Cerebellar vermis defect: a new neurobiological mutation in the rat

Article Abstract:

A neurological rat mutation that produces hind-leg paralysis and cerebellar cortical dysplasia, termed as the cerebellar vermis defect (CVD), is regulated by an autosomal recessive gene. Both sexes of the CVD rat are fertile and the gene has 100% penetration capacity. Animals affected with the disease have small cerebellums at birth and develop hind-leg paralysis by around 14 days of age. The paralysis continues with growth, and there is no improvement or progress of the disease for more than 18 months of age.

Mutation (Biology), Mutation, Paralysis, Rats as laboratory animals, Laboratory rats

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Allozyme polymorphisms discriminate among coast redwood (Sequoia sempervirens) siblings

Article Abstract:

The suitability of allozyme polymorphisms to distinguish clones of coast redwood was investigated. 10 polymorphic isozyme loci were sufficient to identify each individual within four selfed families. The high degree of polymorphism, and the addition of each new allele, increases the number of potential diploid genotypes. Generally, the higher rate of within-population genetic variation contained in a species, makes it more likely that clones can be distinguished.

Redwood, Sequoia (Redwood)

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Genetic relationships among Japanese native breeds of chicken based on microsatellite DNA polymorphisms

Article Abstract:

A study was conducted to analyze the genetic associations among Japanese native chickens based on microsatellite DNA polymorphisms. Nucleotide sequences were obtained from eight microsatellite clones that were randomly chosen. Alleles were assigned based on the size of the polymerase chain reaction product. Results indicated that microsatellite DNA markers are a useful tool for examining genetic relationships among chicken breeds.

DNA, Chickens

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