There are many subspecies for wild animals, wild plant varieties, race for pets and cultivars for "selected" plant by man. These terms are based on geographical criteria (subspecies of wolf, local breeds of domestic animals), morphological resemblance of ecological specialization (wildlife) or uses for domestic animals (TICA ragdoll breeders). Excluding domestic species, biologists today so very little use the term race for subdivisions of lower level than the species. The concept of race is mainly used for pets, for which it is the counterpart of concept of subspecies in wildlife. Among the species existing in wild and domesticated.
Taxa to rank of race do not have scientific names internationaux1 their taxonomic division is usually based on subjective criteria and practices (especially used for the commercial designation). These variations are generally very low for selected races to ensure a certain standard, which is required for example special services to satisfy optimally a purpose of use. Against by the variability can be very large between geographic races.
The term race is still used to refer to subgroups of human species formed by inherited differences in skin color and morphology (narrow eyes, for example). The word "race" is also used in Article 1. However, if no distinction is well accepted in Anglo-Saxon countries, it is strongly rejected in others, where the use in a formal setting of a racial mention is prohibited, the term "Type "or" ethnicity "is preferred.
For natural species, subspecies or terms population (divergence and the group considered) are used. The use of biological criteria claiming define different human "races" within human species raises ethical questions and the subject of much controversy. This topic will not be developed here, but in article "human race".
Individuals of subspecies always remaining interbreeding, often observed within a species of being isolated populations, sometimes with morphological differences, sometimes ecological differences (ecotypes) no necessary correlation with their condition genetic differentiation.
An individual may have many characters. Thus, a yellow wrinkled peas does not belong to several races but defines a new variety: the yellow and wrinkled peas that may be awarded in homozygous form. On the other hand, all the characters are not visible, some are biochemical (such as the ability to feel a given molecule, blood, etc.), and also an individual of a species (plant or animal) has a large number of genes, so as to ability to define races.
They therefore can not be unambiguously defined in case of perfect isolation of two subspecies: geographically, for example. This explains the reluctance of biologists deal with the definition of "races" that still remains a matter of debate among scientists. In recent years, particularly since the Convention on Biological Diversity in Rio, FAO, OIE, the UN, NGOs and some international scientific bodies (IUBS, IUCN ...) are concerned about the accelerated disappearance of domesticated species . Dropoff window
It usually has the original condition, animal spawners to be in this race. This condition is not required for rearing ornamental chickens. When this condition is applied, the breed is genetically isolated, though this isolation may be recent, and sometimes provides for regular or special derogations. When it comes to a race of production, these criteria are usually combined with the performance, which is crucial general. In previous cases, race is a set of animals objectively homogeneous appearance and origin, though it is added development objectives of this homogeneity in one case, and performance improvement or various characters in other.
Taxa to rank of race do not have scientific names internationaux1 their taxonomic division is usually based on subjective criteria and practices (especially used for the commercial designation). These variations are generally very low for selected races to ensure a certain standard, which is required for example special services to satisfy optimally a purpose of use. Against by the variability can be very large between geographic races.
The term race is still used to refer to subgroups of human species formed by inherited differences in skin color and morphology (narrow eyes, for example). The word "race" is also used in Article 1. However, if no distinction is well accepted in Anglo-Saxon countries, it is strongly rejected in others, where the use in a formal setting of a racial mention is prohibited, the term "Type "or" ethnicity "is preferred.
For natural species, subspecies or terms population (divergence and the group considered) are used. The use of biological criteria claiming define different human "races" within human species raises ethical questions and the subject of much controversy. This topic will not be developed here, but in article "human race".
Individuals of subspecies always remaining interbreeding, often observed within a species of being isolated populations, sometimes with morphological differences, sometimes ecological differences (ecotypes) no necessary correlation with their condition genetic differentiation.
An individual may have many characters. Thus, a yellow wrinkled peas does not belong to several races but defines a new variety: the yellow and wrinkled peas that may be awarded in homozygous form. On the other hand, all the characters are not visible, some are biochemical (such as the ability to feel a given molecule, blood, etc.), and also an individual of a species (plant or animal) has a large number of genes, so as to ability to define races.
They therefore can not be unambiguously defined in case of perfect isolation of two subspecies: geographically, for example. This explains the reluctance of biologists deal with the definition of "races" that still remains a matter of debate among scientists. In recent years, particularly since the Convention on Biological Diversity in Rio, FAO, OIE, the UN, NGOs and some international scientific bodies (IUBS, IUCN ...) are concerned about the accelerated disappearance of domesticated species . Dropoff window
It usually has the original condition, animal spawners to be in this race. This condition is not required for rearing ornamental chickens. When this condition is applied, the breed is genetically isolated, though this isolation may be recent, and sometimes provides for regular or special derogations. When it comes to a race of production, these criteria are usually combined with the performance, which is crucial general. In previous cases, race is a set of animals objectively homogeneous appearance and origin, though it is added development objectives of this homogeneity in one case, and performance improvement or various characters in other.
This article collected, selected and written by: Author Van Hoc
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