Variability of Longevity Traits of Cows of Ukrainian Black-and-White Dairy Breed in Various Variants of Selection

Khmelnychyi, L. M.; Loboda, A. V.

doi:10.31073/abg.57.17

Cited by 9 publications

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“…Одним із основних факторів ефективної селекції порід є рівень вирощування ремонтного молодняку, який у всі вікові періоди спричиняє достовірний вплив на здоров'я тварин та їх майбутню продуктивність, тривалість господарського використання і значною мірою визначає ефективність галузі молочного скотарства (Trotsenko, 2010;Khmelnychyi, 2012;Kuziv et al, 2014;Khmelnychyi et al, 2014). Найшвидший розвиток тварин відбувається у ранньому віці.…”

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Dairy productivity of Simmental breed cows depending on their live weight during growing period

Fedorovych

2017

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One of the main factors for effective breeding is the level of growth of repair young animals, which at all ages has a significant impact on animal health and their future productivity, duration of economic use and largely determines the efficiency of the dairy farming industry. It is important to know the potential capabilities of each animal's body since its birth, since the genetically programmed productivity of cows can only be realized if they are favorably grown at different ages at a young age. Therefore, the purpose of the research was to study the dependence of the milk productivity of the Simmental breed cows on their live weight during the period of growing. The research was carried out at LCC «Litinske», Drohobych district of Lviv region. The live weight of cows was studied at the age of 6, 12, 18 months, at the first insemination and after the first calving, and the assessment of milk productivity was carried out on the basis of diet, the fat content of milk and the amount of milk fat for the first, second, third and best lactation on the materials of the primary zootechnical accounting. It was established that the milk yield of cows, depending on lactation, were within the range of 3026.4–3685.8 kg, the fat content of milk – within 3.76–3.80% and the amount of milk fat – within the range of 113.6–139.8 kg. The live weight of the experimental animals at birth was 32.5, at 6 months – 185.9, in 12 months – 302.3, in 18 months – 405.2, at the first insemination – 396.9 and in the first calving – 514.7 kg It should be noted that the first fertile insemination of Simmental heifers occurred at the age of 19.7 months, and their first calving – at the age of 29.0 months. The highest diet and the amount of milk fat in cows were observed for their live weight at birth 33–34 kg, at 6 months of age – 171–190, in 12 months – 291–300, in 18 months – 401–415, at the first insemination – 416–430 and in the first calving – 501–530 kg. The correlation coefficients of the live weight of animals at young age and their subsequent milk productivity, depending on the age and lactation of the animals, were within the range of 0.18–0.24, and the influence of live weight of heifers on their subsequent milk productivity – within 12.3–20.1%.

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Dairy productivity of Simmental breed cows depending on their live weight during growing period

Fedorovych

2017

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“…Similar variability in sire offspring, regardless of origin, was observed in lifetime milk fat yield, with variation ranging from 570.5-1197.9 kg, with the highest indicator in daughters of Holstein bull Caprice 401393 and the lowest in daughters of domestic sire Katka 5218. Keywords: Ukrainian Black-and-White dairy, bulls-sires, duration of use, longevity, milk yield, milk fat Використання різних генеалогічних формувань у системі чистопородного розведення молочної худоби України є загально прийнятою тривалою практикою, оскільки використання в процесі селекції як внутрішньолінійного, так і міжлінійного підбору, за умови вдалого варіанту, дозволяє отримувати позитивний ефект в аспекті поліпшення ознак молочної продуктивності, довголіття, відтворювальної здатності, вирощування ремонтного молодняку, екстер'єрного типу тощо (Didkivskyi et al, 2014;Fedorovych et al, 2022;Khmelnychyi et al, 2023;Khmelnychyi et al, 2019;Mazur et al, 2018;Polupan, 2014;Polupan et al, 2021;Razanova, 2019).…”

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Characteristics the Offspring of Sires by Longevity Traits of the Herd for Breeding Ukrainian Black-and-White Dairy Breed

Kompanets

2023

Anim. Breed. and Genet.

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Based on studies of the offspring of sires in a herd for breeding the Ukrainian Black-and-White dairy breed (UBWD), a significant influence of their heredity on the variability of longevity traits has been established. According to the duration of productive use, the variability between extreme options was 1061 days, and in terms of the number of lactations used during life, it was ‑ 2.7, with high reliability for both traits (P < 0.001). The variability of longevity traits did not depend on the origin of the sires, among whom there are purebred Holsteins and bulls of domestic selection of Ukrainian Black-and-White dairy breed of different genotypes and lines. It was found that the quantity of days of productive use and the number of used lactations during the life of cows of different origins are positively correlated with indicators of productive longevity ‑ lifetime milk yield and milk fat, and milk yield per day of productive use. Variability in lifetime milk yield varied widely, from 14934 (daughters of the sire Katka 5218, Metta line, UBWD), to 33031 kg (daughters of the sire Marcellus 136057831, line P. F. A. Chief, Holstein breed), with a high reliable difference between them, which amounted to 18097 kg (P < 0.001). The milk fat content of the daughters of the assessed sires also differed in significant, at a reliable level, variability within the range of 3.72–3.85% with a difference between the extreme options of 0.13% (P < 0.001). Similar variability in sire offspring, regardless of origin, was observed in lifetime milk fat yield, with variation ranging from 570.5–1197.9 kg, with the highest indicator in daughters of Holstein bull Caprice 401393 and the lowest in daughters of domestic sire Katka 5218.

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Milk Productivity of Cows Under Different Options of Parental Pair Selection

Fedorovych

Shpyt

et al. 2023

Anim. Breed. and Genet.

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Introduction. One of the main ways to improve dairy herds is through the identification and utilization of the most effective combinations of parent pairs. This can be achieved by both within-line selection and crossbreeding. It is important to identify the most promising lines and their optimal combinations to ensure their effective utilization for further herd improvement. According to many authors, a systematic approach that involves identifying successful and unsuccessful combinations with the repeated use of the most effective variants will reliably contribute to the increase of the genetic potential of dairy cattle productivity. Materials and methods of research. In light of the above, the aim of our research was to investigate the formation of milk production traits in Ukrainian Black-and-White dairy cows in different farms of Ukraine, depending on various options for parent selection. The research was conducted on first-calf heifers and mature cows (third lactation) of Ukrainian Black-and-White dairy breed in three farms: SE EF "Oleksandrivske" in Vinnytsia region (Forest-Steppe zone, n = 714), LLC AE "Imeni Volovikova" in Rivne region (Polissya zone, n = 1840), and SE "Experimental farm "Askaniyske" in Kherson region (Steppe zone, n = 926). The sample included cows that had completed at least the third lactation during the research. In the study animals, the milk production traits (milk yield, milk fat content, and milk fat yield) were studied based on various options of within-line and between-line parent selection through retrospective analysis of zootechnical records data over the past ten years. Research results. The analysis of between-line selection of Ukrainian Black-and-White dairy animals in SE EF "Oleksandrivske" showed that the most successful combinations for milk yield and milk fat yield in first-calf heifers were when the dams belonged to the Valiant line and the sires belonged to the Chif line. For mature cows (third lactation), the most successful combinations were when the dams belonged to the Eleveishn line and the sires belonged to the Starbuck line. The lowest values of the mentioned traits for the studied lactations were observed in cows obtained from the crossbreeding of the R. Meximes-Chif and S. T. Rokita-Chif lines, respectively. In LLC AE "Imeni Volovikova", the most productive animals for the first lactation were those obtained from the combination of the Starbuck-Bella lines, while for the third lactation, the individuals derived from the crossbreeding of the Bella-Chif lines showed the highest productivity. The least successful combination for both studied lactations was when the dams belonged to the S. T. Rokita line and the sires belonged to the Bella line, as animals resulting from this crossbreeding had the lowest milk yield and milk fat yield values. SE "Experimental farm "Askaniyske", the highest milk yield and milk fat yield values for the first lactation were observed in individuals whose dams belonged to the Seateischna line and the sires belonged to the Starbuck line. For the third lactation, the highest values of the mentioned traits were found in cows obtained from the combination of the Chif-Starbuck lines. The lowest productivity for the mentioned lactations was observed in cows resulting from the crossbreeding of the R. Sovering-Bella and R. Sovering-Chif lines, respectively. In the internal line breeding at the SE EF "Oleksandrivske," the most productive individuals were found to be first-generation offspring whose parents belonged to the Chief line, and mature cows from the Starbuck line. In the LLC AE "Imeni Volovikova" the animals from the Bella line showed superior performance in both lactations. In the SE "Experimental farm "Askaniyske" cows from the Eleveishn line were found to be the most productive. Regarding milk fat content in the Forest-Steppe zone, the best performers were first-generation offspring resulting from the combination of the Cavalier-Chief lines, as well as mature cows from the Eleveishn-Starbuck cross. In the Polissya zone, animals obtained from the Eleveishn-Bella and Starbuck-Bella crosses showed the highest milk fat content. In the Steppe zone, first-generation and mature cows whose mothers belonged to the R. Sovereign line and fathers belonged to the Chief and Bella lines, respectively, demonstrated superior traits. Conclusions. Thus, improvement of economically important traits in animals can be achieved through both internal line breeding and interline breeding. In this regard, it is crucial to identify the best line combinations and effectively utilize them in further breeding work.

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Variability of Longevity Traits of Cows of Ukrainian Black-and-White Dairy Breed in Various Variants of Selection

Cited by 9 publications

References 1 publication

Dairy productivity of Simmental breed cows depending on their live weight during growing period

Dairy productivity of Simmental breed cows depending on their live weight during growing period

Characteristics the Offspring of Sires by Longevity Traits of the Herd for Breeding Ukrainian Black-and-White Dairy Breed

Milk Productivity of Cows Under Different Options of Parental Pair Selection

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