Economic trait of cows with different duration of prenatal growth period

Chernenko, Oleksandr; Chernenko, O. I.

doi:10.32819/2018.63005

Cited by 5 publications

(5 citation statements)

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“…Із цього випливає, що тільки конституційно міцні, високорезистентні й високостресостійкі тварини здатні бути здоровими, високопродуктивними, давати повноцінний приплід, ефективно витримувати щоденні експлуатаційні навантаження і тривалий час використовуватись у стаді (Chernenko & Shulzhenko, 2011;Chernenko & Chernenko, 2018;Williams, 2019).…”

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The economic traits of cows with different types of constitution

Chernenko¹,

Chernenko²,

Mylostyvyi³

et al. 2020

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Presented study results of the influence of constitution types on economically useful traits of highly productive Swiss breed. The experimental animals were divided into three groups according to the standard deviation of 0.67 from the average value of the volume-to-weight coefficient (VWC) for the studied group of same-aged animals at the calving. To the low-volume type with VWC value of less than 0.46 l/kg 16 cows were allocated, to the medium-volume type with VWC of 0.46 to 0.56 l/kg-44 cows respectively, and to the large-volume type with VWC value, which amounted to 0.57 l/kg or more-19 cows. Since the difference in animals' bodyweight of all groups was within 3%, which is a characteristic of matched pairs design, in cows with the constitution of large and medium volume type per kg of their body weight, there was a greater ratio of the thorax which is characterizing volume-to-weight coefficient value. Experimental cows by the main measurements of the exterior were characterized by good development. However, animals of the high and mid-volume type of constitution had deep and wide chests, with a larger chest crosssectional area behind the shoulder blades and behind the last rib, and a larger conditional volume of the whole thorax. The skin on the neck and the last rib turned out to be the most informative for the definition of the body types features. The cows of those constitution types had thinner skin on the neck by 0.4 (P > 0.95) and 0.3 cm (approximately P > 0.95), and at the level of the last rib by 0.3 (approximately P > 0 95) and 0.5 cm (P > 0.95) compared to the low volume type of constitution. According to body indices, cows of all body types had a pronounced and consolidated dairy type. This was evidenced by the low value of the variability coefficient of the exterior indices in the range of 2.2-6.9%. Compared to cows of low volume type, a statistically significant difference was found in favor of cows with the high and medium-volume type of the constitution by chest width index, respectively, by 1.9% (P > 0.999) and 1.8% (P > 0.999) and backside index, respectively: 2,4% (P > 0.99) and 1.0% (P > 0.95). No correlation was found between the cows' behaviour and their type of constitution. It has been established that cows' milk productivity depends on the development of the thorax as a whole and the value of the volume-to-weight coefficient in particular. High and medium-volume type cows for 305 days of the first lactation had higher milk yields by 1 314 kg (P > 0.95), milk fat yield-by 41.6 kg (P > 0.95), and milk protein yield-by 40.8 kg (P > 0.95). There was a similar difference for the second lactation.

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Section: вступunclassified

The economic traits of cows with different types of constitution

Chernenko¹,

Chernenko²,

Mylostyvyi³

et al. 2020

TAVM

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“…Сучасні методи селекції спрямовані на формування у тварин стада вираженості виробничого напряму породи, високого метаболічного статусу організму, міцності будови тіла та високої природної резистентності (Chernenko & Shul`zhenko, 2011;Chernenko & Chernenko, 2018;Mylostyvyi et al, 2019;Williams, 2019). В основному саме ці ознаки визначають успіх у нарощуванні молочної продуктивності, підвищенні якості продукції та збільшення тривалості господарського використання молочної худоби (Chernenko, 2010;Gibson & Dechow, 2018;Dahl, 2020).…”

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Evaluation of cows’ milk productivity by using genetic markers

Gubarenko¹

2020

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Presented results of a study on the relationship of various polymorphic variants of the GH and PIT-1 gene with such economically useful traits as milk yield, milk fat and protein content, the yield of milk protein and fat in highly productive half-sibs of Holstein cows. The experimental animals were divided into groups depending on the combination of different allele forms of the GH and PIT-1 genes. The studies were carried out at ZAO Agro-Soyuz, Dnipropetrovsk region. The total sample сonsisted of 136 half-sibs cows, which were daughters of the Holstein bull Cashmere 131671771. All animals were of the same age. The DNA samples extracted from the experimental animals' blood were subject for the research. To determine the polymorphism of marker genes, the PCR-RFLP method was used. When distributing half-sibs cows on genotypes according to the growth hormone gene GH, were found 124 (91.10%) homozygous animals of LL genotype, 10 (7.50%) heterozygous animals of LV genotype, and 2 (1.40%) homozygous animals of VV genotype. It was established that homozygous half-sibs of LL genotype were dominated over heterozygous half-sibs of LV genotype by milk yield during 303 days for 753 kg (P > 0.99), by the amount of milk fat -for 26.8 kg (P > 0.99), by the amount of milk protein -for 24.7 kg (P > 0.99). An advantage in the main milk productivity indicators of homozygous LL genotype half-sibs of the GH gene over heterozygous LV genotype half-sibs of the GH gene was also observed for 305 days of the second lactation. Heterozygous half-sibs of AB genotype by the PIT-1 gene had an advantage over their peers -homozygous half-sibs of BB genotype, including the milk yield for 425 kg (P > 0.95), the milk fat amount for 16.5 kg (P > 0.95) and the milk protein amount for 14.45 kg (P > 0.99). According to the milk fat and protein content, the difference was not significant. The most pronounced raising effect of the main milk productivity indicators were combinations of GH and PIT-1 paired genes. A part of the complex genotype factor influence on milk yield during 305 days of the first two lactations, the yield of milk fat and protein was about 26.6-30.2% in P> 0.999. The LL homozygosity by the GH gene in combination with the AB and BB genotypes by the PIT-1 gene in the context of the first two lactations was accompanied by higher yield of milk (r = + 0.503 ... 0.505 for P > 0.999), by larger amount of milk fat (r = + 0.503. .. 0.505 for P > 0.999) and milk protein (r = + 0.520 ... 0.530 for P > 0.999). The LL homozygosity by the GH gene in combination with the AB and BB genotypes by the PIT-1 gene in the context of the first two lactations was accompanied by higher yield of milk (r = + 0.503 ... 0.505 for P > 0.999), by larger amount of milk fat (r = + 0.503. .. 0.505 for P > 0.999) and milk protein (r = + 0.520 ... 0.530 for P > 0.999). A statistically significant, direct correlation, average in strength, suggests that the use of genetic markers, in particular GH and PIT-1 genes for growth hormone, will be effective for the selection an...

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“…У них були відсутні проблеми щодо постави кінцівок і формування ратиць. Ці корови мали краще виражений молочний тип порівняно з однолітками з алелем В. Це дасть можливість обʼєктивно оцінювати генетичний потенціал продуктивності тварин та має сприяти підвищенню економічної ефективності галузі (Kovacs et al, 2006;Hradecka et al, 2008;Chernenko & Chernenko, 2018;Trakovická et al, 2019;Borshch et al, 2020).…”

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Exterior features of different Holstein cows’ genotypes

Gubarenko¹

2020

Theor. Appl. Vet. Med.

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This study presents the results of the relationship of various polymorphic variants of the GH and PIT-1 gene with the exterior in highly productive Holstein cows. Experimental animals were divided into groups depending on the combination of different allele forms of GH and PIT-1 genes. PCR method was used to determine the polymorphism of marker genes. Isolation of genomic DNA was performed using resin «Chelex-100». The reaction was carried out in a thermal cycler «Tertsyk» made by «DNA technology». The research was carried out in the Private Joint Stock Company «Agro-Soiuz» Dnipropetrovsk region. The total set sample was 48 half-sibling cows, which were the daughters of the Holstein bull Kashemir 131671771. All animals were even-aged analogues. DNA samples isolated from the peripheral blood of the experimental animals were examined. Restrictase AluI was used for the GH gene restriction. After restriction, 171 bp and 52 bp long fragments were detected in representatives of the LL genotype, and a non-restriction fragment with a length of 223 bp was found in carriers of the VV genotype. Restriction of the amplified fragment of RIT-1 gene was performed using restriction endonuclease HinfI. Fragments 660 bp, 425 bp, and 270 bp long, after processing the PCR products with HinfI restriction endonuclease, corresponded to the A allele; fragments 660 bp, 385 bp, and 270 bp long indicated the B allele. Restriction products were separated by electrophoretic method in 2% agarose gel in Tris Borate EDTA. Measurements and exterior indices studies were performed during the 2nd-3d months of the second lactation. It was found that cows of the LL / AB genotype complex compared with their peers of LV/BB and LL/BB genotypes were higher at the withers and sacrum by 3.1 and 2.9 cm, respectively (2.1 and 1.9%; at P > 0, 99). It was determined that the skin in the middle of the last rib of the LL / AB genotype cows compared to peers of LV/BB genotype was thinner by 0.5 mm (9.6%) at P > 0.95. Other measurements of the exterior in the investigated groups of animals differed little. Peers of LL/BB genotype took an intermediate position in these traits. The strength of the complex genotype influence on the features of the exterior was in the range from 2.7 to 12.6%. Holstein cows of the LL/AB genotype had a significant difference in the mass index by 3.3% at P > 0.95, as well as a slightly larger body volume by 28 134.9 cm3 (3.4%), a lower body density index by 0.037 g/cm3 (4.7%) compared with peers of the LV/BB genotype. It is proposed to select animals with the following LL/AB and LL/BB alleles in the complex genotype in order to obtain cows with a better exterior features.

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Economic trait of cows with different duration of prenatal growth period

Cited by 5 publications

References 11 publications

The economic traits of cows with different types of constitution

The economic traits of cows with different types of constitution

Evaluation of cows’ milk productivity by using genetic markers

Exterior features of different Holstein cows’ genotypes

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