Genetic trend of functional productive life in the population of black and white cattle in Serbia

Stanojević, Dragan; Đedović, Radica; Bogdanović, Vladan; Raguž, Nikola; Kučević, Denis; Popovac, Mladen; Stojić, Petar; Samolovac, Ljiljana

doi:10.2298/gensr1803855s

Cited by 8 publications

(5 citation statements)

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“…Increase in sire breeding values is distinguished. Genetic trends of LPL sires of two breeds in Slovakia were similar in compare with many authors (van Doormaal, 2009;Raguž et al, 2014;Egger-Danner et al, 2015;Stanojević et al, 2018;Morek-Kopeć et al, 2017). The negative genetic trends in functional longevity found Imbayarwo-Chikosi et al (2017) in South Africa Holstein cattle and Jenko et al (2013) in Slovenian Brown cattle, which could have been resulting from intense selection on high milk production.…”

Section: Discussionsupporting

confidence: 83%

Genetic Trend of Length of Productive Life in Holstein and Slovak Simmental Cattle in Slovakia

Strapáková¹,

Strapák²,

Candrák³

2019

Acta Univ. Agric. Silvic. Mendelianae Brun.

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National genetic evaluation of lengh of productive life in Slovakia was carry out from the year 2014 till 2018, three times per year (March, June and October). The survival analysis was performed using Weibull sire model. The heritability obtained from Weibull model was different between populations (0.13 in Holstein and 0.05 in Slovak Simmental, respectively). RBVs of Holstein sires born up to 1999 shows decreasing tendency in all five years. A desirable tendency started from the year 2000. Differences between RBV in particular years are due to descent censored records during the evaluated period. Similar trends showed in Slovak Simmental bulls RBVs. Culled cows reached average 305-day milk yield 6499 kg and 4645 kg in Holstein and Slovak Simmental breeds, respectively. The length of productive life there was 898 days in Holstein and 985 days in Slovak Simmental cows. Age at first calving reached 930 days in Slovak Simmental and 851 days in Holstein heifers. The progress of both traits in the years 2014–2018 was lower in Holstein population, +288 kg milk and +76 productive days than in Slovak Simmental cows.

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Section: Discussionsupporting

confidence: 83%

Genetic Trend of Length of Productive Life in Holstein and Slovak Simmental Cattle in Slovakia

Strapáková¹,

Strapák²,

Candrák³

2019

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…Pelt et al, 2015 The cow's ability to avoid involuntary culling or culling not correlated with its own production. Stanojević et al, 2018 The capability of cows to delay involuntary culling for infertility or diseases. Strapáková et al, 2019…”

Section: Functional Longevitymentioning

confidence: 99%

Analysis of Longevity Traits in Holstein Cattle: A Review

et al. 2021

Front. Genet.

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Dairy cow longevity is an essential economic trait that can supplement the breeding value of production traits, which is related to the herd time and lifetime milk yield of dairy cows. However, longevity is a relatively difficult trait to select for dairy cow breeding due to low heritability and numerous influence factors of the longevity in dairy cows. Longevity trait has been used as an important breeding target of a comprehensive selection index in many dairy developed countries; however, it has not been included in performance index in many developing countries. At present, cows in these countries are still in the primary stage of “large quantity, low quality, high cost, and low yield.” The average parity of dairy cows is less than 2.7, which is difficult to maintain the production efficiency to meet the demands of the dairy industry. Therefore, there is an urgent need to select and breed for the longevity of dairy cows. The various definitions and models (including linear, threshold, random regression, sire, and survival analysis) of longevity were reviewed and standardized. Survival analysis is the optimal model to evaluate longevity, and the longevity heritability is 0.01–0.30 by using different definitions and models. Additionally, the relationship between longevity and other traits was summarized, and found that longevity was regulated by multiple factors, and there were low or medium genetic correlations between them. Conformation traits, milk production traits, reproductive traits, and health traits may be used as indicators to select and breed the longevity of dairy cows. The genetic assessment methods, heritability, influencing factors, importance, breeding, and genetics of longevity were reviewed in the manuscript, which could provide a valuable reference for the selective breeding to extend the productive life of Holstein cattle.

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“…The modern approach to dairy cattle selection has led to defining new breeding programmes whose focus of selection is shifted from milk production traits to a much more balanced approach, with the accent placed on functional traits, such as longevity and type traits (Miglior et al, 2005;Němcová et al, 2011;Tapki and Guzey, 2013). The new National Breeding Programme in the Republic of Serbia has set as its goal the breeding of Holstein-Friesian cows with desirable type traits, longevity, good fertility, and robustness, while retaining the existing high milk yield (Janković, 2017;Stanojević et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Estimation of heritability and genetic correlations between milk yield and linear type traits in primiparous Holstein-Friesian cows

Ismael¹,

Janković²,

Stanojević³

et al. 2021

Revista Brasileira De Zootecnia

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Breeding and geneticsFull-length research article Estimation of heritability and genetic correlations between milk yield and linear type traits in primiparous Holstein-Friesian cows ABSTRACT -Estimation of genetic variability and genetic correlations between production traits (milk yield, fat yield, fat content, protein yield, and protein content) and selected type traits (angularity, fore udder height, rear udder height, front teat placement, teat length, and udder depth) was done using data sets of 10,860 firstcalving Holstein-Friesian cows raised in the territory of the Republic of Serbia. Genetic variance and covariance were obtained using the Restricted Maximum Likelihood (REML) method, VCE v6 software, and the multi-trait mixed model. To enable more precise estimates of values for genetic variances and covariance, a relationship matrix was formed for the individual model (animal model), encompassing 21363 animals. The highest heritability values were obtained for milk yield (0.182), fat yield (0.134), and protein yield (0.170). The lowest heritability estimates were for teat length, front teat placement, rear udder height, and udder depth, all being under 0.110. Genetic correlations between production traits and linear type traits were between −0.131 (fat content and front teat length) and 0.307 (protein yield and fore udder attachment). The largest number of traits shows a positive genetic correlation with the traits of milk yield, which thus indicates possibility of genetic improvements of milk yield in cattle without jeopardizing the type traits or vice versa.

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Genetic trend of functional productive life in the population of black and white cattle in Serbia

Cited by 8 publications

References 8 publications

Genetic Trend of Length of Productive Life in Holstein and Slovak Simmental Cattle in Slovakia

Genetic Trend of Length of Productive Life in Holstein and Slovak Simmental Cattle in Slovakia

Analysis of Longevity Traits in Holstein Cattle: A Review

Estimation of heritability and genetic correlations between milk yield and linear type traits in primiparous Holstein-Friesian cows

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