Dry Matter Intake Prediction from Milk Spectra in Sarda Dairy Sheep

Ledda, A.; Carta, Silvia; Correddu, Fabio; Cesarani, Alberto; Atzori, Alberto Stanislao; Battacone, Gianni; Macciotta, Nicolò Pietro Paolo

doi:10.3390/ani13040763

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…Also, sheep milk spectra can be used to recognize dietary regimens or feeding systems (Molle et al, 2021). Hammami et al (2010) reported that sheep FTIR spectra of can be used to monitor milk quality during the lactation period, whereas Ledda et al (2023) predicted dry matter intake from FTIR spectra in lactating Sarda ewes. Thus, a deeper knowledge about the FTIR spectra determinism could help to better understand the relationship with other important traits that could be included in the breeding programs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of phenotypic, genetic and genomic background of Milk spectra in Sarda dairy sheep

Congiu,

Falchi,

Carta

et al. 2023

J Animal Breeding Genetics

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Aim of this study was to analyse the genetic background of milk Fourier transform infrared (FTIR) spectra in dairy sheep. Individual milk FTIR spectra, with 1060 wavenumbers each, were available for 793 adult Sarda breed ewes genotyped at 45,813 SNP. The absorbance values of each wavenumber was analysed using a linear mixed model that included dim class, parity and lambing month as fixed effects and flock‐test date and animal as random effects. The model was applied to estimate variance components and heritability and to perform a genome‐wide association study for each wavenumber. Average h2 of wavenumbers absorbance was 0.13 ± 0.08, with the largest values observed in the regions associated with the characteristic bonds of carbonylic and methylenic groups of milk fat (h2 = 0.57 at 1724–1728 cm−1; and h2 = 0.34 at 2811–2834 cm−1, respectively). The absorbance values of wavenumbers were moderately correlated with the estimated heritabilities. After the Bonferroni correction, a total of nine markers were found to be significantly associated with 32 different wavenumbers. Of particular interest was the SNP s63269.1, mapped on chromosome 2, that was found to be associated with 27 wavenumbers. Genes previously found to be related to traits of interest (e.g. disease resistance, milk yield and quality, cheese firmness) are located close to the significant SNP. As expected, the heritability estimated for the absorbance of each wavenumbers seems to be associated with the related milk components.

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Section: Introductionmentioning

confidence: 99%

Investigation of phenotypic, genetic and genomic background of Milk spectra in Sarda dairy sheep

Congiu,

Falchi,

Carta

et al. 2023

J Animal Breeding Genetics

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“…Increased milk production encourages dry matter consumption due to increased energy and nutrient requirements in animals. Studies (Ledda et al, 2023) showed a link between dry matter consumption and productivity. The experiment was conducted on sheep, so it is necessary to clarify this hypothesis on cattle.…”

Section: Introductionmentioning

confidence: 99%

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2023

Scientific Horizons

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Свідоцтво про державну реєстрацію друкованого засобу масової інформації серії КВ № 24997-14937 ПР Науковий журнал включено до категорії А Переліку наукових фахових видань України, у яких можуть публікуватися результати дисертаційних робіт на здобуття наукових ступенів доктора та кандидата ветеринарних, економічних, сільськогосподарських і технічних наук зі спеціальностей: 051 -Економіка; 071 -Облік і оподаткування; 072 -Фінанси, банківська справа та страхування; 073 -Менеджмент; 075 -Маркетинг;

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Section: Introductionmentioning

confidence: 99%

Increased lactation in females due to the use of probiotic-based feed additives

Shkromada,

Hrek,

Fotin

et al. 2023

Scientific Horizons

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The transition of females from childbirth to lactation is a physiologically complex period characterised by metabolic, endocrine and immunological changes. In addition, difficult labour drains the female and can lead to hypolactia. The purpose of the study was to determine the effect of probiotics on lactation recovery and metabolic changes in the body of females. Among the methods used are: the determination of lactation level, the physiological method for determining live weight, the biochemical method for blood testing; and the statistical method. The application of Bacillus subtilis AX 20, Bacillus licheniformis EA 22 contributes to an increase in milk productivity in cows on day 7-9 of the study by 12.9%, on day 10-12 – by 15.03%, on day 13-15 – by 13.93%, on day 16-18 – by 13.5% and on day 19-21 – by 21.35% compared to the control. The total protein content in experimental cows increased by 18.92%, globulins – by 37.26 (p≤0.05), compared to the initial indicators. The activity of alanine aminotransferase, urea, and urea nitrogen in animals of the control and experimental groups was within the normal range during the experiment. The application of Bacillus megaterium NCH 55 to sows with hypolactation contributes to lactation recovery in sows. In the experimental group, piglets showed a lag in growth of 18.5% on the third day and 11.39% on the tenth day due to hypolactation. Starting from day 15, there was an increase in the live weight of suckling piglets due to the restoration of lactation in sows by 20.56%, on day 20 – by 20.43%, on day 25 – by 30.56%, on day 30 – by 31.91%, compared to the control. In the blood serum of experimental sows, the content of total protein increased by 10%, globulins – by 19.13%, total cholesterol – by 40.11%, urea by 48.0%, compared to the beginning of studies (p≤0.05). The activity of alanine aminotransferase in the experiment increased by 8.95% (p≤0.05), alkaline phosphatase decreased by 27.46% (p≤0.05), compared to the beginning of the study. In the blood of experimental sows, the level of circulating immune complexes increased by 42.85% and a decrease in seromucoids by 30.43%. The practical value of the study lies in the use of probiotics to restore the milk productivity of cows and sows after childbirth

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Dry Matter Intake Prediction from Milk Spectra in Sarda Dairy Sheep

Cited by 6 publications

References 41 publications

Investigation of phenotypic, genetic and genomic background of Milk spectra in Sarda dairy sheep

Investigation of phenotypic, genetic and genomic background of Milk spectra in Sarda dairy sheep

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Increased lactation in females due to the use of probiotic-based feed additives

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