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Impact of Dietary Regime and Seasonality on Hindgut’s Mycobiota Diversity in Dairy Cows
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Impact of Dietary Regime and Seasonality on Hindgut’s Mycobiota Diversity in Dairy Cows
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Journal Article
Impact of Dietary Regime and Seasonality on Hindgut’s Mycobiota Diversity in Dairy Cows
2023
Overview
We describe and discuss the intestinal mycobiota of dairy cows reared in France following variations in dietary regimes and two seasons. Two groups of 21 animals were followed over a summer and winter period, and another group of 28 animals was followed only during the same summer season. The summer diet was based on grazing supplemented with 3–5 kg/d of maize, grass silage and hay, while the winter diet consisted of 30% maize silage, 25% grass silage, 15% hay and 30% concentrate. A total of 69 DNA samples were extracted from the feces of these cows. Amplification and sequencing of the ITS2 region were used to assess mycobiota diversity. Analyses of alpha and beta diversity were performed and compared statistically. The mycobiota changed significantly from summer to winter conditions with a decrease in its diversity, richness and evenness parameters, while beta diversity analysis showed different mycobiota profiles. Of note, the Geotrichum operational taxonomic unit (OTU) was prevalent in the winter group, with a mean relative abundance (RA) of 65% of the total mycobiota. This Geotrichum OTU was also found in the summer group, but to a lesser extent (5%). In conclusion, a summer grazing diet allowed a higher fecal fungal diversity. These data show, for the first time, that a change in diet associated with seasonality plays a central role in shaping hindgut fungal diversity.
Publisher
MDPI AG,MDPI,Multidisciplinary Digital Publishing Institute (MDPI)
Subject
/ Cattle
/ Corn
/ Diet
/ DNA
/ Feces
/ France
/ Fungi
/ Grasses
/ Grazing
/ Hay
/ Hindgut
/ Identification and classification
/ Microbiota (Symbiotic organisms)
/ Médecine vétérinaire & santé animale
/ Protozoa
/ Silage
/ Summer
/ Taxonomy
/ Veganism
/ Veterinary medicine & animal health
/ Virology
/ Winter
