The degree of phenotypic consolidation of different dairy cattle breeding groups
DOI:
https://doi.org/10.31548/animal2019.02.036Keywords:
dairy cattle, phenotypic consolidation, half-siblings, line, breed, milk productivity, reproductive abilityAbstract
The value of various breeding groups of animals is determined not only by their level of productivity, reproduction, product quality, technological adaptability etc., but also by the level of phenotypic consolidation, which ensures the necessary homogeneity and a stable level of desirable traits. The purpose of the research was to study the phenotypic consolidation of various breeding groups of dairy cattle (half-siblings, lines, breeds).It was established that the most consolidated by milk yield, the fat and protein content in milk, the age at first calving and the calving interval are groups of half-siblings (КA5 = 0,202) compared to the phenotypic consolidation of lines (КA5 = 0,035) and breeds (KA5 = 0,088). The most consolidated according to the studied characteristics are the groups of daughters of the bulls Nirvana 101709244 (КA5 = 0,317) and Tahoe 8189401 (КA5 = 0,331), lines of cows and related groups – Marshall2290977 (КA5 = 0,193) and J. Besn 5694028588 (КA5 = 0,103 ), as well as the cattle of Ukrainian Black-and-White and Red-and-White dairy breeds (KA5 = 0,144 and KA5 = 0,129, respectively). It was determined that the level of phenotypic consolidation increases with decreasing of genetic variation of the traits. On average, higher consolidation was observed for traits with low genetic variation (fat and protein content in milk).For milk yield the level of phenotypic consolidation was much lower. For the first calving age and the interval between 1 and 2 calves, the studied groups of animals can be classified on average as unconsolidated. The most consolidated in five traits are the half-siblings cows (the lowest level of the systematic hierarchical structure), and the much lower consolidated are cows of different lines and breeds (higher levels in the systematic hierarchy). Therefore, as the level of the breeding group increases, the degree of their phenotypic consolidation in the breed hierarchy decreases.
References
Petrenko, I. P. (1999). Do teorii konsolidatsii porid u skotarstvi [To the theory of consolidation of breeds in cattle breeding].Rozvedennya i henetyka tvaryn: mizhvidomchyi tematychnyi zbirnyk. Kyiv: Ahrarnanauka,31-32, 185-189.
Polupan, Yu. P. (2001). Problemy konsolidatsii riznykh selektsiinykh hrup tvaryn. [Problems of consolidation of various selection groups of animals].Visnyk ahrarnoi nauky, 12, 41-46.
Ivanov, I. A. (2016). Otsinka fenotypovoi konsolidatsii tekhnolohichnykh pokaznykiv pervistok holshtynskoi ta ukrainskykh chorno-riaboi i chervono-riaboi molochnykh porid. [Estimation of phenotypic consolidation of technological indicators of first-calf cows in Holstein and Ukrainian Black and White and Red and White dairy breeds].Visnyk Dnipropetrovskoho derzhavnoho ahrarno-ekonomichnoho universytetu. Dnipropetrovsk, 4 (42),52-55.
Piddubna, L. (2014). Populiatsiia chorno-riaboi molochnoi khudoby v plemhospodarstvakh pivnichno-poliskoho rehionu. [Population of Black and White dairy cattle in livestock farms of the North-Polis region]. Tvarynnytstvo Ukrainy, 5, 20-24.
Rudyk, I. A.,StavetskaR. V. (2010). Konsolidovanist ta sporidnenist linii holshtynskoi porody v Ukraini. [Consolidation and relationships of lines of Holstein breed in Ukraine]. Tekhnolohiia vyrobnytstva i pererobky produktsii tvarynnytstva: zbirnyk naukovyh prats. BilaTserkva, 3 (72), 3-8.
Khmelnychyi, L. M. (2003). Otsinka henealohichnykh formuvan zastupenem fenotypovoi konsolidatsii. [Assessment of genealogical formations by the degree of phenotype consolidation].Visnyk Sumskoho natsionalnogo ahrarnoho universytetu. Sumy, 7, 269-275.
Shcherbatyi, Z. Ye. (2010). Stupin konsolidatsii selektsiinykh oznak koriv okremykh lini i stada ukrainskoi chorno-riaboi molochnoi porody. [Degree of consolidation of breeding indicators of cows of certain lines of a herd of Ukrainian Black and White dairy breed]. Naukovyi visnyk LNUVMBT imeni S.Z. Gzhytskoho. Lviv, 12 № 2 (44), chastyna 3, 275-279.
Polupan, Yu. P. (2005). Metody vyznachennia stupenia fenotypovoi konsolidatsii selektsiinykh hrup tvaryn. [Methods of determining the degree of phenotypic consolidation of breeding groups of animals]. Metodyky naukovykh doslidzhen iz selektsii, henetyky ta biotekhnolohii u tvarynnytstvi. Kyiv: Ahrarna nauka, 52-60.
Downloads
Additional Files
Published
Issue
Section
License
Relationship between right holders and users shall be governed by the terms of the license Creative Commons Attribution – non-commercial – Distribution On Same Conditions 4.0 international (CC BY-NC-SA 4.0):https://creativecommons.org/licenses/by-nc-sa/4.0/deed.uk
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).