Genetic parameters for the size of udder cisterns in ewes diagnosed by ultrasonography among breeds: Improved Valachian, Tsigai, Lacaune and their crosses  

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F15%3AN0000002" target="_blank" >RIV/00027014:_____/15:N0000002 - isvavai.cz</a>

Result on the web

<a href="http://www.uco.es/organiza/servicios/publica/az/php/img/web/11_13_34_16_3650.pdf" target="_blank" >http://www.uco.es/organiza/servicios/publica/az/php/img/web/11_13_34_16_3650.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Genetic parameters for the size of udder cisterns in ewes diagnosed by ultrasonography among breeds: Improved Valachian, Tsigai, Lacaune and their crosses  

Original language description

Udder cistern size in ewes was diagnosed by ultrasonography, using a 3.5MHz linear probe applied laterally from side or ventrally from bottom. The acquired ultrasound images were used to digitally determine the left and right cistern sizes. Both cisterns were scanned approximately 12 hours after the last milking. The area of the left (ALC1; 1933.35 mm2) and right udder cisterns (ARC1; 1970.72 mm2), were determined using from side scans of 378 ewes, obtained at different phases of the lactation cycle), for a total of 1198 measurements. The area of the left (ALC2; 2137.67 mm2) and right udder cisterns (ARC2; 2171.12 mm2) as determined using from bottom scans, from 265 ewes; for a total of 753 measurements. The sums of both cross-sectional areas detected by the method from side (SLRC1) was 3904.07 mm2, and by the method from bottom (SLRC2) was 4308.77 mm2. Primary data were processed using REML methodology and the multiple trait animal model, using the programs REMLF90 and VCE 4.0. In the models, animal was ascribed as a random additive genetic effect and ewe as a permanent effect. Control year (7 or 5 levels), lactation stage (4 levels), breed group (9 levels) and parity (3 levels) were all ascribed as fixed effects. We found higher values of heritability (h2) for the parameters determined by the method from bottom. Heritability coefficients for ALC1 and ALC2 were 0.07 and 0.18 respectively, for ARC1 and ARC2 were 0.17 and 0.2 respectively, and for SLRC1 and SLRC2 were 0.12 and 0.17 respectively. Genetic correlations between ARC1 and ARC1 or ARC2 and ARC2 were high (rg= 0.73 and 0.91). Similarly, the correlations between the size of left and/or right cistern and the total size of both cisterns were high using both ways of scanning (rg= 0.90 to 0.98). In conclusion, measuring the size of the udder cisterns from side is recommended, although measurements from bottom show slightly higher heritability coefficients.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GI - Farm animal breeding and farm animal pedigree breeding

OECD FORD branch

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Project

<a href="/en/project/QJ1310184" target="_blank" >QJ1310184: Breeding on offspring survival in beef cattle and sheep.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Archivos de Zootecnia

ISSN

0004-0592

e-ISSN

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Volume of the periodical

64

Issue of the periodical within the volume

248

Country of publishing house

ES - SPAIN

Number of pages

6

Pages from-to

403-408

UT code for WoS article

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EID of the result in the Scopus database

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