scholarly journals Genetic Diversity of Hair Colour in Horses

2005 ◽  
pp. 40-45
Author(s):  
Zsuzsanna Tóth
Keyword(s):  
Genetic Factors ◽  
Coat Colour ◽  
Melanin Content ◽  
Hair Colour ◽  
Factors Influencing ◽  
Direct Measurements ◽  
Horse Hair ◽  
L Value ◽  
Biological Component ◽  
Colour Classes

The main aim of this study was to analyze sources of variability for coat colour expressed as a quantitative trait as well as to determine non genetic factors influencing horse colour variation and shades. Traditional Hungarian horse breeds such as Lipizzan (grey), Gidran (chestnut), Shagya Arabian and Arabian Pure Bred (grey) and Nonius (bay and black) horses were involved in the current study. We report results using direct measurements of horse coat colour using objective colorimetric dimensions and a spectrophotometer for determining hair melanin. Correlation analysis indicated that the single biological component that correlated best with the total melanin content of horse hair is the L* value (r=-0.858, p<0.0001). Subjective colour classes and coat colour variables L* and a* were obviously related, with R2 values of 0.88 and 0.46 respectively, with a lower R2 for b* of 0.22 (all p<0.001).

Lipoprotein (a) Evolution: Possible Benefits and Harm. Genetic and Non-Genetic Factors Influencing its Plasma Levels

2017 ◽  
Vol 24 (10) ◽  
pp. 969-978 ◽  
Author(s):  
Peggy M. Kostakou ◽  
George Hatzigeorgiou ◽  
Vana Kolovou ◽  
Sophie Mavrogeni ◽  
Genovefa D. Kolovou
Keyword(s):  
Plasma Levels ◽  
Genetic Factors ◽  
Lipoprotein A ◽  
Factors Influencing

GENETIC FACTORS INFLUENCING THE COMMON NEUROBIOLOGICAL SUBSTRATE FOR MENTAL DISORDERS

2019 ◽  
Vol 29 ◽  
pp. S798
Author(s):  
Till Andlauer ◽  
Thomas Mühleisen ◽  
Felix Hoffstaedter ◽  
Alexander Teumer ◽  
Anja Teuber ◽  
...  
Keyword(s):  
Mental Disorders ◽  
Genetic Factors ◽  
Factors Influencing ◽  
The Common

Mapping of genetic factors influencing the weight of cystic fibrosis knockout mice

2002 ◽  
Vol 13 (11) ◽  
pp. 614-618 ◽  
Author(s):  
Christina K. Haston ◽  
Mary Corey ◽  
Lap-Chee Tsui
Keyword(s):  
Cystic Fibrosis ◽  
Knockout Mice ◽  
Genetic Factors ◽  
Factors Influencing

scholarly journals Genetic factors influencing bone mineral content in a black South African population

2013 ◽  
Vol 31 (6) ◽  
pp. 708-716 ◽  
Author(s):  
Andrew May ◽  
John M. Pettifor ◽  
Shane A. Norris ◽  
Michèle Ramsay ◽  
Zané Lombard
Keyword(s):  
Bone Mineral Content ◽  
South African ◽  
Bone Mineral ◽  
Mineral Content ◽  
Genetic Factors ◽  
African Population ◽  
South African Population ◽  
Black South African ◽  
Factors Influencing

Genetic Factors Influencing High Oleic Acid Content in Spanish Market‐Type Peanut Cultivars

Crop Science ◽  
2001 ◽  
Vol 41 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Yolanda López ◽  
Olin D. Smith ◽  
Scott A. Senseman ◽  
William L. Rooney
Keyword(s):  
Oleic Acid ◽  
Acid Content ◽  
Genetic Factors ◽  
Oleic Acid Content ◽  
High Oleic Acid ◽  
High Oleic ◽  
Factors Influencing ◽  
High Oleic Acid Content ◽  
Peanut Cultivars

O55. The Genetic Factors Influencing Externalizing Psychopathology Overlap With Those Influencing Neurocognition and Show Developmental Variation

2019 ◽  
Vol 85 (10) ◽  
pp. S128
Author(s):  
Josephine Mollon ◽  
Emma Knowles ◽  
Samuel Mathais ◽  
Amanda Rodrigue ◽  
Marinka Koenis ◽  
...  
Keyword(s):  
Genetic Factors ◽  
Externalizing Psychopathology ◽  
Developmental Variation ◽  
Factors Influencing

Inaccuracy and Bias in Textbooks Reporting Psychiatric Research: The Case of the Schizophrenia Adoption Studies

2000 ◽  
Vol 19 (1) ◽  
pp. 89-99 ◽  
Author(s):  
Jay Joseph
Keyword(s):  
Genetic Factors ◽  
Psychiatric Research ◽  
Adoption Studies ◽  
Secondary Sources ◽  
Inaccurate Information ◽  
Factors Influencing ◽  
Rubber Stamp ◽  
Genetic Position ◽  
Widespread Acceptance ◽  
Selective Placement

Mental health textbooks sometimes provide inaccurate information, typically supporting common beliefs in the field. Psychiatry and psychology textbooks' discussion of the schizophrenia adoption studies is examined. Particular attention is paid to the earlier studies, which helped pave the way for the current widespread acceptance of the importance of genetic factors influencing psychological trait differences. This article compares the accounts of 30 textbooks to the original studies they reviewed. Generally, problems with these textbooks' accounts include (1) the failure to critically assess the original researchers' methods and conclusions, (2) some textbooks' reliance on secondary sources, (3) the failure to discuss published critiques of the schizophrenia adoption studies, (4) inaccuracy in reporting the original findings, (5) the claim that studies finding nonsignificant results support the genetic position, and (6) a failure to discuss the potentially invalidating environmental confounds in the schizophrenia adoption studies (through the selective placement of adoptees). It is concluded that, in general, these textbooks have served to rubber-stamp mainstream psychiatry's questionable claims about the schizophrenia adoption studies at the expense of a thorough critical analysis.

Differences in melanin type and content among color variations in American mink (Neovison vison)

2020 ◽  
Vol 100 (3) ◽  
pp. 418-425
Author(s):  
Dominika Grabolus ◽  
Patrycja Wacławik ◽  
Magdalena Zatoń-Dobrowolska
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
American Mink ◽  
Coat Colour ◽  
Pigment Cells ◽  
Resonance Spectroscopy ◽  
Wild Type ◽  
Hair Colour ◽  
Black Cross ◽  
Fur Animals

Coat colour is one of the most important qualitative traits of fur animals. Determining melanin pigments forming the basics of visible coat colour may contribute to a better understanding of the process of creating different coat colour variations in fur-bearing animals. This study aimed to (i) isolate pigment cells from the hair of American mink of 11 colour variations (standard brown, silverblue, palomino, black, wild type, sapphire, black cross, pearl, palomino cross, glow, and amber) using acid and alkali; and (ii) characterise the melanin pigments obtained. The purified pigment cells were observed under a light microscope and verified by spectrophotometry scanning and nuclear magnetic resonance spectroscopy. The method allowed for obtaining pure melanin specimens. Using acid and alkali to extract eumelanosomes did not affect their shape and structure; it also allowed for obtaining pheomelanin from the hair. The results have proven that the hair colour of the American mink is based on all types of melanin, and that its variations differ in terms of how much eumelanin and pheomelanin the hair contains.

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