Potential for Genetic Improvement of the Main Slaughter Yields in Common Carp With in vivo Morphological Predictors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F18%3A43897292" target="_blank" >RIV/60076658:12520/18:43897292 - isvavai.cz</a>

Result on the web

<a href="https://www.frontiersin.org/articles/10.3389/fgene.2018.00283/full" target="_blank" >https://www.frontiersin.org/articles/10.3389/fgene.2018.00283/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fgene.2018.00283" target="_blank" >10.3389/fgene.2018.00283</a>

Result language

angličtina

Original language name

Potential for Genetic Improvement of the Main Slaughter Yields in Common Carp With in vivo Morphological Predictors

Original language description

Common carp is a major aquaculture species worldwide, commonly sold alive but also as processed headless carcass or filets. However, recording of processing yields is impossible on live breeding candidates, and alternatives for genetic improvement are either sib selection based on slaughtered fish, or indirect selection on correlated traits recorded in vivo. Morphological predictors that can be measured on live fish and that correlate with real slaughter yields hence remain a possible alternative. To quantify the power of morphological predictors for genetic improvement of yields, we estimated genetic parameters of slaughter yields and various predictors in 3-year-old common carp reared communally under semi-intensive pond conditions. The experimental stock was established by a partial factorial design of 20 dams and 40 sires, and 1553 progenies were assigned to their parents using 12 microsatellites. Slaughter yields were highly heritable (h(2) = 0.46 for headless carcass yield, 0.50 for filet yield) and strongly genetically correlated with each other (r(g) = 0.96). To create morphological predictors, external (phenotypes, 2D digitization) and internal measurements (ultrasound imagery) were recorded and combined by multiple linear regression to predict slaughter yields. The accuracy of the phenotypic prediction was high for headless carcass yield (R-2 = 0.63) and intermediate for filet yield (R-2 = 0.49), Interestingly, heritability of predicted slaughter yields (0.48-0.63) was higher than that of the real yields to predict, and had high genetic correlations with the real yields (r(g) = 0.84-0.88). In addition, both predicted yields were highly phenotypically and genetically correlated with each other (0.95 for both), suggesting that using predicted headless carcass yield in a breeding program would be a good way to also improve filet yield. Besides, two individual predictors (P-1 and P-2) included in the prediction models and two simple internal measurements (E4 and E23) exhibited intermediate to high heritability estimates (h(2) = 0.34 - 0.72) and significant genetic correlations to the slaughter yields (r(g) = |0.39 - 0.83|). The results show that there is a solid potential for genetic improvement of slaughter yields by selecting for predictor traits recorded on live breeding candidates of common carp.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10603 - Genetics and heredity (medical genetics to be 3)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

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

Name of the periodical

Frontiers in Genetics

ISSN

1664-8021

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

6/2018

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

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UT code for WoS article

000440207000001

EID of the result in the Scopus database

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