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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Genetika zbarvení činčil
 Poslušná, Michala
There are same principles for color coat genesis for all mammals, both on a molecular level and when the final phenotype is created. Even in the early embryonic stage the cells for pigment deposition are distributed to the periphery parts of the body, skin cells and hairfollicles. The most important substance for color coat genesis is melanin pigment, whose synthesis is affected by melanocortin and two basic pigments eumelanin a pheomelanin are made by enzymatic cycles. The final phenotype is influenced by 5 or 6 basic genes, their mutations and interaction between them. Model system for showing the creation of color coat is mice. Chinchilla's, whom the work is dedicated to, genes and alelles haven't been described in exact way yet, but it is supposed, that basic principles are the same as in mice and the knowledge of color coat genetics in rodents are based on this claim. Breeders use allele indication made by themselves and genotype is determined by the animal's phenotype. The phenotype of offspring is determined by genotype of both parents.
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The level of utility qualities of Chinchilla chinchilla in the chosen breeding
 TUROŇOVÁ, Kamila
The main aim of this bachelor work was the analyzing of reproduction of indicators in private breedings. Furthermore, the growth abilities of chinchillas with colour mutations standard, black velvet and milkiness were appraised too. Altogether data were got from 1292 litters of chinchillas wavy color standard mutation from the period 1999 to 2008. Reproduction charakteristics were evaluated in number of born and weaning the youngs, the length of the interim and the size,weaning index of the litter depending on the order of the litter, the year of the monitoring and the membership of the family. The growth abilities of chinchillas colour mutations standard and black velvet were evaluated according to the order of the litters. Data about development of the live weight were made from data of 25 the youngs - standard colour mutation and 23 the youngs - black velvet mutation. Records of weights were taken place in 2009, on the day of the birth of the young and after every week until the young is 49 days. Data were summarized and statistically processed in MS Excel and Statistica Statsoft version 10. The analysis of reproduction characteristics found out on the average 1.82 the youngs born and 1.52 the youngs weaned with the average length of the interim 202.34 days. There were most often two youngs in the litter. The youngs of standard colour mutation evinced bigger average weight than the youngs of colour mutation black velvet.
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