Nothing is more easy than to tame an animal, and few things more difficult than to get it to breed freely under confinement, even in the many cases when the male and female unite.
I may add, that as some organisms will breed most freely under the most unnatural conditions (for instance, the rabbit and ferret kept in hutches), showing that their reproductive system has not been thus affected; so will some animals and plants withstand domestication or cultivation, and vary very slightly--perhaps hardly more than in a state of nature.
I cannot doubt that if other animals and plants, equal in number to our domesticated productions, and belonging to equally diverse classes and countries, were taken from a state of nature, and could be made to breed for an equal number of generations under domestication, they would vary on an average as largely as the parent species of our existing domesticated productions have varied.
HOW did Wales come to have 18 breeds
of sheep that are routinely identified as being uniquely Welsh?
Meanwhile other breeds
, such as the Llandovery White Face, saw its roots stretch back even further to the colonisation of Britain by the Romans.
An Introduction to Heritage Breeds
is a long-overdue book describing the importance of heritage livestock to the future of sustainable farming.
Biodiversity of pig breeds
from China and Europe estimated from pooled DNA samples: Differences in microsatellite variation between two areas of domestication.
According to that view, these groups then introduced the animals throughout Europe, so current European cattle breeds
would trace their ancestry directly back to early Near Eastern cattle.
Supervisors on Tuesday delayed for two months a vote on a proposal to require spaying and neutering for Rottweilers and pit bull dogs, while county officials examine expanding the requirement to cover other breeds
For centuries, humans have selectively coupled different dog breeds
But the Nelore is smaller than other breeds
and by nature takes longer to reproduce and reach slaughter weight.
Section three: 70 pages: offers more detailed information pertaining to particular breeds
Natalie Jeremijenko at New York University's Center for Advanced Technologyclones trees, George Gessert breeds
hybrid irises, and Steve Miller paints genetic portraits.
As Chowdhury explains, "The integrated approach would be part of a national plan involving changing the environment in which the mosquito breeds
, while educating the public through an aggressive media education campaign that they can play an important role in controlling the mosquito population.
Believe it or not, there are a few breeds
of sheep raised in the United States that have just that.