body of dog experts believe that the dog evolved as a new species from the wolf to occupy a developing niche about 15,000 years ago. That developing niche revolved around human waste dumps; opportunistic wolves began inhabiting those waste dumps for easily available food supplies.

All told, 15,000 years on the evolutionary scale is an extremely brief period for a new species to evolve from another, suggesting that there must have been a considerable amount of inbreeding amongst those opportunistic waste-dump-frequenting wolves to propagate the tameness trait in so short a time span! Compounding this issue of limited genetic pool, a growing number of dog researchers now believe that the original genetic ancestry of the dog evolved from only three female wolves that inhabited China several thousand years ago (the so called eves of dog evolution).

The important point to note here is that even before mankind began his intensive trait-specific breeding program of the dog, and due to its unorthodox super-accelerated evolution, the dog gene pool right from the get go was rather limited!

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