loss of diversity in a reduced population is called population fragmentation.
loss of diversity in a reduced population is called population fragmentation.
loss of diversity in a reduced population is called?
population fragmentation
the process of domestication, by which only a choice few wild individuals are cultivated and selected against, often results in very strong selective pressures. this is evident in the genomes of these individuals as a lack of genetic diversity. in some cases this lack of diversity is seen as a selective sweep, whereby the variation at a particular locus of the genome is highly reduced while variation outside of this area is maintained or only partially reduced. in other cases, such as the coconut, genomic studies have revealed occurrences of a founder event, whereby the genetic diversity of an entire population is reduced due to a small number of individuals with low diversity being the isolated ancestors of a larger modern population. bottlenecks, where variation is reduced throughout the entire genome, are also evident in crop species such as pearl millet, cotton, common bean and lima bean. with the identification of bottlenecks in these species, researchers are able to study the effects on an organisms' ability to evolve past a bottleneck, and what effects this may have on the genomes of both individuals and populations as well as their fitness.
genomics of domestication
genetic diversity determines the potential fitness of a population and ultimately its long-term persistence, because genes encode phenotypic information. extinction risk has been associated with low genetic diversity because several researchers have documented reduced fitness in populations with low genetic diversity. for example, low genetic diversity as low heterozigosity has been associated with low juvenile survival, reduced population growth, low body size, diminished adult lifespan.
conservation genetics